Merge PR #861: Make the energy charts scrollable

libnymea-app/energy/energylogs.cpp

@@ -1,6 +1,7 @@
 #include "energylogs.h"
 
 #include <QMetaEnum>
+#include <QJsonDocument>
 
 #include "logging.h"
 NYMEA_LOGGING_CATEGORY(dcEnergyLogs, "EnergyLogs")
@@ -59,9 +60,9 @@ void EnergyLogs::setEngine(Engine *engine)
         if (m_engine->jsonRpcClient()->experiences().value("Energy").toString() >= "1.0") {
             m_engine->jsonRpcClient()->registerNotificationHandler(this, "Energy", "notificationReceivedInternal");
 
-            if (m_ready && !m_loadingInhibited) {
-                fetchLogs();
-            }
+//            if (m_ready && !m_loadingInhibited) {
+//                fetchLogs();
+//            }
         }
     }
 }
@@ -76,8 +77,7 @@ void EnergyLogs::setSampleRate(SampleRate sampleRate)
     if (m_sampleRate != sampleRate) {
         m_sampleRate = sampleRate;
         emit sampleRateChanged();
-
-        fetchLogs();
+        clear();
     }
 }
 
@@ -136,9 +136,9 @@ void EnergyLogs::setLoadingInhibited(bool loadingInhibited)
         m_loadingInhibited = loadingInhibited;
         emit loadingInhibitedChanged();
 
-        if (!m_loadingInhibited) {
-            fetchLogs();
-        }
+//        if (!m_loadingInhibited) {
+//            fetchLogs();
+//        }
     }
 }
 
@@ -150,7 +150,7 @@ void EnergyLogs::classBegin()
 void EnergyLogs::componentComplete()
 {
     m_ready = true;
-    fetchLogs();
+//    fetchLogs();
 }
 
 int EnergyLogs::rowCount(const QModelIndex &parent) const
@@ -166,6 +166,16 @@ QVariant EnergyLogs::data(const QModelIndex &index, int role) const
     return QVariant();
 }
 
+double EnergyLogs::minValue() const
+{
+    return m_minValue;
+}
+
+double EnergyLogs::maxValue() const
+{
+    return m_maxValue;
+}
+
 EnergyLogEntry *EnergyLogs::get(int index) const
 {
     if (index < 0 || index >= m_list.count()) {
@@ -174,27 +184,54 @@ EnergyLogEntry *EnergyLogs::get(int index) const
     return m_list.at(index);
 }
 
-void EnergyLogs::appendEntry(EnergyLogEntry *entry)
+EnergyLogEntry *EnergyLogs::find(const QDateTime &timestamp)
+{
+    if (m_list.isEmpty()) {
+        return nullptr;
+    }
+    QDateTime first = m_list.first()->timestamp();
+    if (timestamp < first || timestamp > m_list.last()->timestamp()) {
+        return nullptr;
+    }
+    int index = qRound(1.0 * first.secsTo(timestamp) / (m_sampleRate * 60));
+    if (index < 0 || index >= m_list.count()) {
+        return nullptr;
+    }
+    return m_list.at(index);
+}
+
+void EnergyLogs::appendEntry(EnergyLogEntry *entry, double minValue, double maxValue)
 {
     entry->setParent(this);
-    beginInsertRows(QModelIndex(), m_list.count(), m_list.count());
+    int index = m_list.count();
+    beginInsertRows(QModelIndex(), index, index);
     m_list.append(entry);
     endInsertRows();
     emit countChanged();
-    emit entryAdded(entry);
-    emit entriesAdded({entry});
+    emit entryAdded(index, entry);
+    emit entriesAdded(index, {entry});
+    if (minValue < m_minValue) {
+        m_minValue = minValue;
+        emit minValueChanged();
+    }
+    if (maxValue > m_maxValue) {
+        m_maxValue = maxValue;
+        emit maxValueChanged();
+    }
 }
 
 void EnergyLogs::appendEntries(const QList<EnergyLogEntry *> &entries)
 {
-    beginInsertRows(QModelIndex(), m_list.count(), m_list.count() + entries.count());
-    foreach (EnergyLogEntry* entry, entries) {
+    int index = m_list.count();
+    beginInsertRows(QModelIndex(), index, index + entries.count());
+    for (int i = 0; i < entries.count(); i++) {
+        EnergyLogEntry* entry = entries.at(i);
         entry->setParent(this);
         m_list.append(entry);
-        emit entryAdded(entry);
+        emit entryAdded(index + i, entry);
     }
     endInsertRows();
-    emit entriesAdded(entries);
+    emit entriesAdded(index, entries);
     emit countChanged();
 }
 
@@ -206,18 +243,92 @@ QVariantMap EnergyLogs::fetchParams() const
 void EnergyLogs::getLogsResponse(int commandId, const QVariantMap &params)
 {
     Q_UNUSED(commandId)
-    if (!m_list.isEmpty()) {
-        beginResetModel();
-        qDeleteAll(m_list);
-        m_list.clear();
-        endResetModel();
+
+    double minValue = 0, maxValue = 0;
+//    qCDebug(dcEnergyLogs()) << "Logs response:" << qUtf8Printable(QJsonDocument::fromVariant(params).toJson());
+    QList<EnergyLogEntry*> entries = unpackEntries(params, &minValue, &maxValue);
+
+    if (!entries.isEmpty()) {
+        if (m_list.isEmpty()) {
+            qCDebug(dcEnergyLogs()) << "Energy logs received";
+            beginInsertRows(QModelIndex(), 0, entries.count());
+            m_list.append(entries);
+            endInsertRows();
+            emit entriesAdded(0, entries);
+            m_minValue = minValue;
+            emit minValueChanged();
+            m_maxValue = maxValue;
+            emit maxValueChanged();
+
+        } else if (entries.first()->timestamp() < m_list.first()->timestamp()) {
+
+            if (entries.last()->timestamp().addSecs(m_sampleRate * 60) == m_list.first()->timestamp()) {
+                beginInsertRows(QModelIndex(), 0, entries.count());
+                m_list = entries + m_list;
+                endInsertRows();
+                emit entriesAdded(0, entries);
+                if (minValue < m_minValue) {
+                    m_minValue = minValue;
+                    emit minValueChanged();
+                }
+                if (maxValue > m_maxValue) {
+                    m_maxValue = maxValue;
+                    emit maxValueChanged();
+                }
+            } else {
+                // End of fetched entries does not line up with start of existing entries. Discarding existing entries
+                qCDebug(dcEnergyLogs()) << "End of fetched entries does not line up with start of existing entries. Discarding existing entries" << entries.last()->timestamp().addSecs(m_sampleRate * 60).toString() << " - " << m_list.first()->timestamp().toString();
+                clear();
+                beginInsertRows(QModelIndex(), 0, entries.count());
+                m_list.append(entries);
+                endInsertRows();
+                emit entriesAdded(0, entries);
+                m_minValue = minValue;
+                emit minValueChanged();
+                m_maxValue = maxValue;
+                emit maxValueChanged();
+            }
+
+        } else if (entries.first()->timestamp().addSecs(-m_sampleRate * 60) == m_list.last()->timestamp()) {
+            int index = m_list.count();
+            beginInsertRows(QModelIndex(), m_list.count(), m_list.count() + entries.count());
+            m_list.append(entries);
+            endInsertRows();
+            emit entriesAdded(index, entries);
+            if (minValue < m_minValue) {
+                m_minValue = minValue;
+                emit minValueChanged();
+            }
+            if (maxValue > m_maxValue) {
+                m_maxValue = maxValue;
+                emit maxValueChanged();
+            }
+        } else {
+            // Start of fetched entries does not line up with end of existing entries. Discarding existing entries
+            clear();
+            beginInsertRows(QModelIndex(), 0, entries.count());
+            m_list.append(entries);
+            endInsertRows();
+            emit entriesAdded(0, entries);
+            m_minValue = minValue;
+            emit minValueChanged();
+            m_maxValue = maxValue;
+            emit maxValueChanged();
+        }
+
+    } else {
+        qCDebug(dcEnergyLogs()) << "Received empty log entries set.";
     }
-    qCDebug(dcEnergyLogs()) << "Energy logs received";
-//    qCDebug(dcEnergyLogs()) << "Energy logs:" << params;
-    logEntriesReceived(params);
 
     m_fetchingData = false;
-    emit fetchingDataChanged();
+
+    if (m_fetchAgain) {
+        qCDebug(dcEnergyLogs()) << "Fetching again...";
+        m_fetchAgain = false;
+        fetchLogs();
+    } else {
+        emit fetchingDataChanged();
+    }
 }
 
 void EnergyLogs::notificationReceivedInternal(const QVariantMap &data)
@@ -234,32 +345,72 @@ void EnergyLogs::notificationReceivedInternal(const QVariantMap &data)
     notificationReceived(data);
 }
 
+void EnergyLogs::clear()
+{
+    int count = m_list.count();
+    beginResetModel();
+    qDeleteAll(m_list);
+    m_list.clear();
+    endResetModel();
+    emit countChanged();
+    emit entriesRemoved(0, count);
+    m_minValue = 0;
+    emit minValueChanged();
+    m_maxValue = 0;
+    emit maxValueChanged();
+}
+
 void EnergyLogs::fetchLogs()
 {
     if (m_loadingInhibited || !m_ready || !m_engine || m_engine->jsonRpcClient()->experiences().value("Energy").toString() < "1.0") {
         return;
     }
 
-    if (!m_list.isEmpty()) {
-        beginResetModel();
-        qDeleteAll(m_list);
-        m_list.clear();
-        endResetModel();
+    if (m_fetchingData) {
+        qCDebug(dcEnergyLogs()) << "Already busy.. queing up call";
+        m_fetchAgain = true;
+        return;
+    }
+
+    QVariantMap params = fetchParams();
+    QMetaEnum metaEnum = QMetaEnum::fromType<SampleRate>();
+    params.insert("sampleRate", metaEnum.valueToKey(m_sampleRate));
+
+    if (!m_startTime.isNull() && !m_endTime.isNull()) {
+        QDateTime startTime;
+        QDateTime endTime;
+
+        QDateTime oldestExisting = m_list.count() > 0 ? m_list.first()->timestamp() : QDateTime();
+        QDateTime newestExisting = m_list.count() > 0 ? m_list.last()->timestamp() : QDateTime();
+        qCDebug(dcEnergyLogs()) << "request timeframe: " << m_startTime.toString() << " - " << m_endTime.toString();
+        qCDebug(dcEnergyLogs()) << "existing timeframe:" << oldestExisting.toString() << "- " << newestExisting.toString();
+
+        if (oldestExisting.isNull() || newestExisting.isNull()) {
+            startTime = m_startTime;
+            endTime = m_endTime;
+        } else {
+
+            if (m_startTime < oldestExisting) {
+                startTime = m_startTime;
+                endTime = qMin(m_endTime, oldestExisting.addSecs(-m_sampleRate * 60));
+            } else if (newestExisting < m_endTime) {
+                startTime = qMax(m_startTime, newestExisting.addSecs(m_sampleRate * 60));
+                endTime = m_endTime;
+            } else {
+                // Nothing to do...
+                return;
+            }
+        }
+
+        params.insert("from", startTime.toSecsSinceEpoch());
+        params.insert("to", endTime.toSecsSinceEpoch());
+        qCDebug(dcEnergyLogs()) << "Fetching from" << startTime.toString() << "to" << endTime.toString() << "with sample rate" << m_sampleRate;
     }
 
     m_fetchingData = true;
     fetchingDataChanged();
 
-    QVariantMap params = fetchParams();
-    QMetaEnum metaEnum = QMetaEnum::fromType<SampleRate>();
-    params.insert("sampleRate", metaEnum.valueToKey(m_sampleRate));
-    if (!m_startTime.isNull()) {
-        params.insert("from", m_startTime.toSecsSinceEpoch());
-    }
-    if (!m_endTime.isNull()) {
-        params.insert("to", m_endTime.toSecsSinceEpoch());
-    }
-    qCDebug(dcEnergyLogs()) << this << "Fetching energy logs" << params;
+    qCDebug(dcEnergyLogs()) << "Fetching" << m_startTime << m_endTime;
     m_engine->jsonRpcClient()->sendCommand("Energy.Get" + logsName(), params, this, "getLogsResponse");
 }
 

libnymea-app/energy/energylogs.h

@@ -34,6 +34,10 @@ class EnergyLogs : public QAbstractListModel, public QQmlParserStatus
     Q_PROPERTY(bool live READ live WRITE setLive NOTIFY liveChanged)
     Q_PROPERTY(bool fetchingData READ fetchingData NOTIFY fetchingDataChanged)
     Q_PROPERTY(bool loadingInhibited READ loadingInhibited WRITE setLoadingInhibited NOTIFY loadingInhibitedChanged)
+    Q_PROPERTY(double minValue READ minValue NOTIFY minValueChanged)
+    Q_PROPERTY(double maxValue READ maxValue NOTIFY maxValueChanged)
+
+    friend class ThingPowerLogs;
 
 public:
     enum SampleRate {
@@ -77,13 +81,19 @@ public:
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
     QVariant data(const QModelIndex &index, int role) const override;
 
+    double minValue() const;
+    double maxValue() const;
+
     Q_INVOKABLE EnergyLogEntry* get(int index) const;
+    Q_INVOKABLE EnergyLogEntry* find(const QDateTime &timestamp);
+
+public slots:
+    void clear();
+    void fetchLogs();
 
 signals:
     void engineChanged();
     void sampleRateChanged();
-    void fetchPowerBalanceChanged();
-    void thingIdsChanged();
     void startTimeChanged();
     void endTimeChanged();
     void liveChanged();
@@ -91,34 +101,40 @@ signals:
     void loadingInhibitedChanged();
 
     void countChanged();
-    void entryAdded(EnergyLogEntry *entry);
-    void entriesAdded(const QList<EnergyLogEntry*> entries);
+    void entryAdded(int index, EnergyLogEntry *entry);
+    void entriesAdded(int index, const QList<EnergyLogEntry*> entries);
+    void entriesRemoved(int index, int count);
+
+    void minValueChanged();
+    void maxValueChanged();
 
 protected:
     virtual QString logsName() const = 0;
     virtual QVariantMap fetchParams() const;
-    virtual void logEntriesReceived(const QVariantMap &params) = 0;
+    virtual QList<EnergyLogEntry*> unpackEntries(const QVariantMap &params, double *minValue, double *maxValue) = 0;
     virtual void notificationReceived(const QVariantMap &data) = 0;
 
-    void appendEntry(EnergyLogEntry *entry);
+    void appendEntry(EnergyLogEntry *entry, double minValue, double maxValue);
     void appendEntries(const QList<EnergyLogEntry *> &entries);
 
-private slots:
+protected slots:
     void getLogsResponse(int commandId, const QVariantMap &params);
     void notificationReceivedInternal(const QVariantMap &data);
 
-    void fetchLogs();
 private:
     Engine *m_engine = nullptr;
     SampleRate m_sampleRate = SampleRate15Mins;
     bool m_fetchPowerBalance = true;
-    QList<QUuid> m_thingIds;
     QDateTime m_startTime;
     QDateTime m_endTime;
     bool m_live = true;
     bool m_fetchingData = false;
     bool m_loadingInhibited = false;
     bool m_ready = false;
+    bool m_fetchAgain = false;
+
+    double m_minValue = 0;
+    double m_maxValue = 0;
 
     QList<EnergyLogEntry*> m_list;
 };

libnymea-app/energy/powerbalancelogs.cpp

@@ -66,100 +66,14 @@ PowerBalanceLogs::PowerBalanceLogs(QObject *parent) : EnergyLogs(parent)
 
 }
 
-double PowerBalanceLogs::minValue() const
-{
-    return m_minValue;
-}
-
-double PowerBalanceLogs::maxValue() const
-{
-    return m_maxValue;
-}
-
 QString PowerBalanceLogs::logsName() const
 {
     return "PowerBalanceLogs";
 }
 
-void PowerBalanceLogs::addEntry(PowerBalanceLogEntry *entry)
-{
-    if (entry->consumption() < m_minValue) {
-        m_minValue = entry->consumption();
-        emit minValueChanged();
-    }
-    if (entry->consumption() > m_maxValue) {
-        m_maxValue = entry->consumption();
-        emit maxValueChanged();
-    }
-
-    if (entry->production() < m_minValue) {
-        m_minValue = entry->production();
-        emit minValueChanged();
-    }
-    if (entry->production() > m_maxValue) {
-        m_maxValue = entry->production();
-        emit maxValueChanged();
-    }
-    if (entry->acquisition() < m_minValue) {
-        m_minValue = entry->acquisition();
-        emit minValueChanged();
-    }
-    if (entry->acquisition() > m_maxValue) {
-        m_maxValue = entry->acquisition();
-        emit maxValueChanged();
-    }
-    if (entry->storage() < m_minValue) {
-        m_minValue = entry->storage();
-        emit minValueChanged();
-    }
-    if (entry->storage() > m_maxValue) {
-        m_maxValue = entry->storage();
-        emit maxValueChanged();
-    }
-
-    appendEntry(entry);
-}
-
-EnergyLogEntry *PowerBalanceLogs::find(const QDateTime &timestamp) const
-{
-    qWarning() << "Finding log entry for timestamp:" << timestamp;
-    int oldest = 0;
-    int newest = rowCount() - 1;
-    EnergyLogEntry *entry = nullptr;
-    int step = 0;
-    while (oldest <= newest && step < rowCount()) {
-        EnergyLogEntry *oldestEntry = get(oldest);
-        EnergyLogEntry *newestEntry = get(newest);
-        int middle = (newest - oldest) / 2 + oldest;
-        EnergyLogEntry *middleEntry = get(middle);
-        qWarning() << "Oldest:" << oldestEntry->timestamp().toString() << "Middle:" << middleEntry->timestamp().toString() << "Newest:" << newestEntry->timestamp().toString() << ":" << (newest - oldest);
-        if (timestamp <= oldestEntry->timestamp()) {
-            return oldestEntry;
-        }
-        if (timestamp >= newestEntry->timestamp()) {
-            return newestEntry;
-        }
-
-        if (timestamp == middleEntry->timestamp()) {
-            return middleEntry;
-        }
-
-        if (timestamp < middleEntry->timestamp()) {
-            newest = middle;
-        } else {
-            oldest = middle;
-        }
-
-        if ((newest - oldest) <= 1) {
-            return newestEntry;
-        }
-        step++;
-    }
-    return entry;
-}
-
-void PowerBalanceLogs::logEntriesReceived(const QVariantMap &params)
+QList<EnergyLogEntry *> PowerBalanceLogs::unpackEntries(const QVariantMap &params, double *minValue, double *maxValue)
 {
+    QList<EnergyLogEntry*> ret;
     foreach (const QVariant &variant, params.value("powerBalanceLogEntries").toList()) {
         QVariantMap map = variant.toMap();
         QDateTime timestamp = QDateTime::fromSecsSinceEpoch(map.value("timestamp").toLongLong());
@@ -172,10 +86,13 @@ void PowerBalanceLogs::logEntriesReceived(const QVariantMap &params)
         double totalAcquisition = map.value("totalAcquisition").toDouble();
         double totalReturn = map.value("totalReturn").toDouble();
         PowerBalanceLogEntry *entry = new PowerBalanceLogEntry(timestamp, consumption, production, acquisition, storage, totalConsumption, totalProduction, totalAcquisition, totalReturn, this);
-//        qCritical() << "Adding entry:" << entry->timestamp() << entry->totalConsumption();
 
-        addEntry(entry);
+        *minValue = qMin(qMin(qMin(qMin(*minValue, consumption), production), acquisition), storage);
+        *maxValue = qMax(qMax(qMax(qMax(*maxValue, consumption), production), acquisition), storage);
+
+        ret.append(entry);
     }
+    return ret;
 }
 
 void PowerBalanceLogs::notificationReceived(const QVariantMap &data)
@@ -202,7 +119,9 @@ void PowerBalanceLogs::notificationReceived(const QVariantMap &data)
         double totalAcquisition = map.value("totalAcquisition").toDouble();
         double totalReturn = map.value("totalReturn").toDouble();
         PowerBalanceLogEntry *entry = new PowerBalanceLogEntry(timestamp, consumption, production, acquisition, storage, totalConsumption, totalProduction, totalAcquisition, totalReturn, this);
-        addEntry(entry);
+        double minValue = qMin(qMin(qMin(consumption, production), acquisition), storage);
+        double maxValue = qMax(qMax(qMax(consumption, production), acquisition), storage);
+        appendEntry(entry, minValue, maxValue);
     }
 }
 

libnymea-app/energy/powerbalancelogs.h

@@ -46,30 +46,13 @@ private:
 class PowerBalanceLogs : public EnergyLogs
 {
     Q_OBJECT
-    Q_PROPERTY(double minValue READ minValue NOTIFY minValueChanged)
-    Q_PROPERTY(double maxValue READ maxValue NOTIFY maxValueChanged)
 public:
     explicit PowerBalanceLogs(QObject *parent = nullptr);
 
-    double minValue() const;
-    double maxValue() const;
-
-    Q_INVOKABLE EnergyLogEntry* find(const QDateTime &timestamp) const;
-
-signals:
-    void minValueChanged();
-    void maxValueChanged();
-
 protected:
     QString logsName() const override;
-    void logEntriesReceived(const QVariantMap &params) override;
+    QList<EnergyLogEntry*> unpackEntries(const QVariantMap &params, double *minValue, double *maxValue) override;
     void notificationReceived(const QVariantMap &data) override;
-
-private:
-    void addEntry(PowerBalanceLogEntry *entry);
-
-    double m_minValue = 0;
-    double m_maxValue = 0;
 };
 
 

libnymea-app/energy/thingpowerlogs.cpp

@@ -2,6 +2,9 @@
 
 #include <QMetaEnum>
 
+#include <QLoggingCategory>
+Q_DECLARE_LOGGING_CATEGORY(dcEnergyLogs)
+
 ThingPowerLogEntry::ThingPowerLogEntry(QObject *parent):
     EnergyLogEntry(parent)
 {
@@ -39,67 +42,46 @@ double ThingPowerLogEntry::totalProduction() const
 
 ThingPowerLogs::ThingPowerLogs(QObject *parent) : EnergyLogs(parent)
 {
-    m_cacheTimer.setInterval(2000);
-    connect(&m_cacheTimer, &QTimer::timeout, this, [=](){
-        if (m_cachedEntries.count() > 0) {
-            addEntries(m_cachedEntries);
-            m_cachedEntries.clear();
+}
+
+QUuid ThingPowerLogs::thingId() const
+{
+    return m_thingId;
+}
+
+void ThingPowerLogs::setThingId(const QUuid &thingId)
+{
+    if (m_thingId != thingId) {
+        m_thingId = thingId;
+        emit thingIdChanged();
+        if (m_loader) {
+            m_loader->addThingId(thingId);
         }
-    });
+    }
 }
 
-QList<QUuid> ThingPowerLogs::thingIds() const
+ThingPowerLogsLoader *ThingPowerLogs::loader() const
 {
-    return m_thingIds;
+    return m_loader;
 }
 
-void ThingPowerLogs::setThingIds(const QList<QUuid> &thingIds)
+void ThingPowerLogs::setLoader(ThingPowerLogsLoader *loader)
 {
-    if (m_thingIds != thingIds) {
-        m_thingIds = thingIds;
-        emit thingIdsChanged();
+    if (m_loader != loader) {
+        m_loader = loader;
+        emit loaderChanged();
+
+        loader->addThingId(m_thingId);
+        connect(loader, &ThingPowerLogsLoader::fetched, this, [=](int commandId, const QVariantMap &params){
+            qCDebug(dcEnergyLogs()) << "Loader fetched data.";
+            getLogsResponse(commandId, params);
+        });
     }
 }
 
-double ThingPowerLogs::minValue() const
+ThingPowerLogEntry *ThingPowerLogs::liveEntry()
 {
-    return m_minValue;
-}
-
-double ThingPowerLogs::maxValue() const
-{
-    return m_maxValue;
-}
-
-ThingPowerLogEntry *ThingPowerLogs::find(const QUuid &thingId, const QDateTime &timestamp)
-{
-    // TODO: Can we do a binary search even if they key we're looking for is not unique (but still sorted)?
-    // For now, 365 * consumers items is the max we'll have here which seems on the edge for doing a stupid linear search...
-//    qWarning() << "Finding item for" << thingId.toString() << timestamp.toString();
-    for (int i = rowCount() - 1; i >= 0; i--) {
-        ThingPowerLogEntry *entry = static_cast<ThingPowerLogEntry*>(get(i));
-        if (entry->thingId() != thingId) {
-            continue;
-        }
-//        qWarning() << "comparing" << entry->timestamp().toString();
-        if (timestamp == entry->timestamp()) {
-            return entry;
-        }
-        if (timestamp > entry->timestamp()) {
-            return nullptr; // Giving up, entry is not here
-        }
-    }
-    return nullptr;
-}
-
-ThingPowerLogEntry *ThingPowerLogs::liveEntry(const QUuid &thingId)
-{
-    return m_liveEntries.value(thingId);
-}
-
-void ThingPowerLogs::addEntry(ThingPowerLogEntry *entry)
-{
-    appendEntry(entry);
+    return m_liveEntry;
 }
 
 void ThingPowerLogs::addEntries(const QList<ThingPowerLogEntry *> &entries)
@@ -128,32 +110,33 @@ QString ThingPowerLogs::logsName() const
 
 QVariantMap ThingPowerLogs::fetchParams() const
 {
-    QVariantList thingIdsStrings;
-    foreach (const QUuid &id, m_thingIds) {
-        thingIdsStrings.append(id.toString());
-    }
     QVariantMap ret;
-    ret.insert("thingIds", thingIdsStrings);
+    ret.insert("thingIds", QVariantList{m_thingId});
     ret.insert("includeCurrent", true);
     return ret;
 }
 
-void ThingPowerLogs::logEntriesReceived(const QVariantMap &params)
+QList<EnergyLogEntry *> ThingPowerLogs::unpackEntries(const QVariantMap &params, double *minValue, double *maxValue)
 {
     foreach (const QVariant &variant, params.value("currentEntries").toList()) {
         QVariantMap map = variant.toMap();
-        ThingPowerLogEntry *entry = unpack(map);
-        if (m_liveEntries.contains(entry->thingId())) {
-            m_liveEntries[entry->thingId()]->deleteLater();
+        if (map.value("thingId").toUuid() != m_thingId) {
+            continue;
         }
-        m_liveEntries[entry->thingId()] = entry;
-        emit liveEntryChanged(entry);
+        if (m_liveEntry) {
+            m_liveEntry->deleteLater();
+        }
+        m_liveEntry = unpack(map);
+        emit liveEntryChanged(m_liveEntry);
+        break;
     }
 
-    // Grouping them so when the UI gets entriesAdded, the whole set for this timstamp will be available at once
-    QList<ThingPowerLogEntry*> groupForTimestamp;
+    QList<EnergyLogEntry*> ret;
     foreach (const QVariant &variant, params.value("thingPowerLogEntries").toList()) {
         QVariantMap map = variant.toMap();
+        if (map.value("thingId").toUuid() != m_thingId) {
+            continue;
+        }
         QDateTime timestamp = QDateTime::fromSecsSinceEpoch(map.value("timestamp").toLongLong());
         QUuid thingId = map.value("thingId").toUuid();
         double currentPower = map.value("currentPower").toDouble();
@@ -162,21 +145,13 @@ void ThingPowerLogs::logEntriesReceived(const QVariantMap &params)
         ThingPowerLogEntry *entry = new ThingPowerLogEntry(timestamp, thingId, currentPower, totalConsumption, totalProduction, this);
 //        qWarning() << "Adding entry:" << entry->thingId() << entry->timestamp().toString() << entry->totalConsumption();
 
-        if (groupForTimestamp.isEmpty()) {
-            groupForTimestamp.append(entry);
-        } else if (groupForTimestamp.first()->timestamp() == timestamp) {
-            groupForTimestamp.append(entry);
-        } else {
-            // Finalize previous group and start a new one
-            addEntries(groupForTimestamp);
-            groupForTimestamp.clear();
-            groupForTimestamp.append(entry);
-        }
+        *minValue = qMin(*minValue, currentPower);
+        *maxValue = qMax(*maxValue, currentPower);
+
+        ret.append(entry);
     }
 
-    if (!groupForTimestamp.isEmpty()) {
-        addEntries(groupForTimestamp);
-    }
+    return ret;
 }
 
 void ThingPowerLogs::notificationReceived(const QVariantMap &data)
@@ -189,52 +164,193 @@ void ThingPowerLogs::notificationReceived(const QVariantMap &data)
     QVariantMap entryMap = params.value("thingPowerLogEntry").toMap();
     QUuid thingId = entryMap.value("thingId").toUuid();
 
-    if (!m_thingIds.isEmpty() && !m_thingIds.contains(thingId)) {
+    if (m_thingId != thingId) {
         // Not watching this thing...
         return;
     }
 
+    if (sampleRate != this->sampleRate()) {
+        return;
+    }
+
     // We'll use 1 Min samples in any case for the live value
     if (sampleRate == EnergyLogs::SampleRate1Min) {
         ThingPowerLogEntry *liveEntry = unpack(params.value("thingPowerLogEntry").toMap());
-        if (m_liveEntries.contains(thingId)) {
-            m_liveEntries.value(thingId)->deleteLater();
+        if (m_liveEntry) {
+            m_liveEntry->deleteLater();
         }
-        m_liveEntries[thingId] = liveEntry;
+        m_liveEntry = liveEntry;
         emit liveEntryChanged(liveEntry);
     }
 
-    // And append the sample rate we're interested in
-    if (sampleRate != this->sampleRate()) {
-        return;
-    }
-
     if (notification == "Energy.ThingPowerLogEntryAdded") {
         QVariantMap map = params.value("thingPowerLogEntry").toMap();
         QDateTime timestamp = QDateTime::fromSecsSinceEpoch(map.value("timestamp").toLongLong());
         QUuid thingId = map.value("thingId").toUuid();
-        if (!m_thingIds.isEmpty() && !m_thingIds.contains(thingId)) {
-            return;
-        }
         double currentPower = map.value("currentPower").toDouble();
         double totalConsumption = map.value("totalConsumption").toDouble();
         double totalProduction = map.value("totalProduction").toDouble();
         ThingPowerLogEntry *entry = new ThingPowerLogEntry(timestamp, thingId, currentPower, totalConsumption, totalProduction, this);
-
-        // In order to be easier on resources, we'll batch notifications by grouping them by timestamp
-        // While the timestamp is the same, just cache the changes. Once the timestamp changes, we'll finalize the
-        // batch and actually append them.
-        // Also if we're not getting any more notification for a while and still have cached entries, we'll process the batch
-        if (m_cachedEntries.isEmpty()) {
-            m_cachedEntries.append(entry);
-        } else if (entry->timestamp() == m_cachedEntries.first()->timestamp()) {
-            m_cachedEntries.append(entry);
-        } else {
-            addEntries(m_cachedEntries);
-            m_cachedEntries.clear();
-            m_cachedEntries.append(entry);
-        }
-        m_cacheTimer.start();
+        appendEntry(entry, currentPower, currentPower);
     }
 }
 
+
+ThingPowerLogsLoader::ThingPowerLogsLoader(QObject *parent):
+    QObject(parent)
+{
+
+}
+
+Engine *ThingPowerLogsLoader::engine() const
+{
+    return m_engine;
+}
+
+void ThingPowerLogsLoader::setEngine(Engine *engine)
+{
+    if (m_engine != engine) {
+        m_engine = engine;
+        emit engineChanged();
+
+        if (!m_engine) {
+            return;
+        }
+
+        connect(engine, &Engine::destroyed, this, [=](){
+            if (engine == m_engine) {
+                m_engine = nullptr;
+                emit engineChanged();
+            }
+        });
+    }
+}
+
+EnergyLogs::SampleRate ThingPowerLogsLoader::sampleRate() const
+{
+    return m_sampleRate;
+}
+
+void ThingPowerLogsLoader::setSampleRate(EnergyLogs::SampleRate sampleRate)
+{
+    if (m_sampleRate != sampleRate) {
+        m_sampleRate = sampleRate;
+        emit sampleRateChanged();
+
+        m_lastStartTime = QDateTime();
+        m_lastEndTime = QDateTime();
+    }
+}
+
+QDateTime ThingPowerLogsLoader::startTime() const
+{
+    return m_startTime;
+}
+
+void ThingPowerLogsLoader::setStartTime(const QDateTime &startTime)
+{
+    if (m_startTime != startTime) {
+        m_startTime = startTime;
+        emit startTimeChanged();
+    }
+}
+
+QDateTime ThingPowerLogsLoader::endTime() const
+{
+    return m_endTime;
+}
+
+void ThingPowerLogsLoader::setEndTime(const QDateTime &endTime)
+{
+    if (m_endTime != endTime) {
+        m_endTime = endTime;
+        emit endTimeChanged();
+    }
+}
+
+bool ThingPowerLogsLoader::fetchingData() const
+{
+    return m_fetchingData;
+}
+
+void ThingPowerLogsLoader::addThingId(const QUuid &thingId)
+{
+    if (!m_thingIds.contains(thingId)) {
+        m_thingIds.append(thingId);
+    }
+}
+
+void ThingPowerLogsLoader::fetchLogs()
+{
+    if (!m_engine || m_engine->jsonRpcClient()->experiences().value("Energy").toString() < "1.0") {
+        return;
+    }
+
+    if (m_fetchingData) {
+        qCDebug(dcEnergyLogs()) << "Already busy.. queing up call";
+        m_fetchAgain = true;
+        return;
+    }
+
+    QVariantMap params;
+    QVariantList thingIds;
+    foreach (const QUuid &thingId, m_thingIds) {
+        thingIds.append(thingId);
+    }
+    params.insert("thingIds", thingIds);
+    params.insert("includeCurrent", true);
+
+    QMetaEnum metaEnum = QMetaEnum::fromType<EnergyLogs::SampleRate>();
+    params.insert("sampleRate", metaEnum.valueToKey(m_sampleRate));
+
+    if (!m_startTime.isNull() && !m_endTime.isNull()) {
+        QDateTime startTime;
+        QDateTime endTime;
+        if (m_lastStartTime.isNull() || m_lastEndTime.isNull()) {
+            startTime = m_startTime;
+            endTime = m_endTime;
+            m_lastStartTime = m_startTime;
+            m_lastEndTime = m_endTime;
+        } else {
+            if (m_startTime < m_lastStartTime) {
+                startTime = m_startTime;
+                endTime = m_lastStartTime;
+                m_lastStartTime = m_startTime;
+            } else if (m_lastEndTime < m_endTime) {
+                startTime = m_lastEndTime;
+                endTime = m_endTime;
+                m_lastEndTime = m_endTime;
+            } else {
+                // Nothing to do...
+                m_fetchingData = false;
+                emit fetchingDataChanged();
+                return;
+            }
+
+        }
+
+        params.insert("from", startTime.toSecsSinceEpoch());
+        params.insert("to", endTime.addSecs(-1).toSecsSinceEpoch());
+        qCDebug(dcEnergyLogs()) << "Fetching from" << startTime.toString() << "to" << endTime.toString() << "with sample rate" << m_sampleRate;
+    }
+
+    m_fetchingData = true;
+    fetchingDataChanged();
+
+    m_engine->jsonRpcClient()->sendCommand("Energy.GetThingPowerLogs", params, this, "getLogsResponse");
+}
+
+void ThingPowerLogsLoader::getLogsResponse(int commandId, const QVariantMap &params)
+{
+    qCDebug(dcEnergyLogs()) << "Logs loader response!";
+    emit fetched(commandId, params);
+
+    m_fetchingData = false;
+
+    if (m_fetchAgain) {
+        m_fetchAgain = false;
+        fetchLogs();
+    } else {
+        emit fetchingDataChanged();
+    }
+}

libnymea-app/energy/thingpowerlogs.h

@@ -29,53 +29,98 @@ private:
     double m_totalProduction = 0;
 };
 
+class ThingPowerLogsLoader;
+
 class ThingPowerLogs : public EnergyLogs
 {
     Q_OBJECT
-    Q_PROPERTY(QList<QUuid> thingIds READ thingIds WRITE setThingIds NOTIFY thingIdsChanged)
-    Q_PROPERTY(double minValue READ minValue NOTIFY minValueChanged)
-    Q_PROPERTY(double maxValue READ maxValue NOTIFY maxValueChanged)
+    Q_PROPERTY(QUuid thingId READ thingId WRITE setThingId NOTIFY thingIdChanged)
+    Q_PROPERTY(ThingPowerLogsLoader* loader READ loader WRITE setLoader NOTIFY loaderChanged)
 public:
     explicit ThingPowerLogs(QObject *parent = nullptr);
 
-    QList<QUuid> thingIds() const;
-    void setThingIds(const QList<QUuid> &thingIds);
+    QUuid thingId() const;
+    void setThingId(const QUuid &thingId);
 
-    double minValue() const;
-    double maxValue() const;
+    ThingPowerLogsLoader *loader() const;
+    void setLoader(ThingPowerLogsLoader *loader);
 
-    Q_INVOKABLE ThingPowerLogEntry *find(const QUuid &thingId, const QDateTime &timestamp);
-
-    Q_INVOKABLE ThingPowerLogEntry *liveEntry(const QUuid &thingId);
+    Q_INVOKABLE ThingPowerLogEntry *liveEntry();
 
 signals:
-    void thingIdsChanged();
-
-    void minValueChanged();
-    void maxValueChanged();
-
-    void liveEntryChanged(ThingPowerLogEntry *entry);
+    void thingIdChanged();
+    void loaderChanged();
+    void liveEntryChanged(ThingPowerLogEntry *liveEntry);
 
 protected:
     QString logsName() const override;
     QVariantMap fetchParams() const override;
-    void logEntriesReceived(const QVariantMap &params) override;
+    QList<EnergyLogEntry*> unpackEntries(const QVariantMap &params, double *minValue, double *maxValue) override;
     void notificationReceived(const QVariantMap &data) override;
 
 private:
-    void addEntry(ThingPowerLogEntry *entry);
     void addEntries(const QList<ThingPowerLogEntry *> &entries);
 
     ThingPowerLogEntry *unpack(const QVariantMap &map);
 
+    QUuid m_thingId;
+    ThingPowerLogEntry* m_liveEntry = nullptr;
+    ThingPowerLogsLoader* m_loader = nullptr;
+};
+
+class ThingPowerLogsLoader: public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(Engine *engine READ engine WRITE setEngine NOTIFY engineChanged)
+    Q_PROPERTY(EnergyLogs::SampleRate sampleRate READ sampleRate WRITE setSampleRate NOTIFY sampleRateChanged)
+    Q_PROPERTY(QDateTime startTime READ startTime WRITE setStartTime NOTIFY startTimeChanged)
+    Q_PROPERTY(QDateTime endTime READ endTime WRITE setEndTime NOTIFY endTimeChanged)
+    Q_PROPERTY(bool fetchingData READ fetchingData NOTIFY fetchingDataChanged)
+
+public:
+    ThingPowerLogsLoader(QObject *parent = nullptr);
+
+    Engine *engine() const;
+    void setEngine(Engine *engine);
+
+    EnergyLogs::SampleRate sampleRate() const;
+    void setSampleRate(EnergyLogs::SampleRate sampleRate);
+
+    QDateTime startTime() const;
+    void setStartTime(const QDateTime &startTime);
+
+    QDateTime endTime() const;
+    void setEndTime(const QDateTime &endTime);
+
+    bool fetchingData() const;
+
+    void addThingId(const QUuid &thingId);
+
+public slots:
+    void fetchLogs();
+
+signals:
+    void engineChanged();
+    void sampleRateChanged();
+    void startTimeChanged();
+    void endTimeChanged();
+    void fetchingDataChanged();
+    void fetched(int commandId, const QVariantMap &params);
+
+private slots:
+    void getLogsResponse(int commandId, const QVariantMap &params);
+
+private:
+    Engine *m_engine = nullptr;
+    EnergyLogs::SampleRate m_sampleRate = EnergyLogs::SampleRate15Mins;
+    QDateTime m_startTime;
+    QDateTime m_endTime;
     QList<QUuid> m_thingIds;
-    double m_minValue = 0;
-    double m_maxValue = 0;
+    bool m_fetchingData = false;
+    bool m_fetchAgain = false;
+    QDateTime m_lastStartTime;
+    QDateTime m_lastEndTime;
 
-    QList<ThingPowerLogEntry*> m_cachedEntries;
-    QTimer m_cacheTimer;
-
-    QHash<QUuid, ThingPowerLogEntry*> m_liveEntries;
 };
 
 #endif // THINGPOWERLOGS_H

libnymea-app/libnymea-app-core.h

@@ -383,6 +383,7 @@ void registerQmlTypes() {
     qmlRegisterType<PowerBalanceLogEntry>(uri, 1, 0, "PowerBalanceLogEntry");
     qmlRegisterType<ThingPowerLogEntry>(uri, 1, 0, "ThingPowerLogEntry");
     qmlRegisterType<ThingPowerLogs>(uri, 1, 0, "ThingPowerLogs");
+    qmlRegisterType<ThingPowerLogsLoader>(uri, 1, 0, "ThingPowerLogsLoader");
 
     qmlRegisterType<SortFilterProxyModel>(uri, 1, 0, "SortFilterProxyModel");
 }

nymea-app/resources.qrc

@@ -280,5 +280,6 @@
         <file>ui/system/zwave/ZWaveAddNetworkPage.qml</file>
         <file>ui/system/zwave/ZWaveNetworkPage.qml</file>
         <file>ui/system/zwave/ZWaveNetworkSettingsPage.qml</file>
+        <file>ui/components/ActivityIndicator.qml</file>
     </qresource>
 </RCC>

nymea-app/ui/components/ActivityIndicator.qml

@@ -0,0 +1,52 @@
+import QtQuick 2.0
+import Nymea 1.0
+
+Item {
+    id: root
+    property color color: Style.iconColor
+    implicitWidth: Style.iconSize
+    implicitHeight: Style.iconSize
+
+    property int dotSize: width / 6
+
+    property bool running: true
+
+    Grid {
+        id: grid
+        columns: 3
+        anchors.fill: parent
+        spacing: (width - columns * root.dotSize) / (columns - 1)
+
+        Repeater {
+            id: dotRepeater
+            model: Math.pow(grid.columns, 2)
+            delegate: Rectangle {
+                id: dot
+                width: root.dotSize
+                height: width
+                color: root.color
+                property int duration: 400
+                property int row: Math.floor(index / grid.columns)
+                property int pause: row * 200
+
+                SequentialAnimation {
+                    running: root.running && root.visible
+                    loops: Animation.Infinite
+                    PauseAnimation { duration: dot.pause }
+                    NumberAnimation {
+                        target: dot
+                        property: "opacity"
+                        from: 0.2; to: 1;
+                        duration: dot.duration
+                    }
+                    NumberAnimation {
+                        target: dot
+                        property: "opacity"
+                        from: 1; to: 0.2;
+                        duration: dot.duration
+                    }
+                }
+            }
+        }
+    }
+}

nymea-app/ui/components/SelectionTabs.qml

@@ -13,6 +13,8 @@ Rectangle {
     property alias model: repeater.model
     readonly property var currentValue: model.hasOwnProperty("get") ? model.get(currentIndex) : model[currentIndex]
 
+    signal tabSelected(int index)
+
 
     Rectangle {
         x: repeater.count > 0 ? repeater.itemAt(root.currentIndex).x + 1 : 0
@@ -45,6 +47,7 @@ Rectangle {
                     onClicked: {
                         print("current index:", index)
                         root.currentIndex = index
+                        root.tabSelected(index)
                     }
                 }
             }

nymea-app/ui/mainviews/EnergyView.qml

@@ -150,14 +150,6 @@ MainViewBase {
                     animationsEnabled: Qt.application.active && root.isCurrentItem
                 }
 
-//                ConsumersBarChart {
-//                    Layout.fillWidth: true
-//                    Layout.preferredHeight: width
-//                    energyManager: energyManager
-//                    visible: consumers.count > 0
-//                    colors: root.thingColors
-//                    consumers: consumers
-//                }
                 ConsumersHistory {
                     Layout.fillWidth: true
                     Layout.preferredHeight: width

nymea-app/ui/mainviews/energy/ConsumerStats.qml

@@ -13,229 +13,156 @@ StatsBase {
 
     property ThingsProxy consumers: null
 
-    Connections {
-        target: consumers
-        onCountChanged: root.update()
-    }
+    QtObject {
+        id: d
 
-    Connections {
-        target: engine.thingManager
-        onFetchingDataChanged: root.update()
-    }
-    Connections {
-        target: engine.tagsManager
-        onBusyChanged: root.update()
-    }
+        property var config: root.configs[selectionTabs.currentValue.config]
 
-    function update() {
-        if (engine.thingManager.fetchingData || engine.tagsManager.busy || selectionTabs.currentValue === undefined) {
-            return
+        property int startOffset: 0
+
+        property date startTime: root.calculateTimestamp(config.startTime(), config.sampleRate, startOffset)
+        property date endTime: root.calculateTimestamp(config.startTime(), config.sampleRate, startOffset + config.count)
+
+        property bool fetchPending: false
+        property bool loading: d.fetchPending || wheelStopTimer.running || logsLoader.fetchingData
+
+        onConfigChanged: {
+            for (var i = 0; i < consumersRepeater.count; i++) {
+                consumersRepeater.itemAt(i).refreshLabels()
+            }
+
+            valueAxis.max = 1
         }
-        powerLogs.loadingInhibited = true
 
-        var thingIds = []
-        for (var i = 0; i < consumers.count; i++) {
-            thingIds.push(consumers.get(i).id)
+        onLoadingChanged: {
+            if (!loading) {
+                refresh()
+            }
         }
-        powerLogs.thingIds = thingIds
 
-        var config = root.configs[selectionTabs.currentValue.config]
-//                print("config:", config.startTime(), config.sampleList(), config.sampleListNames())
-
-        powerLogs.sampleRate = config.sampleRate
-        powerLogs.startTime = new Date(config.startTime().getTime() - config.sampleRate * 60000)
-
-        chartView.reset();
-
-        powerLogs.loadingInhibited = false
+        function refresh() {
+            for (var i = 0; i < consumersRepeater.count; i++) {
+                consumersRepeater.itemAt(i).refresh()
+            }
+        }
     }
 
-    ThingPowerLogs {
-        id: powerLogs
+    ThingPowerLogsLoader {
+        id: logsLoader
         engine: _engine
-        loadingInhibited: true
-
-        property var sampleList: null
+        startTime: root.calculateTimestamp(d.startTime, d.config.sampleRate, -d.config.count)
+        endTime: root.calculateTimestamp(d.startTime, d.config.sampleRate, d.config.count)
+        sampleRate: d.config.sampleRate
 
         onFetchingDataChanged: {
             if (!fetchingData) {
-                var config = root.configs[selectionTabs.currentValue.config]
+                print("Logs fetched")
+                d.fetchPending = false
+            }
+        }
+    }
 
-                chartView.reset()
+    Repeater {
+        id: consumersRepeater
+        model: root.consumers
+        onCountChanged: {
+            if (count == root.consumers.count) {
+                logsLoader.fetchLogs();
+            }
+        }
 
-                // First grouping log entries by timestamp
-                var groupedEntries = []
-                var groupedEntry = {}
-                for (var i = powerLogs.count - 1; i >= 0; i--) {
-                    var entry = powerLogs.get(i);
-//                    print("grouping entry:", entry.timestamp, "current group entry", groupedEntry.timestamp, groupedEntry.hasOwnProperty("timestamp"))
-                    if (!groupedEntry.hasOwnProperty("timestamp")) {
-                        groupedEntry.timestamp = entry.timestamp;
-//                        print("Starting new groupentry", groupedEntry.timestamp, entry.timestamp)
-                    }
-                    if (groupedEntry.timestamp.getTime() !== entry.timestamp.getTime()) {
-                        if (groupedEntries.length > config.count) {
-                            break;
-                        }
-//                        print("finalizing grouped entry", groupedEntry.timestamp)
-                        groupedEntries.unshift(groupedEntry);
-                        groupedEntry = {
-                            timestamp: entry.timestamp
-                        }
-//                        print("Starting new groupentry", groupedEntry.timestamp, entry.timestamp)
-                    }
-                    groupedEntry[entry.thingId] = entry.totalConsumption
-                }
-                if (groupedEntry.hasOwnProperty("timestamp") && groupedEntries.length <= config.count) {
-//                    print("finalizing grouped entry", groupedEntry.timestamp)
-                    groupedEntries.unshift(groupedEntry)
+        delegate: Item {
+            id: consumerDelegate
+            readonly property Thing thing: root.consumers.get(index)
+            property BarSet barSet: null
+
+
+            Connections {
+                target: d
+                onStartOffsetChanged: refresh()
+            }
+
+            function refreshLabels() {
+                var values = []
+                for (var i = 0; i < d.config.count; i++) {
+                    values.push(0)
                 }
+                barSet.values = values;
+            }
 
-                var labels = []
-                var entries = []
-
-                var newestLogTimestamp = powerLogs.count > 0 ? powerLogs.get(powerLogs.count - 1).timestamp : new Date();
-
-                for (var i = 0; i < config.count; i++) {
-                    var groupedEntry = groupedEntries[groupedEntries.length - i - 1]
-//                    print("have grouped entry:", groupedEntry ? groupedEntry.timestamp : "null")
-
-                    // if it's the first, let's add a generated entry which shows the total from the newest log to the current live value
-                    if (i == 0) {
-                        var liveEntry = {}
-                        for (var j = 0; j < consumers.count; j++) {
-                            var consumer = consumers.get(j)
-                            var liveLogEntry = powerLogs.liveEntry(consumer.id)
-//                            print("Got consumer:", consumer.id, consumer.name, liveLogEntry ? liveLogEntry.timestamp : "-")
-                            var value = liveLogEntry ? liveLogEntry.totalConsumption : 0;
-                            if (groupedEntry) {
-                                value -= groupedEntry.hasOwnProperty(consumer.id) ? groupedEntry[consumer.id] : 0
-                            }
-                            liveEntry[consumer.id] = value
-                            valueAxis.adjustMax(value)
+            function refresh() {
+                var upcomingTimestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.config.count)
+//                print("refreshing", consumerDelegate.thing.name ,"config start", d.config.startTime(), "upcoming:", upcomingTimestamp, "fetchPending", d.fetchPending, d.loading)
+                for (var i = 0; i < d.config.count; i++) {
+                    var timestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + i + 1)
+                    var previousTimestamp = root.calculateTimestamp(timestamp, d.config.sampleRate, -1)
+//                    print("timestamp:", timestamp, "previous:", previousTimestamp)
+                    var entry = thingPowerLogs.find(timestamp)
+                    var previousEntry = thingPowerLogs.find(previousTimestamp);
+                    if (entry && (previousEntry || !d.loading)) {
+//                        print("found entry:", entry.timestamp, previousEntry)
+                        var consumption = entry.totalConsumption
+                        if (previousEntry) {
+                            consumption -= previousEntry.totalConsumption
                         }
+                        barSet.replace(i, consumption)
+                        valueAxis.adjustMax(consumption)
 
-//                        print("Adding live entry", JSON.stringify(liveEntry))
-                        entries.unshift(liveEntry)
-                    }
-
-                    // Add the actual entry
-                    var graphEntry = {}
-                    var labelTime = new Date();
-
-                    if (groupedEntry) {
-                        var previousGroupedEntry = groupedEntries[groupedEntries.length - i - 2]
-                        for (var j = 0; j < consumers.count; j++) {
-                            var consumer = consumers.get(j)
-                            var value = groupedEntry.hasOwnProperty(consumer.id) ? groupedEntry[consumer.id] : 0
-                            if (previousGroupedEntry) {
-                                var previousValue = previousGroupedEntry.hasOwnProperty(consumer.id) ? previousGroupedEntry[consumer.id] : 0
-                                value -= previousValue
-                            }
-                            graphEntry[consumer.id] = value
-                            valueAxis.adjustMax(value)
+                    } else if (timestamp.getTime() == upcomingTimestamp.getTime() && (previousEntry || !d.loading)) {
+                        var consumption = thingPowerLogs.liveEntry().totalConsumption
+//                        print("it's today for thing", thing.name, consumption, previousEntry)
+                        if (previousEntry) {
+//                            print("previous timestamp", previousEntry.timestamp, previousEntry.totalConsumption)
+                            consumption -= previousEntry.totalConsumption
                         }
-                        labelTime = groupedEntry.timestamp
+                        barSet.replace(i, consumption)
+                        valueAxis.adjustMax(consumption)
                     } else {
-                        for (var j = 0; j < consumers.count; j++) {
-                            var consumer = consumers.get(j)
-                            graphEntry[consumer.id] = 0
-                        }
-                        labelTime = calculateSampleStart(newestLogTimestamp, config.sampleRate, i)
-                    }
-
-//                    print("Adding entry:", labelTime, config.toLabel(labelTime), JSON.stringify(graphEntry))
-                    entries.unshift(graphEntry)
-                    labels.unshift(labelTime)
-
-                    // Given we've added 2 entries for the first run but only one label, we'll add the missing label
-                    // at the end. This will shift the labels by one entries but that's ok because the logs timestamp
-                    // is when the sample was created, but for the user it's better to show the the consumption values
-                    // *during* that sample, not *before* the sample
-                    if (i == config.count - 1) {
-                        labelTime = new Date(labelTime.getTime() - config.sampleRate * 60000)
-//                            print("Adding oldest entry label", labelTime, config.sampleRate, config.toLabel(labelTime))
-                        labels.unshift(labelTime)
-                    }
-
-                }
-
-//                print("assigning categories:", labels)
-                categoryAxis.timestamps = labels
-
-                for (var i = 0; i < entries.length; i++) {
-                    var entry = entries[i]
-//                    print("Adding entry", JSON.stringify(entry))
-                    for (var j = 0; j < consumers.count; j++) {
-                        var consumer = consumers.get(j)
-                        barSeries.thingBarSetMap[consumer.id].append(entry[consumer.id])
+                        barSet.replace(i, 0)
                     }
                 }
             }
-        }
 
-        onEntriesAdded: {
-            if (fetchingData) {
-                return
+            readonly property ThingPowerLogs logs: ThingPowerLogs {
+                id: thingPowerLogs
+                engine: _engine
+                startTime: root.calculateTimestamp(d.startTime, d.config.sampleRate, -d.config.count)
+                endTime: root.calculateTimestamp(d.startTime, d.config.sampleRate, d.config.count)
+                thingId: consumerDelegate.thing.id
+                sampleRate: d.config.sampleRate
+                loader: logsLoader
+
+                onFetchingDataChanged: {
+                    if (fetchingData) {
+                        return;
+                    }
+                    consumerDelegate.refresh()
+                }
             }
 
-            chartView.animationOptions = ChartView.NoAnimation
+            Component.onCompleted: {
+                var values = []
+                for (var i = 0; i < d.config.count; i++) {
+                    values.push(0)
+                }
 
-            for (var i = 0; i < entries.length; i++) {
-                var entry = entries[i]
-                var thing = engine.thingManager.things.getThing(entry.thingId)
-//                print("Adding new sample. thing:", thing.name);
-//                print("Timestamp:", entry.timestamp, entry.totalConsumption)
-                // update current last
-                var barSet = barSeries.thingBarSetMap[thing.id]
-                var lastTimestamp = categoryAxis.timestamps[categoryAxis.count - 1]
-                var previous = powerLogs.find(entry.thingId, lastTimestamp)
-                var previousValue = previous ? previous.totalConsumption : 0
-//                print("previousValue:", previousValue, "newValue:", entry.totalConsumption, "diff", entry.totalConsumption - previousValue)
-                barSet.replace(barSet.count - 1, entry.totalConsumption - previousValue)
-
-                // remove the oldest
-                barSet.remove(0, 1)
-
-                // and add a new one (always 0 for a start)
-                barSet.append(0)
+                barSet = barSeries.append(consumerDelegate.thing.name, values)
+                barSet.color = NymeaUtils.generateColor(Style.generationBaseColor, index)
+                barSet.borderColor = barSet.color
+                barSet.borderWith = 0
             }
-
-            var labels = categoryAxis.timestamps
-            labels.splice(0, 1)
-            labels.push(entries[0].timestamp)
-            categoryAxis.timestamps = labels
-
-            chartView.animationOptions = NymeaUtils.chartsAnimationOptions
-        }
-
-        onLiveEntryChanged: {
-            if (powerLogs.fetchingData) {
-                return
-            }
-
-//            print("live entry changed", entry.thingId, entry.timestamp)
-            var previous = powerLogs.find(entry.thingId, new Date(categoryAxis.timestamps[categoryAxis.timestamps.length - 1]))
-            var previousValue = previous ? previous.totalConsumption : 0
-            var barSet = barSeries.thingBarSetMap[entry.thingId]
-
-            if (!barSet) {
-                return
-            }
-
-            barSet.replace(barSet.count - 1, entry.totalConsumption - previousValue)
         }
     }
 
     ColumnLayout {
         anchors.fill: parent
+        spacing: 0
 
         Label {
             Layout.fillWidth: true
             Layout.margins: Style.smallMargins
             horizontalAlignment: Text.AlignHCenter
             text: qsTr("Consumers totals")
-
         }
 
         SelectionTabs {
@@ -243,246 +170,347 @@ StatsBase {
             Layout.fillWidth: true
             Layout.leftMargin: Style.smallMargins
             Layout.rightMargin: Style.smallMargins
-            currentIndex: 0
+            currentIndex: 1
             model: ListModel {
-                Component.onCompleted: {
-                    append({modelData: qsTr("Hours"), config: "hours" })
-                    append({modelData: qsTr("Days"), config: "days" })
-                    append({modelData: qsTr("Weeks"), config: "weeks" })
-                    append({modelData: qsTr("Months"), config: "months" })
-                    append({modelData: qsTr("Years"), config: "years" })
-//                    append({modelData: qsTr("Minutes"), config: "minutes" })
-
-                    selectionTabs.currentIndex = 1
-                }
+                ListElement { modelData: qsTr("Hours"); config: "hours" }
+                ListElement { modelData: qsTr("Days"); config: "days" }
+                ListElement { modelData: qsTr("Weeks"); config: "weeks" }
+                ListElement { modelData: qsTr("Months"); config: "months" }
+                ListElement { modelData: qsTr("Years"); config: "years" }
+//                ListElement { modelData: qsTr("Minutes"); config: "minutes" }
             }
-            onCurrentValueChanged: {
-                root.update()
+            onTabSelected: {
+                d.startOffset = 0
+                logsLoader.fetchLogs();
             }
         }
 
-
-        ChartView {
-            id: chartView
+        Item {
             Layout.fillWidth: true
             Layout.fillHeight: true
 
-            //    margins.left: 0
-            margins.right: 0
-            margins.bottom: 0
-            margins.top: 0
+            Label {
+                x: chartView.x + chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                y: chartView.y + chartView.plotArea.y + Style.smallMargins
+                text: d.config.toRangeLabel(d.startTime)
+                font: Style.smallFont
+                opacity: d.startOffset < -d.config.count ? .5 : 0
+                Behavior on opacity { NumberAnimation {} }
+            }
 
-            backgroundColor: "transparent"
-            legend.alignment: Qt.AlignBottom
-            legend.font: Style.extraSmallFont
-            legend.labelColor: Style.foregroundColor
+            ChartView {
+                id: chartView
+                anchors.fill: parent
 
-            function reset() {
-                chartView.animationOptions = ChartView.NoAnimation
-                barSeries.clear();
-                valueAxis.max = 0
-                var map = {}
-                for (var j = 0; j < consumers.count; j++) {
-                    var consumer = consumers.get(j)
-                    var barSet = barSeries.append(consumer.name, [])
-//                    barSet.color = root.colors[j % root.colors.length]
-                    barSet.color = NymeaUtils.generateColor(Style.generationBaseColor, j)
-                    barSet.borderColor = barSet.color
-                    barSet.borderWith = 0
-                    map[consumer.id] = barSet
+                backgroundColor: "transparent"
+                //    margins.left: 0
+                margins.right: 0
+                margins.bottom: 0
+                margins.top: 0
+
+                legend.alignment: Qt.AlignBottom
+                legend.font: Style.extraSmallFont
+                legend.labelColor: Style.foregroundColor
+
+                ActivityIndicator {
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    visible: logsLoader.fetchingData
+                    opacity: .5
+                }
+                Label {
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    text: qsTr("No data available")
+                    opacity: {
+                        if (logsLoader.fetchingData || d.startOffset == 0) {
+                            return 0
+                        }
+                        var oldestEntry = new Date().getTime();
+                        var haveItems = false;
+                        for (var i = 0; i < consumersRepeater.count; i++) {
+                            var logsModel = consumersRepeater.itemAt(i).logs
+                            var firstEntry = logsModel.get(0)
+                            if (firstEntry) {
+                                haveItems = true;
+                                oldestEntry = Math.min(oldestEntry, firstEntry.timestamp.getTime())
+                            }
+                        }
+
+                        print("oldestEntry", new Date(oldestEntry), haveItems)
+                        if (!haveItems || oldestEntry >= d.endTime.getTime()) {
+                            return 0.5
+                        }
+                        return 0;
+                    }
+                    font: Style.smallFont
+                    Behavior on opacity { NumberAnimation {}}
+                }
+
+                Item {
+                    id: labelsLayout
+                    x: Style.smallMargins
+                    y: chartView.plotArea.y
+                    height: chartView.plotArea.height
+                    width: chartView.plotArea.x - x
+                    Repeater {
+                        model: valueAxis.tickCount
+                        delegate: Label {
+                            y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
+                            width: parent.width - Style.smallMargins
+                            horizontalAlignment: Text.AlignRight
+                            text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1)))).toFixed(1) + "kWh"
+                            verticalAlignment: Text.AlignTop
+                            font: Style.extraSmallFont
+                            color: Style.foregroundColor
+                        }
+                    }
+                }
+
+                BarSeries {
+                    id: barSeries
+                    axisX: BarCategoryAxis {
+                        id: categoryAxis
+                        labelsColor: Style.foregroundColor
+                        labelsFont: Style.extraSmallFont
+                        gridVisible: false
+                        gridLineColor: Style.tileOverlayColor
+                        lineVisible: false
+                        titleVisible: false
+                        shadesVisible: false
+
+                        categories: {
+                            var ret = []
+                            print("Updating categories from", d.config.startTime())
+                            for (var i = 0; i < d.config.count; i++) {
+                                var timestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + i);
+                                print("*** adding", timestamp, d.startOffset, i)
+                                ret.push(d.config.toLabel(timestamp))
+                            }
+                            return ret;
+                        }
+                    }
+                    axisY: ValueAxis {
+                        id: valueAxis
+                        min: 0
+                        gridLineColor: Style.tileOverlayColor
+                        labelsVisible: false
+                        labelsColor: Style.foregroundColor
+                        labelsFont: Style.extraSmallFont
+                        lineVisible: false
+                        titleVisible: false
+                        shadesVisible: false
+
+                        function adjustMax(newValue) {
+                            if (max < newValue) {
+                                max = Math.ceil(newValue)
+                            }
+                        }
+                    }
                 }
-                barSeries.thingBarSetMap = map
-                chartView.animationOptions = NymeaUtils.chartsAnimationOptions
             }
 
             Item {
-                id: labelsLayout
-                x: Style.smallMargins
-                y: chartView.plotArea.y
-                height: chartView.plotArea.height
-                width: chartView.plotArea.x - x
-                Repeater {
-                    model: valueAxis.tickCount
-                    delegate: Label {
-                        y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
-                        width: parent.width - Style.smallMargins
-                        horizontalAlignment: Text.AlignRight
-                        text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1)))).toFixed(1) + "kWh"
-                        verticalAlignment: Text.AlignTop
-                        font: Style.extraSmallFont
-                        color: Style.foregroundColor
-                    }
+                anchors.fill: parent
+                anchors.leftMargin: chartView.x + chartView.plotArea.x
+                anchors.topMargin: chartView.y + chartView.plotArea.y
+                anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
+                anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
+                z: -1
+
+                Rectangle {
+                    height: parent.height + Style.margins * 2
+                    y: -Style.smallMargins
+                    radius: Style.smallCornerRadius
+                    width: chartView.plotArea.width / categoryAxis.count
+                    color: Style.tileBackgroundColor
+                    property int idx: Math.max(0, Math.min(categoryAxis.count -1, Math.floor(mouseArea.mouseX * categoryAxis.count / mouseArea.width)))
+                    visible: toolTip.visible
+
+                    x: idx * parent.width / categoryAxis.count
+                    Behavior on x { enabled: toolTip.animationsEnabled; NumberAnimation { duration: Style.animationDuration } }
                 }
             }
 
-            BarSeries {
-                id: barSeries
-                axisX: BarCategoryAxis {
-                    id: categoryAxis
-                    labelsColor: Style.foregroundColor
-                    labelsFont: Style.extraSmallFont
-                    gridVisible: false
-                    gridLineColor: Style.tileOverlayColor
-                    lineVisible: false
-                    titleVisible: false
-                    shadesVisible: false
 
-                    categories: {
-                        var ret = []
-                        for (var i = 0; i < timestamps.length; i++) {
-                            ret.push(root.configs[selectionTabs.currentValue.config].toLabel(timestamps[i]))
-                        }
-                        return ret
-                    }
+            MouseArea {
+                id: mouseArea
+                anchors.fill: parent
+                anchors.leftMargin: chartView.x + chartView.plotArea.x
+                anchors.topMargin: chartView.y + chartView.plotArea.y
+                anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
+                anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
 
-                    property var timestamps: []
-                }
-                axisY: ValueAxis {
-                    id: valueAxis
-                    min: 0
-                    gridLineColor: Style.tileOverlayColor
-                    labelsVisible: false
-                    labelsColor: Style.foregroundColor
-                    labelsFont: Style.extraSmallFont
-                    lineVisible: false
-                    titleVisible: false
-                    shadesVisible: false
+                hoverEnabled: true
+                preventStealing: tooltipping || dragging
 
-                    function adjustMax(newValue) {
-                        if (max < newValue) {
-                            max = Math.ceil(newValue)
+                property int startMouseX: 0
+                property bool dragging: false
+                property bool tooltipping: false
+                property int dragStartOffset: 0
+
+                Timer {
+                    interval: 300
+                    running: mouseArea.pressed
+                    onTriggered: {
+                        if (!mouseArea.dragging) {
+                            mouseArea.tooltipping = true
                         }
                     }
                 }
 
-                property var thingBarSetMap: ({})
-            }
-        }
-    }
-
-    Item {
-        anchors.fill: parent
-        anchors.leftMargin: chartView.x + chartView.plotArea.x
-        anchors.topMargin: chartView.y + chartView.plotArea.y
-        anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
-        anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
-        z: -1
-
-        Rectangle {
-            height: parent.height + Style.margins * 2
-            y: -Style.smallMargins
-            radius: Style.smallCornerRadius
-            width: chartView.plotArea.width / categoryAxis.count
-            color: Style.tileBackgroundColor
-            property int idx: Math.max(0, Math.min(categoryAxis.count -1, Math.floor(mouseArea.mouseX * categoryAxis.count / mouseArea.width)))
-            visible: toolTip.visible
-
-            x: idx * parent.width / categoryAxis.count
-            Behavior on x { enabled: toolTip.animationsEnabled; NumberAnimation { duration: Style.animationDuration } }
-        }
-    }
-
-
-    MouseArea {
-        id: mouseArea
-        anchors.fill: parent
-        anchors.leftMargin: chartView.x + chartView.plotArea.x
-        anchors.topMargin: chartView.y + chartView.plotArea.y
-        anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
-        anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
-
-        hoverEnabled: true
-
-        Timer {
-            interval: 300
-            running: mouseArea.pressed
-            onTriggered: mouseArea.preventStealing = true
-        }
-        onReleased: mouseArea.preventStealing = false
-
-
-        NymeaToolTip {
-            id: toolTip
-
-            backgroundItem: chartView
-            backgroundRect: Qt.rect(chartView.plotArea.x + toolTip.x, chartView.plotArea.y + toolTip.y, toolTip.width, toolTip.height)
-
-            property int idx: Math.max(0, Math.min(categoryAxis.count -1, Math.floor(mouseArea.mouseX * categoryAxis.count / mouseArea.width)))
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-
-            property int chartWidth: chartView.plotArea.width
-            property int barWidth: chartWidth / categoryAxis.count
-            x: chartWidth - (idx * barWidth + barWidth + Style.smallMargins) > width ?
-                   idx * barWidth + barWidth + Style.smallMargins
-                 : idx * barWidth - Style.smallMargins - width
-            property double setMaxValue: {
-                var max = 0;
-                for (var i = 0; i < consumers.count; i++) {
-                    var consumer = consumers.get(i)
-                    max = barSeries.thingBarSetMap.hasOwnProperty(consumer.id) ? Math.max(max, barSeries.thingBarSetMap[consumer.id].at(idx)) : 0
-                }
-                return max
-            }
-            y: Math.min(Math.max(mouseArea.height - (setMaxValue * mouseArea.height / valueAxis.max) - height - Style.smallMargins, 0), mouseArea.height - height)
-
-            width: tooltipLayout.implicitWidth + Style.smallMargins * 2
-            height: tooltipLayout.implicitHeight + Style.smallMargins * 2
-
-            ColumnLayout {
-                id: tooltipLayout
-                anchors {
-                    left: parent.left
-                    top: parent.top
-                    margins: Style.smallMargins
-                }
-                Label {
-                    text: toolTip.idx >= 0 && categoryAxis.timestamps.length > toolTip.idx ? root.configs[selectionTabs.currentValue.config].toLongLabel(categoryAxis.timestamps[toolTip.idx]) : ""
-                    font: Style.smallFont
-                }
-
-                Repeater {
-                    model: ListModel {
-                        id: toolTipModel
-                        property var entries: {
-                            var unsorted = []
-                            for (var i = 0; i < consumers.count; i++) {
-                                var consumer = consumers.get(i)
-                                var entry = {
-                                    name: consumer.name,
-                                    value: barSeries.thingBarSetMap[consumer.id].at(toolTip.idx).toFixed(2),
-                                    indexInModel: i
-                                }
-                                unsorted.push(entry)
-                            }
-                            return unsorted
-                        }
-                        onEntriesChanged: {
-                            clear();
-                            var unsorted = entries;
-                            for (var i = 0; i < unsorted.length; i++) {
-                                var j = 0;
-                                while (j < count && get(j).value > unsorted[i].value) {
-                                    j++;
-                                }
-                                insert(j, unsorted[i])
-                            }
-                        }
+                onReleased: {
+                    if (mouseArea.dragging) {
+                        logsLoader.fetchLogs();
+                        d.refresh()
+                        mouseArea.dragging = false;
                     }
+                    mouseArea.tooltipping = false;
+                }
 
-                    delegate: RowLayout {
-                        Rectangle {
-                            width: Style.extraSmallFont.pixelSize
-                            height: width
-//                            color: root.colors[model.indexInModel % root.colors.length]
-                            color: NymeaUtils.generateColor(Style.generationBaseColor, model.indexInModel)
+                onPressed: {
+                    startMouseX = mouseX
+                    dragStartOffset = d.startOffset
+                }
+
+                onDoubleClicked: {
+                    var idx = Math.ceil(mouseArea.mouseX * d.config.count / mouseArea.width) - 1
+                    var timestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + idx)
+                    selectionTabs.currentIndex--
+                    var startTime = d.config.startTime()
+                    d.startOffset = (timestamp.getTime() - startTime.getTime()) / (d.config.sampleRate * 60 * 1000)
+                    logsLoader.fetchLogs();
+                }
+
+                onMouseXChanged: {
+                    if (!pressed || mouseArea.tooltipping) {
+                        return;
+                    }
+                    if (Math.abs(startMouseX - mouseX) < 10) {
+                        return;
+                    }
+                    dragging = true
+
+                    var dragDelta = startMouseX - mouseX
+                    var slotWidth = mouseArea.width / d.config.count
+                    var offset = Math.floor(dragDelta / slotWidth);
+                    d.startOffset = Math.min(dragStartOffset + offset, 0)
+                    d.fetchPending = true;
+                }
+
+                property int wheelDelta: 0
+                onWheel: {
+                    wheelDelta += wheel.pixelDelta.x
+                    var slotWidth = mouseArea.width / d.config.count
+                    while (wheelDelta > slotWidth) {
+                        d.startOffset--
+                        wheelDelta -= slotWidth
+                    }
+                    while (wheelDelta < -slotWidth) {
+                        d.startOffset = Math.min(d.startOffset + 1, 0)
+                        wheelDelta += slotWidth
+                    }
+                    d.fetchPending = true;
+                    wheelStopTimer.restart()
+                }
+
+                Timer {
+                    id: wheelStopTimer
+                    interval: 300
+                    repeat: false
+                    onTriggered: {
+                        logsLoader.fetchLogs()
+                        d.refresh()
+                    }
+                }
+
+                NymeaToolTip {
+                    id: toolTip
+
+                    backgroundItem: chartView
+                    backgroundRect: Qt.rect(chartView.plotArea.x + toolTip.x, chartView.plotArea.y + toolTip.y, toolTip.width, toolTip.height)
+
+                    property int idx: Math.ceil(mouseArea.mouseX * d.config.count / mouseArea.width) - 1
+                    property date timestamp: root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + idx)
+
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+
+                    property int chartWidth: chartView.plotArea.width
+                    property int barWidth: chartWidth / categoryAxis.count
+                    x: chartWidth - (idx * barWidth + barWidth + Style.smallMargins) > width ?
+                           idx * barWidth + barWidth + Style.smallMargins
+                         : idx * barWidth - Style.smallMargins - width
+                    property double setMaxValue: {
+                        var max = 0;
+                        for (var i = 0; i < consumersRepeater.count; i++) {
+                            max = Math.max(max, consumersRepeater.itemAt(i).barSet.at(idx))
+                        }
+                        return max
+                    }
+                    y: Math.min(Math.max(mouseArea.height - (setMaxValue * mouseArea.height / valueAxis.max) - height - Style.smallMargins, 0), mouseArea.height - height)
+
+                    width: tooltipLayout.implicitWidth + Style.smallMargins * 2
+                    height: tooltipLayout.implicitHeight + Style.smallMargins * 2
+
+                    ColumnLayout {
+                        id: tooltipLayout
+                        anchors {
+                            left: parent.left
+                            top: parent.top
+                            margins: Style.smallMargins
                         }
                         Label {
-                            text: "%1: %2 kWh".arg(model.name).arg(model.value)
-                            font: Style.extraSmallFont
+                            text: d.config.toLongLabel(toolTip.timestamp)
+                            font: Style.smallFont
+                        }
+
+                        Repeater {
+                            model: ListModel {
+                                id: toolTipModel
+                                property var entries: {
+                                    var unsorted = []
+                                    for (var i = 0; i < consumers.count; i++) {
+                                        var consumer = consumers.get(i)
+                                        var entry = {
+                                            name: consumer.name,
+                                            value: consumersRepeater.itemAt(i).barSet.at(toolTip.idx).toFixed(2),
+                                            indexInModel: i
+                                        }
+                                        unsorted.push(entry)
+                                    }
+                                    return unsorted
+                                }
+                                onEntriesChanged: {
+                                    clear();
+                                    var unsorted = entries;
+                                    for (var i = 0; i < unsorted.length; i++) {
+                                        var j = 0;
+                                        while (j < count && get(j).value > unsorted[i].value) {
+                                            j++;
+                                        }
+                                        insert(j, unsorted[i])
+                                    }
+                                }
+                            }
+
+                            delegate: RowLayout {
+                                Rectangle {
+                                    width: Style.extraSmallFont.pixelSize
+                                    height: width
+        //                            color: root.colors[model.indexInModel % root.colors.length]
+                                    color: NymeaUtils.generateColor(Style.generationBaseColor, model.indexInModel)
+                                }
+                                Label {
+                                    text: "%1: %2 kWh".arg(model.name).arg(model.value)
+                                    font: Style.extraSmallFont
+                                }
+                            }
                         }
                     }
                 }
             }
         }
+
     }
+
 }

nymea-app/ui/mainviews/energy/ConsumersHistory.qml

@@ -11,142 +11,62 @@ Item {
     property var colors: null
     property ThingsProxy consumers: null
 
-    Connections {
-        target: consumers
-        onCountChanged: d.updateConsumers()
-    }
-    Connections {
-        target: engine.tagsManager
-        onBusyChanged: d.updateConsumers()
-    }
-
-    ThingPowerLogs {
-        id: thingPowerLogs
+    PowerBalanceLogs {
+        id: powerBalanceLogs
         engine: _engine
-        startTime: dateTimeAxis.min
-        sampleRate: EnergyLogs.SampleRate15Mins
-        thingIds: []
-        loadingInhibited: thingIds.length === 0
-
-        onModelReset: {
-            for (var i = 0; i < consumers.count; i++) {
-                var consumer = consumers.get(i);
-                var series = d.thingsSeriesMap[consumer.id];
-                series.upperSeries.clear()
-            }
-        }
+        startTime: new Date(d.startTime.getTime() - d.range * 60000)
+        endTime: new Date(d.endTime.getTime() + d.range * 60000)
+        sampleRate: d.sampleRate
+        Component.onCompleted: fetchLogs()
 
         onEntriesAdded: {
-            var thingValues = ({})
-            var timestamp = entries[0].timestamp
+            print("entries added", index, entries.length)
             for (var i = 0; i < entries.length; i++) {
                 var entry = entries[i]
-                var thing = engine.thingManager.things.getThing(entries[i].thingId)
-                thingValues[entry.thingId] = entry.currentPower
-            }
+//                print("got entry", entry.timestamp)
 
-            // Add them in the order of the chart (same as proxy), summing it up
-            var totalValue = 0;
-            for (var i = 0; i < consumers.count; i++) {
-                var consumer = consumers.get(i);
-                var value = thingValues.hasOwnProperty(consumer.id) ? thingValues[consumer.id] : 0
-                totalValue += thingValues.hasOwnProperty(consumer.id) ? thingValues[consumer.id] : 0;
-                var series = d.thingsSeriesMap[consumer.id];
-                series.upperSeries.append(timestamp, totalValue)
+                zeroSeries.ensureValue(entry.timestamp)
+                valueAxis.adjustMax(entry.consumption)
+                consumptionSeries.insertEntry(index + i, entry)
+                if (entry.timestamp > d.now && new Date().getTime() - d.now.getTime() < 120000) {
+                    d.now = entry.timestamp
+                }
             }
-            thingPowerLogs.maxValue = Math.max(thingPowerLogs.maxValue, totalValue)
         }
 
-        property double maxValue: 0
+        onEntriesRemoved: {
+            consumptionUpperSeries.removePoints(index, count)
+            zeroSeries.shrink()
+        }
     }
 
-    property PowerBalanceLogs powerBalanceLogs: PowerBalanceLogs {
+    ThingPowerLogsLoader {
+        id: logsLoader
         engine: _engine
-        startTime: dateTimeAxis.min
-        sampleRate: EnergyLogs.SampleRate15Mins
-
-        onEntryAdded: {
-            consumptionSeries.addEntry(entry)
-
-            if (dateTimeAxis.now < entry.timestamp) {
-                dateTimeAxis.now = entry.timestamp
-                zeroSeries.update(entry.timestamp)
-            }
-        }
-    }
-
-    Timer {
-        interval: 60000
-        repeat: true
-        onTriggered: {
-            var now = new Date()
-            if (dateTimeAxis.now < now) {
-                dateTimeAxis.now = now
-                zeroSeries.update(now)
-            }
-        }
-    }
-
-    Connections {
-        target: engine.thingManager
-        onFetchingDataChanged: d.updateConsumers()
-        onThingAdded: {
-            if (thing.thingClass.interfaces.indexOf("smartmeterconsumer") >= 0) {
-                d.updateConsumers();
-            }
-        }
-    }
-
-
-    Component.onCompleted: {
-        for (var i = 0; i < powerBalanceLogs.count; i++) {
-            var entry = powerBalanceLogs.get(i);
-            consumptionSeries.addEntry(entry)
-        }
-
-        d.updateConsumers();
+        startTime: new Date(d.startTime.getTime() - d.range * 60000)
+        endTime: new Date(d.endTime.getTime() + d.range * 60000)
+        sampleRate: d.sampleRate
     }
 
     QtObject {
         id: d
-        property var thingsSeriesMap: ({})
 
-        function updateConsumers() {
-            if (engine.thingManager.fetchingData || engine.tagsManager.busy) {
-                return;
-            }
-            thingPowerLogs.loadingInhibited = true;
+        property date now: new Date()
 
-            for (var thingId in d.thingsSeriesMap) {
-                chartView.removeSeries(d.thingsSeriesMap[thingId])
-            }
-            d.thingsSeriesMap = ({})
+        readonly property int range: selectionTabs.currentValue.range
+        readonly property int sampleRate: selectionTabs.currentValue.sampleRate
+        readonly property int visibleValues: range / sampleRate
 
-            var consumerThingIds = []
-            for (var i = 0; i < consumers.count; i++) {
-                var thing = consumers.get(i);
+        readonly property var startTime: {
+            var date = new Date(now);
+            date.setTime(date.getTime() - range * 60000 + 2000);
+            return date;
+        }
 
-                var baseSeries = zeroSeries;
-                if (i > 0) {
-                    baseSeries = d.thingsSeriesMap[consumerThingIds[i-1]].upperSeries
-    //                    print("base for:", thing.name, "is", engine.thingManager.things.getThing(consumerThingIds[i-1]).name)
-                }
-
-                var series = chartView.createSeries(ChartView.SeriesTypeArea, thing.name, dateTimeAxis, valueAxis)
-                series.lowerSeries = baseSeries
-                series.upperSeries = lineSeriesComponent.createObject(series)
-//                series.color = root.colors[i % root.colors.length]
-                series.color = NymeaUtils.generateColor(Style.generationBaseColor, i)
-                series.borderWidth = 0;
-                series.borderColor = series.color
-
-                var map = d.thingsSeriesMap
-                map[thing.id] = series
-                d.thingsSeriesMap = map
-                consumerThingIds.push(thing.id)
-            }
-            thingPowerLogs.thingIds = consumerThingIds;
-            thingPowerLogs.loadingInhibited = false;
+        readonly property var endTime: {
+            var date = new Date(now);
+            date.setTime(date.getTime() + 2000)
+            return date;
         }
     }
 
@@ -155,202 +75,497 @@ Item {
         LineSeries { }
     }
 
-    ChartView {
-        id: chartView
+    ColumnLayout {
         anchors.fill: parent
+        spacing: 0
 
-        backgroundColor: "transparent"
-        margins.left: 0
-        margins.right: 0
-        margins.bottom: 0
-        margins.top: 0
-
-
-        title: qsTr("Consumers history")
-        titleColor: Style.foregroundColor
-
-        legend.alignment: Qt.AlignBottom
-        legend.labelColor: Style.foregroundColor
-        legend.font: Style.extraSmallFont
-
-        ValueAxis {
-            id: valueAxis
-            min: 0
-            max: Math.ceil(Math.max(powerBalanceLogs.maxValue, thingPowerLogs.maxValue) / 1000) * 1000
-            labelFormat: ""
-            gridLineColor: Style.tileOverlayColor
-            labelsVisible: false
-            lineVisible: false
-            titleVisible: false
-            shadesVisible: false
-            //        visible: false
+        Label {
+            Layout.fillWidth: true
+            Layout.margins: Style.smallMargins
+            horizontalAlignment: Text.AlignHCenter
+            text: qsTr("Consumers history")
+        }
 
+        SelectionTabs {
+            id: selectionTabs
+            Layout.fillWidth: true
+            Layout.leftMargin: Style.smallMargins
+            Layout.rightMargin: Style.smallMargins
+            currentIndex: 1
+            model: ListModel {
+                ListElement {
+                    modelData: qsTr("Hours")
+                    sampleRate: EnergyLogs.SampleRate1Min
+                    range: 180 // 3 Hours: 3 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Days")
+                    sampleRate: EnergyLogs.SampleRate15Mins
+                    range: 1440 // 1 Day: 24 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Weeks")
+                    sampleRate: EnergyLogs.SampleRate1Hour
+                    range: 10080 // 7 Days: 7 * 24 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Months")
+                    sampleRate: EnergyLogs.SampleRate3Hours
+                    range: 43200 // 30 Days: 30 * 24 * 60
+                }
+            }
+            onTabSelected: {
+                d.now = new Date()
+                powerBalanceLogs.fetchLogs()
+                logsLoader.fetchLogs();
+            }
         }
 
         Item {
-            id: labelsLayout
-            x: Style.smallMargins
-            y: chartView.plotArea.y
-            height: chartView.plotArea.height
-            width: chartView.plotArea.x - x
-            Repeater {
-                model: valueAxis.tickCount
-                delegate: Label {
-                    y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
-                    width: parent.width - Style.smallMargins
-                    horizontalAlignment: Text.AlignRight
-                    text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1))) / 1000).toFixed(2) + "kW"
-                    verticalAlignment: Text.AlignTop
-                    font: Style.extraSmallFont
-                }
-            }
-        }
+            Layout.fillWidth: true
+            Layout.fillHeight: true
 
-        DateTimeAxis {
-            id: dateTimeAxis
-            property date now: new Date()
-            min: {
-                var date = new Date(now);
-                date.setTime(date.getTime() - (1000 * 60 * 60 * 24) + 2000);
-                return date;
-            }
-            max: {
-                var date = new Date(now);
-                date.setTime(date.getTime() + 2000)
-                return date;
-            }
-            format: "hh:mm"
-            labelsFont: Style.extraSmallFont
-            gridVisible: false
-            minorGridVisible: false
-            lineVisible: false
-            shadesVisible: false
-            labelsColor: Style.foregroundColor
-        }
-
-        AreaSeries {
-            id: consumptionSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: Style.gray
-            borderWidth: 0
-            borderColor: color
-            name: qsTr("Unknown")
-
-            lowerSeries: LineSeries {
-                id: zeroSeries
-                XYPoint { x: dateTimeAxis.min.getTime(); y: 0 }
-                XYPoint { x: dateTimeAxis.max.getTime(); y: 0 }
-                function update(timestamp) {
-                    append(timestamp, 0);
-                    removePoints(1,1);
-                }
-            }
-            upperSeries: LineSeries {
-                id: consumptionUpperSeries
+            Label {
+                x: chartView.x + chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                y: chartView.y + chartView.plotArea.y + Style.smallMargins
+                text: d.startTime.toLocaleDateString(Qt.locale(), Locale.LongFormat)
+                font: Style.smallFont
+                opacity: ((new Date().getTime() - d.now.getTime()) / d.sampleRate / 60000) > d.visibleValues ? .5 : 0
+                Behavior on opacity { NumberAnimation {} }
             }
 
-            function addEntry(entry) {
-                consumptionUpperSeries.append(entry.timestamp.getTime(), entry.consumption)
-            }
-        }
+            ChartView {
+                id: chartView
+                anchors.fill: parent
 
-    }
+                backgroundColor: "transparent"
+                margins.left: 0
+                margins.right: 0
+                margins.bottom: 0
+                margins.top: 0
 
-    MouseArea {
-        id: mouseArea
-        anchors.fill: parent
-        anchors.leftMargin: chartView.plotArea.x
-        anchors.topMargin: chartView.plotArea.y
-        anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
-        anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
+                legend.alignment: Qt.AlignBottom
+                legend.font: Style.extraSmallFont
+                legend.labelColor: Style.foregroundColor
 
-        hoverEnabled: true
-
-        Timer {
-            interval: 300
-            running: mouseArea.pressed
-            onTriggered: mouseArea.preventStealing = true
-        }
-        onReleased: mouseArea.preventStealing = false
-
-        Rectangle {
-            height: parent.height
-            width: 1
-            color: Style.foregroundColor
-            x: Math.min(mouseArea.width - 1, Math.max(0, mouseArea.mouseX))
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-        }
-
-        NymeaToolTip {
-            id: toolTip
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-
-            backgroundItem: chartView
-            backgroundRect: Qt.rect(mouseArea.x + toolTip.x, mouseArea.y + toolTip.y, toolTip.width, toolTip.height)
-
-            property int idx: consumptionUpperSeries.count - Math.floor(mouseArea.mouseX * consumptionUpperSeries.count / mouseArea.width)
-            property int seriesIndex: Math.min(consumptionUpperSeries.count - 1, Math.max(0, consumptionUpperSeries.count - idx))
-
-            property int xOnRight: Math.max(0, mouseArea.mouseX) + Style.smallMargins
-            property int xOnLeft: Math.min(mouseArea.width, mouseArea.mouseX) - Style.smallMargins - width
-            x: xOnRight + width < mouseArea.width ? xOnRight : xOnLeft
-            property double maxValue: consumptionUpperSeries.at(seriesIndex).y
-            y: Math.min(Math.max(mouseArea.height - (maxValue * mouseArea.height / valueAxis.max) - height - Style.margins, 0), mouseArea.height - height)
-
-            width: tooltipLayout.implicitWidth + Style.smallMargins * 2
-            height: tooltipLayout.implicitHeight + Style.smallMargins * 2
-
-            property date timestamp: new Date(consumptionUpperSeries.at(seriesIndex).x)
-
-            ColumnLayout {
-                id: tooltipLayout
-                anchors {
-                    left: parent.left
-                    top: parent.top
-                    margins: Style.smallMargins
+                ActivityIndicator {
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    visible: powerBalanceLogs.fetchingData || logsLoader.fetchingData
+                    opacity: .5
                 }
                 Label {
-                    text: toolTip.timestamp.toLocaleString(Qt.locale(), Locale.ShortFormat)
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    text: qsTr("No data available")
+                    visible: !powerBalanceLogs.fetchingData && !logsLoader.fetchingData && (powerBalanceLogs.count == 0 || powerBalanceLogs.get(0).timestamp > d.now)
                     font: Style.smallFont
+                    opacity: .5
                 }
-                RowLayout {
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: consumptionSeries.color
-                    }
-                    Label {
-                        property double rawValue: consumptionUpperSeries.at(toolTip.seriesIndex).y
-                        property double displayValue: rawValue >= 1000 ? rawValue / 1000 : rawValue
-                        property string unit: rawValue >= 1000 ? "kW" : "W"
-                        text:  "%1: %2 %3".arg(qsTr("Total")).arg(displayValue.toFixed(2)).arg(unit)
-                        font: Style.extraSmallFont
+
+
+                ValueAxis {
+                    id: valueAxis
+                    min: 0
+                    max: 1
+                    labelFormat: ""
+                    gridLineColor: Style.tileOverlayColor
+                    labelsVisible: false
+                    lineVisible: false
+                    titleVisible: false
+                    shadesVisible: false
+                    //        visible: false
+
+                    function adjustMax(value) {
+                        max = Math.max(max, Math.ceil(value / 100) * 100)
                     }
                 }
 
-                Repeater {
-                    model: consumers
-                    delegate: RowLayout {
-                        id: consumerToolTipDelegate
-                        Rectangle {
-                            width: Style.extraSmallFont.pixelSize
-                            height: width
-//                            color: index >= 0 ? root.colors[index % root.colors.length] : "white"
-                            color: index >= 0 ? NymeaUtils.generateColor(Style.generationBaseColor, index) : "white"
-                        }
-
-                        Label {
-                            property ThingPowerLogEntry entry: thingPowerLogs.find(model.id, toolTip.timestamp)
-                            property double rawValue: entry ? entry.currentPower : 0
-                            property double displayValue: rawValue >= 1000 ? rawValue / 1000 : rawValue
-                            property string unit: rawValue >= 1000 ? "kW" : "W"
-                            text:  "%1: %2 %3".arg(model.name).arg(displayValue.toFixed(2)).arg(unit)
+                Item {
+                    id: labelsLayout
+                    x: Style.smallMargins
+                    y: chartView.plotArea.y
+                    height: chartView.plotArea.height
+                    width: chartView.plotArea.x - x
+                    Repeater {
+                        model: valueAxis.tickCount
+                        delegate: Label {
+                            y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
+                            width: parent.width - Style.smallMargins
+                            horizontalAlignment: Text.AlignRight
+                            text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1))) / 1000).toFixed(2) + "kW"
+                            verticalAlignment: Text.AlignTop
                             font: Style.extraSmallFont
                         }
                     }
                 }
+
+                DateTimeAxis {
+                    id: dateTimeAxis
+                    min: d.startTime
+                    max: d.endTime
+                    format: {
+                        switch (selectionTabs.currentValue.sampleRate) {
+                        case EnergyLogs.SampleRate1Min:
+                        case EnergyLogs.SampleRate15Mins:
+                            return "hh:mm"
+                        case EnergyLogs.SampleRate1Hour:
+                        case EnergyLogs.SampleRate3Hours:
+                        case EnergyLogs.SampleRate1Day:
+                            return "dd.MM."
+                        }
+                    }
+                    tickCount: {
+                        switch (selectionTabs.currentValue.sampleRate) {
+                        case EnergyLogs.SampleRate1Min:
+                        case EnergyLogs.SampleRate15Mins:
+                            return root.width > 500 ? 13 : 7
+                        case EnergyLogs.SampleRate1Hour:
+                            return 7
+                        case EnergyLogs.SampleRate3Hours:
+                        case EnergyLogs.SampleRate1Day:
+                            return root.width > 500 ? 12 : 6
+                        }
+                    }
+                    labelsFont: Style.extraSmallFont
+                    gridVisible: false
+                    minorGridVisible: false
+                    lineVisible: false
+                    shadesVisible: false
+                    labelsColor: Style.foregroundColor
+                }
+
+                AreaSeries {
+                    id: consumptionSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: Style.gray
+                    borderWidth: 0
+                    borderColor: color
+                    name: qsTr("Unknown")
+//                    visible: false
+                    opacity: .2
+
+                    lowerSeries: LineSeries {
+                        id: zeroSeries
+                        XYPoint { x: dateTimeAxis.min.getTime(); y: 0 }
+                        XYPoint { x: dateTimeAxis.max.getTime(); y: 0 }
+                        function ensureValue(timestamp) {
+                            if (count == 0) {
+                                append(timestamp, 0)
+                            } else if (count == 1) {
+                                if (timestamp.getTime() < at(0).x) {
+                                    insert(0, timestamp, 0)
+                                } else {
+                                    append(timestamp, 0)
+                                }
+                            } else {
+                                if (timestamp.getTime() < at(0).x) {
+                                    remove(0)
+                                    insert(0, timestamp, 0)
+                                } else if (timestamp.getTime() > at(1).x) {
+                                    remove(1)
+                                    append(timestamp, 0)
+                                }
+                            }
+                        }
+                        function shrink() {
+                            clear();
+                            if (powerBalanceLogs.count > 0) {
+                                ensureValue(powerBalanceLogs.get(0).timestamp)
+                                ensureValue(powerBalanceLogs.get(powerBalanceLogs.count - 1).timestamp)
+                            }
+                        }
+                    }
+                    upperSeries: LineSeries {
+                        id: consumptionUpperSeries
+                    }
+
+                    function addEntry(entry) {
+                        consumptionUpperSeries.append(entry.timestamp.getTime(), entry.consumption)
+                    }
+                    function insertEntry(index, entry) {
+                        consumptionUpperSeries.insert(index, entry.timestamp.getTime(), entry.consumption)
+                    }
+                }
+
+                Repeater {
+                    id: consumersRepeater
+                    model: consumers
+
+                    onCountChanged: {
+                        if (count == consumers.count) {
+                            logsLoader.fetchLogs()
+                        }
+                    }
+
+                    delegate: Item {
+                        id: consumerDelegate
+
+                        readonly property Thing thing: consumers.get(index)
+                        property AreaSeries series: null
+
+
+                        function getBaseValue(timestamp) {
+                            var ret = 0
+                            if (index > 0) {
+                                ret = consumersRepeater.itemAt(index - 1).getBaseValue(timestamp)
+                            }
+
+                            var entry = logs.find(timestamp)
+                            if (entry) {
+                                ret += entry.currentPower;
+                            }
+                            return ret
+                        }
+
+                        function insertEntry(idx, entry) {
+                            var baseValue = 0;
+                            if (index > 0) {
+                                baseValue = consumersRepeater.itemAt(index - 1).getBaseValue(entry.timestamp)
+                            }
+                            series.upperSeries.insert(idx, entry.timestamp.getTime(), entry.currentPower + baseValue)
+                        }
+
+                        readonly property ThingPowerLogs logs: ThingPowerLogs {
+                            engine: _engine
+                            startTime: new Date(d.startTime.getTime() - d.range * 60000)
+                            endTime: new Date(d.endTime.getTime() + d.range * 60000)
+                            sampleRate: d.sampleRate
+                            thingId: consumerDelegate.thing.id
+                            loader: logsLoader
+
+                            Component.onCompleted: print("thingpowerlogs completed")
+
+                            onLoadingInhibitedChanged: print("Loading...", consumerDelegate.thing.name)
+
+                            onEntriesAdded: {
+                                print("Thing entries added", consumerDelegate.thing.name, index, entries.length)
+                                for (var i = 0; i < entries.length; i++) {
+                                    var entry = entries[i]
+//                                    print("got thing entry", thing.name, entry.timestamp, entry.currentPower, index + i)
+
+                                    zeroSeries.ensureValue(entry.timestamp)
+                                    valueAxis.adjustMax(entry.currentPower)
+
+                                    consumerDelegate.insertEntry(index + i, entry)
+                                    if (entry.timestamp > d.now && new Date().getTime() - d.now.getTime() < 120000) {
+                                        d.now = entry.timestamp
+                                    }
+                                }
+                            }
+
+                            onEntriesRemoved: {
+                                consumerDelegate.series.upperSeries.removePoints(index, count)
+                                zeroSeries.shrink()
+                            }
+                        }
+
+                        Component.onCompleted: {
+                            series = chartView.createSeries(ChartView.SeriesTypeArea, thing.name, dateTimeAxis, valueAxis)
+                            series.lowerSeries = index == 0 ? zeroSeries : consumersRepeater.itemAt(index - 1).series.upperSeries
+                            series.upperSeries = lineSeriesComponent.createObject(series)
+                            series.color = NymeaUtils.generateColor(Style.generationBaseColor, index)
+                            series.borderWidth = 0;
+                            series.borderColor = series.color
+
+                        }
+                    }
+                }
+            }
+
+            MouseArea {
+                id: mouseArea
+                anchors.fill: parent
+                anchors.leftMargin: chartView.plotArea.x
+                anchors.topMargin: chartView.plotArea.y
+                anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
+                anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
+
+                hoverEnabled: true
+                preventStealing: tooltipping || dragging
+
+                property int startMouseX: 0
+                property bool dragging: false
+                property bool tooltipping: false
+
+                property var startDatetime: null
+
+                Timer {
+                    interval: 300
+                    running: mouseArea.pressed
+                    onTriggered: {
+                        if (!mouseArea.dragging) {
+                            mouseArea.tooltipping = true
+                        }
+                    }
+                }
+                onReleased: {
+                    mouseArea.tooltipping = false;
+
+                    if (mouseArea.dragging) {
+                        mouseArea.dragging = false;
+
+                        for (var i = 0; i < consumersRepeater.count; i++) {
+                            if (consumersRepeater.itemAt(i).logs.fetchingData) {
+                                wheelStopTimer.start()
+                                return;
+                            }
+                        }
+
+                        powerBalanceLogs.fetchLogs()
+                        logsLoader.fetchLogs()
+//                        for (var i = 0; i < consumersRepeater.count; i++) {
+//                            consumersRepeater.itemAt(i).logs.fetchLogs()
+//                        }
+                    }
+                }
+
+                onPressed: {
+                    startMouseX = mouseX
+                    startDatetime = d.now
+                }
+
+
+                onDoubleClicked: {
+                    if (selectionTabs.currentIndex == 0) {
+                        return;
+                    }
+
+                    var idx = Math.ceil(mouseArea.mouseX * d.visibleValues / mouseArea.width)
+                    var timestamp = new Date(d.startTime.getTime() + (idx * d.sampleRate * 60000))
+                    selectionTabs.currentIndex--
+                    d.now = new Date(timestamp.getTime() + (d.visibleValues / 2) * d.sampleRate * 60000)
+                    powerBalanceLogs.fetchLogs()
+                    logsLoader.fetchLogs()
+                }
+
+                onMouseXChanged: {
+                    if (!pressed || mouseArea.tooltipping) {
+                        return;
+                    }
+                    if (Math.abs(startMouseX - mouseX) < 10) {
+                        return;
+                    }
+                    dragging = true
+
+                    var dragDelta = startMouseX - mouseX
+                    var totalTime = d.endTime.getTime() - d.startTime.getTime()
+                    // dragDelta : timeDelta = width : totalTime
+                    var timeDelta = dragDelta * totalTime / mouseArea.width
+                    print("dragging", dragDelta, totalTime, mouseArea.width)
+                    d.now = new Date(Math.min(new Date(), new Date(startDatetime.getTime() + timeDelta)))
+                }
+
+                onWheel: {
+                    startDatetime = d.now
+                    var totalTime = d.endTime.getTime() - d.startTime.getTime()
+                    // pixelDelta : timeDelta = width : totalTime
+                    var timeDelta = wheel.pixelDelta.x * totalTime / mouseArea.width
+                    print("wheeling", wheel.pixelDelta.x, totalTime, mouseArea.width)
+                    d.now = new Date(Math.min(new Date(), new Date(startDatetime.getTime() - timeDelta)))
+                    wheelStopTimer.restart()
+                }
+                Timer {
+                    id: wheelStopTimer
+                    interval: 300
+                    repeat: false
+                    onTriggered: {
+                        for (var i = 0; i < consumersRepeater.count; i++) {
+                            if (consumersRepeater.itemAt(i).logs.fetchingData) {
+                                wheelStopTimer.start()
+                                return;
+                            }
+                        }
+
+                        powerBalanceLogs.fetchLogs()
+                        logsLoader.fetchLogs()
+//                        for (var i = 0; i < consumersRepeater.count; i++) {
+//                            consumersRepeater.itemAt(i).logs.fetchLogs()
+//                        }
+                    }
+                }
+
+                Rectangle {
+                    height: parent.height
+                    width: 1
+                    color: Style.foregroundColor
+                    x: Math.min(mouseArea.width - 1, Math.max(0, mouseArea.mouseX))
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+                }
+
+                NymeaToolTip {
+                    id: toolTip
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+
+                    backgroundItem: chartView
+                    backgroundRect: Qt.rect(mouseArea.x + toolTip.x, mouseArea.y + toolTip.y, toolTip.width, toolTip.height)
+
+                    property int idx: Math.ceil(mouseArea.mouseX * d.visibleValues / mouseArea.width)
+                    property date timestamp: new Date(d.startTime.getTime() + (idx * d.sampleRate * 60000))
+                    property PowerBalanceLogEntry entry: powerBalanceLogs.find(timestamp)
+
+                    property int xOnRight: Math.max(0, mouseArea.mouseX) + Style.smallMargins
+                    property int xOnLeft: Math.min(mouseArea.width, mouseArea.mouseX) - Style.smallMargins - width
+                    x: xOnRight + width < mouseArea.width ? xOnRight : xOnLeft
+                    property double maxValue: toolTip.entry ? Math.max(0, entry.consumption) : 0
+                    y: Math.min(Math.max(mouseArea.height - (maxValue * mouseArea.height / valueAxis.max) - height - Style.margins, 0), mouseArea.height - height)
+
+                    width: tooltipLayout.implicitWidth + Style.smallMargins * 2
+                    height: tooltipLayout.implicitHeight + Style.smallMargins * 2
+
+                    ColumnLayout {
+                        id: tooltipLayout
+                        anchors {
+                            left: parent.left
+                            top: parent.top
+                            margins: Style.smallMargins
+                        }
+                        Label {
+                            text: toolTip.timestamp.toLocaleString(Qt.locale(), Locale.ShortFormat)
+                            font: Style.smallFont
+                        }
+                        RowLayout {
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: consumptionSeries.color
+                            }
+                            Label {
+                                property double rawValue: toolTip.entry ? toolTip.entry.consumption : 0
+                                property double displayValue: rawValue >= 1000 ? rawValue / 1000 : rawValue
+                                property string unit: rawValue >= 1000 ? "kW" : "W"
+                                text:  "%1: %2 %3".arg(qsTr("Total")).arg(displayValue.toFixed(2)).arg(unit)
+                                font: Style.extraSmallFont
+                            }
+                        }
+
+                        Repeater {
+                            model: consumers
+                            delegate: RowLayout {
+                                id: consumerToolTipDelegate
+                                Rectangle {
+                                    width: Style.extraSmallFont.pixelSize
+                                    height: width
+        //                            color: index >= 0 ? root.colors[index % root.colors.length] : "white"
+                                    color: index >= 0 ? NymeaUtils.generateColor(Style.generationBaseColor, index) : "white"
+                                }
+
+                                Label {
+                                    property ThingPowerLogEntry entry: toolTip.idx >= 0 ? consumersRepeater.itemAt(index).logs.find(toolTip.timestamp) : null
+                                    property double rawValue: entry ? entry.currentPower : 0
+                                    property double displayValue: rawValue >= 1000 ? rawValue / 1000 : rawValue
+                                    property string unit: rawValue >= 1000 ? "kW" : "W"
+                                    text:  "%1: %2 %3".arg(model.name).arg(displayValue.toFixed(2)).arg(unit)
+                                    font: Style.extraSmallFont
+                                }
+                            }
+                        }
+                    }
+                }
             }
         }
     }
+
+
 }

nymea-app/ui/mainviews/energy/PowerBalanceStats.qml

@@ -19,48 +19,98 @@ StatsBase {
 
     QtObject {
         id: d
-        property BarSet consumptionSet: null
-        property BarSet productionSet: null
-        property BarSet acquisitionSet: null
-        property BarSet returnSet: null
-    }
+        property var config: root.configs[selectionTabs.currentValue.config]
+        property int startOffset: 0
 
-    function reload() {
-        if (selectionTabs.currentValue === undefined) {
-            return
-        }
-        if (engine.thingManager.fetchingData) {
-            return;
+        property date startTime: root.calculateTimestamp(config.startTime(), config.sampleRate, startOffset)
+        property date endTime: root.calculateTimestamp(config.startTime(), config.sampleRate, startOffset + config.count)
+
+        property bool fetchPending: false
+        property bool loading: fetchPending || wheelStopTimer.running || powerBalanceLogs.fetchingData
+        onLoadingChanged: {
+            if (!loading) {
+                refresh()
+            }
         }
 
-        var config = root.configs[selectionTabs.currentValue.config]
-        print("Loading Power Balance Stats with config:", config.startTime(), config.sampleRate)
+        onConfigChanged: valueAxis.max = 1
+        onStartOffsetChanged: {
+//            print("updating because of offset change. fetchingData", powerBalanceLogs.fetchingData, "fetchPending", d.fetchPending)
+            refresh()
+        }
+        function refresh() {
+            if (powerBalanceLogs.loadingInhibited) {
+                return;
+            }
 
-        powerBalanceLogs.loadingInhibited = true
-        powerBalanceLogs.sampleRate = config.sampleRate
-        powerBalanceLogs.startTime = new Date(config.startTime().getTime() - config.sampleRate * 60000)
-        powerBalanceLogs.loadingInhibited = false
-
-        chartView.reset();
-    }
-
-    Connections {
-        target: engine.thingManager
-        onFetchingDataChanged: {
-            print("Thingmanager loaded", engine.thingManager.fetchingData)
-            if (!engine.thingManager.fetchingData) root.reload()
+            var upcomingTimestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.config.count)
+//            print("refreshing config start", d.config.startTime(), "upcoming:", upcomingTimestamp, "fetchPending", d.fetchPending)
+            for (var i = 0; i < d.config.count; i++) {
+                var timestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + i + 1)
+                var previousTimestamp = root.calculateTimestamp(timestamp, d.config.sampleRate, -1)
+//                print("timestamp:", timestamp)
+                var entry = powerBalanceLogs.find(timestamp)
+                var previousEntry = powerBalanceLogs.find(previousTimestamp);
+                if (entry && (previousEntry || !d.loading)) {
+//                    print("found entry:", entry.timestamp, previousEntry)
+//                    print("Acquisition", entry.totalAcquisition)
+                    var consumption = entry.totalConsumption
+                    var production = entry.totalProduction
+                    var acquisition = entry.totalAcquisition
+                    var returned = entry.totalReturn
+                    if (previousEntry) {
+                        consumption -= previousEntry.totalConsumption
+                        production -= previousEntry.totalProduction
+                        acquisition -= previousEntry.totalAcquisition
+                        returned -= previousEntry.totalReturn
+                    }
+                    consumptionSet.replace(i, consumption)
+                    productionSet.replace(i, production)
+                    acquisitionSet.replace(i, acquisition)
+                    returnSet.replace(i, returned)
+                    valueAxis.adjustMax(consumption)
+                    valueAxis.adjustMax(production)
+                    valueAxis.adjustMax(acquisition)
+                    valueAxis.adjustMax(returned)
+                } else if (timestamp.getTime() == upcomingTimestamp.getTime() && (previousEntry || !d.loading)) {
+//                    print("it's today!")
+                    var consumption = energyManager.totalConsumption
+                    var production = energyManager.totalProduction
+                    var acquisition = energyManager.totalAcquisition
+                    var returned = energyManager.totalReturn
+                    if (previousEntry) {
+                        consumption -= previousEntry.totalConsumption
+                        production -= previousEntry.totalProduction
+                        acquisition -= previousEntry.totalAcquisition
+                        returned -= previousEntry.totalReturn
+                    }
+                    consumptionSet.replace(i, consumption)
+                    productionSet.replace(i, production)
+                    acquisitionSet.replace(i, acquisition)
+                    returnSet.replace(i, returned)
+                    valueAxis.adjustMax(consumption)
+                    valueAxis.adjustMax(production)
+                    valueAxis.adjustMax(acquisition)
+                    valueAxis.adjustMax(returned)
+                } else {
+                    consumptionSet.replace(i, 0)
+                    productionSet.replace(i, 0)
+                    acquisitionSet.replace(i, 0)
+                    returnSet.replace(i, 0)
+                }
+            }
         }
     }
 
     ColumnLayout {
         anchors.fill: parent
+        spacing: 0
 
         Label {
             Layout.fillWidth: true
             Layout.margins: Style.smallMargins
             horizontalAlignment: Text.AlignHCenter
             text: qsTr("Totals")
-
         }
 
         SelectionTabs {
@@ -68,422 +118,419 @@ StatsBase {
             Layout.fillWidth: true
             Layout.leftMargin: Style.smallMargins
             Layout.rightMargin: Style.smallMargins
+            currentIndex: 1
             model: ListModel {
-                Component.onCompleted: {
-                    append({modelData: qsTr("Hours"), config: "hours" })
-                    append({modelData: qsTr("Days"), config: "days" })
-                    append({modelData: qsTr("Weeks"), config: "weeks" })
-                    append({modelData: qsTr("Months"), config: "months" })
-                    append({modelData: qsTr("Years"), config: "years" })
-//                    append({modelData: qsTr("Minutes"), config: "minutes" })
-
-                    selectionTabs.currentIndex = 1
-                }
+                ListElement { modelData: qsTr("Hours"); config: "hours" }
+                ListElement { modelData: qsTr("Days"); config: "days" }
+                ListElement { modelData: qsTr("Weeks"); config: "weeks" }
+                ListElement { modelData: qsTr("Months"); config: "months" }
+                ListElement { modelData: qsTr("Years"); config: "years" }
+//                ListElement { modelData: qsTr("Minutes"); config: "minutes" }
             }
-            onCurrentValueChanged: {
-                root.reload()
+            onTabSelected: {
+                d.startOffset = 0
+                powerBalanceLogs.fetchLogs()
             }
         }
 
         Connections {
             target: energyManager
             onPowerBalanceChanged: {
-                var start = powerBalanceLogs.get(powerBalanceLogs.count - 1 )
-//                print("balance changed:", d.consumptionSet, powerBalanceLogs, powerBalanceLogs.count)
-//                print("updating", start ? start.timestamp : "", start ? start.totalConsumption : 0, root.energyManager.totalConsumption, root.energyManager.totalConsumption - (start ? start.totalConsumption : 0))
-                if (root.hasProducers) {
-                    var consumption = root.energyManager.totalConsumption - (start ? start.totalConsumption : 0)
-                    d.consumptionSet.replace(d.consumptionSet.count - 1, consumption)
-                    valueAxis.adjustMax(consumption)
-                    var production = root.energyManager.totalProduction - (start ? start.totalProduction : 0)
-                    d.productionSet.replace(d.productionSet.count - 1, production)
-                    valueAxis.adjustMax(production)
-                }
-                var acquisition = root.energyManager.totalAcquisition - (start ? start.totalAcquisition : 0)
-                if (d.acquisitionSet) {
-                    d.acquisitionSet.replace(d.acquisitionSet.count - 1, acquisition)
-                }
-                valueAxis.adjustMax(acquisition)
-                var ret = root.energyManager.totalReturn - (start ? start.totalReturn : 0)
-                if (d.returnSet) {
-                    d.returnSet.replace(d.returnSet.count - 1, ret)
-                }
-                valueAxis.adjustMax(ret)
+//                print("updating because of power balance change. fetchingData", powerBalanceLogs.fetchingData, "fetchPending", d.fetchPending)
+                d.refresh();
             }
         }
 
         PowerBalanceLogs {
             id: powerBalanceLogs
             engine: _engine
-            loadingInhibited: true
+            startTime: root.calculateTimestamp(d.startTime, d.config.sampleRate, -d.config.count)
+            endTime: root.calculateTimestamp(d.startTime, d.config.sampleRate, d.config.count)
+            sampleRate: d.config.sampleRate
+            Component.onCompleted: fetchLogs()
 
             onFetchingDataChanged: {
                 if (!fetchingData) {
-                    chartView.animationOptions = ChartView.NoAnimation
-
-                    chartView.reset();
-
                     print("Logs fetched")
-                    var config = root.configs[selectionTabs.currentValue.config]
-
-                    var labels = []
-                    var entries = []
-
-                    var newestLogTimestamp = powerBalanceLogs.count > 0 ? powerBalanceLogs.get(powerBalanceLogs.count - 1).timestamp : new Date();
-                    for (var i = 0; i < config.count; i++) {
-                        var entry = powerBalanceLogs.get(powerBalanceLogs.count - i - 1)
-
-                        // if it's the first, let's add a generated entry which shows the total from the newest log to the current live value
-                        if (i == 0) {
-                            var liveEntry = {
-                                consumption: energyManager.totalConsumption,
-                                production: energyManager.totalProduction,
-                                acquisition: energyManager.totalAcquisition,
-                                returned: energyManager.totalReturn
-                            }
-                            if (entry) {
-                                liveEntry.consumption -= entry.totalConsumption
-                                liveEntry.production -= entry.totalProduction
-                                liveEntry.acquisition -= entry.totalAcquisition
-                                liveEntry.returned -= entry.totalReturn
-                            }
-//                            print("Adding live entry:", liveEntry.consumption, root.energyManager.totalConsumption, entry ? entry.totalConsumption : 0)
-                            entries.unshift(liveEntry)
-                            valueAxis.adjustMax(liveEntry.consumption)
-                            valueAxis.adjustMax(liveEntry.production)
-                            valueAxis.adjustMax(liveEntry.acquisition)
-                            valueAxis.adjustMax(liveEntry.returned)
-                        }
-
-                        // Add the actual entry
-                        var graphEntry = {
-                            consumption: 0,
-                            production: 0,
-                            acquisition: 0,
-                            returned: 0
-                        }
-                        var labelTime = new Date();
-                        if (entry) {
-//                            print("Have entry:", entry.timestamp, config.toLabel(entry.timestamp))
-                            var previous = powerBalanceLogs.get(powerBalanceLogs.count - i - 2)
-                            if (previous) {
-                                graphEntry.consumption = entry.totalConsumption - previous.totalConsumption
-                                graphEntry.production = entry.totalProduction - previous.totalProduction
-                                graphEntry.acquisition = entry.totalAcquisition - previous.totalAcquisition
-                                graphEntry.returned = entry.totalReturn - previous.totalReturn
-                            } else {
-                                graphEntry.consumption = entry.totalConsumption
-                                graphEntry.production = entry.totalProduction
-                                graphEntry.acquisition = entry.totalAcquisition
-                                graphEntry.returned = entry.totalReturn
-                            }
-                            labelTime = entry.timestamp
-                        } else {
-                            labelTime = calculateSampleStart(newestLogTimestamp, config.sampleRate, i)
-                        }
-
-//                        print("Adding entry:", labelTime, graphEntry.consumption, config.toLabel(labelTime))
-                        entries.unshift(graphEntry)
-                        labels.unshift(labelTime)
-
-                        // Given we've added 2 entries for the first run but only one label, we'll add the missing label
-                        // at the end. This will shift the labels by one entries but that's ok because the logs timestamp
-                        // is when the sample was created, but for the user it's better to show the the consumption values
-                        // *during* that sample, not *before* the sample
-                        if (i == config.count - 1) {
-                            labelTime = new Date(labelTime.getTime() - config.sampleRate * 60000)
-//                            print("Adding oldest entry label", labelTime, config.sampleRate, config.toLabel(labelTime))
-                            labels.unshift(labelTime)
-                        }
-
-                        valueAxis.adjustMax(graphEntry.consumption)
-                        valueAxis.adjustMax(graphEntry.production)
-                        valueAxis.adjustMax(graphEntry.acquisition)
-                        valueAxis.adjustMax(graphEntry.returned)
-                    }
-
-//                    print("assigning categories:", labels)
-                    categoryAxis.timestamps = labels
-
-                    chartView.animationOptions = NymeaUtils.chartsAnimationOptions
-
-                    for (var i = 0; i < entries.length; i++) {
-                        print("Appending to set", JSON.stringify(entries[i]))
-                        if (root.hasProducers) {
-                            d.consumptionSet.append(entries[i].consumption)
-                            d.productionSet.append(entries[i].production)
-                        }
-                        d.acquisitionSet.append(entries[i].acquisition)
-                        d.returnSet.append(entries[i].returned)
-                    }
+                    d.fetchPending = false
+                    d.refresh()
                 }
             }
 
-            onEntryAdded: {
+            onEntriesAdded: {
                 if (fetchingData) {
                     return
                 }
-
-//                print("Entry added")
-                var config = root.configs[selectionTabs.currentValue.config]
-
-
-                var start = entry
-                var consumptionValue = root.energyManager.totalConsumption - (start ? start.totalConsumption : 0)
-                var productionValue = root.energyManager.totalProduction - (start ? start.totalProduction : 0)
-                var acquisitionValue = root.energyManager.totalAcquisition - (start ? start.totalAcquisition : 0)
-                var returnValue = root.energyManager.totalReturn - (start ? start.totalReturn : 0)
-//                print("Entry added:", entry.timestamp, entry.totalConsumption, consumptionValue)
-
-                chartView.animationOptions = ChartView.NoAnimation
-
-                var timestamps = categoryAxis.timestamps;
-                timestamps.push(entry.timestamp)
-                timestamps.splice(0, 1)
-                categoryAxis.timestamps = timestamps
-
-                if (root.hasProducers) {
-                    d.consumptionSet.remove(0, 1);
-                    d.consumptionSet.append(consumptionValue)
-                    d.productionSet.remove(0, 1);
-                    d.productionSet.append(productionValue)
-                }
-                d.acquisitionSet.remove(0, 1);
-                d.acquisitionSet.append(acquisitionValue)
-                d.returnSet.remove(0, 1);
-                d.returnSet.append(returnValue)
-
-                chartView.animationOptions = NymeaUtils.chartsAnimationOptions
+                // Update the timeline by faking a left/right scroll
+                d.startOffset--
+                d.startOffset++
+                //d.refresh()
             }
         }
 
-
-        ChartView {
-            id: chartView
+        Item {
             Layout.fillWidth: true
             Layout.fillHeight: true
-            animationOptions: ChartView.NoAnimation
 
-            backgroundColor: "transparent"
-            legend.alignment: Qt.AlignBottom
-            legend.font: Style.extraSmallFont
-            legend.labelColor: Style.foregroundColor
+            Label {
+                x: chartView.x + chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                y: chartView.y + chartView.plotArea.y + Style.smallMargins
+                text: d.config.toRangeLabel(d.startTime)
+                font: Style.smallFont
+                opacity: d.startOffset < -d.config.count ? .5 : 0
+                Behavior on opacity { NumberAnimation {} }
+            }
 
-        //    margins.left: 0
-            margins.right: 0
-            margins.bottom: 0
-            margins.top: 0
+            ChartView {
+                id: chartView
+                animationOptions: ChartView.NoAnimation
+                anchors.fill: parent
 
-            function reset() {
-                barSeries.clear();
-                valueAxis.max = 0
-                if (root.hasProducers) {
-                    d.consumptionSet = barSeries.append(qsTr("Consumed"), [])
-                    d.consumptionSet.color = Style.blue
-                    d.consumptionSet.borderColor = d.consumptionSet.color
-                    d.consumptionSet.borderWidth = 0
-                    d.productionSet = barSeries.append(qsTr("Produced"), [])
-                    d.productionSet.color = Style.yellow
-                    d.productionSet.borderColor = d.productionSet.color
-                    d.productionSet.borderWidth = 0
+                backgroundColor: "transparent"
+                legend.alignment: Qt.AlignBottom
+                legend.font: Style.extraSmallFont
+                legend.labelColor: Style.foregroundColor
+
+            //    margins.left: 0
+                margins.right: 0
+                margins.bottom: 0
+                margins.top: 0
+
+                ActivityIndicator {
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    visible: powerBalanceLogs.fetchingData
+                    opacity: .5
+                }
+                Label {
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    text: qsTr("No data available")
+                    visible: !powerBalanceLogs.fetchingData && (powerBalanceLogs.count == 0 || powerBalanceLogs.get(0).timestamp > d.endTime) && d.startOffset != 0
+                    font: Style.smallFont
+                    opacity: .5
+                    Behavior on opacity { NumberAnimation {}}
+                }
+
+                Item {
+                    id: labelsLayout
+                    x: Style.smallMargins
+                    y: chartView.plotArea.y
+                    height: chartView.plotArea.height
+                    width: chartView.plotArea.x - x
+
+                    Repeater {
+                        model: valueAxis.tickCount
+                        delegate: Label {
+                            y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
+                            width: parent.width - Style.smallMargins
+                            horizontalAlignment: Text.AlignRight
+                            text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1)))).toFixed(1) + "kWh"
+                            verticalAlignment: Text.AlignTop
+                            font: Style.extraSmallFont
+                        }
+                    }
+                }
+
+                BarSeries {
+                    id: barSeries
+                    axisX: BarCategoryAxis {
+                        id: categoryAxis
+                        labelsColor: Style.foregroundColor
+                        labelsFont: Style.extraSmallFont
+                        gridVisible: false
+                        gridLineColor: Style.tileOverlayColor
+                        lineVisible: false
+                        titleVisible: false
+                        shadesVisible: false
+
+                        categories: {
+                            var ret = []
+                            print("Updating categories from", d.config.startTime())
+                            for (var i = 0; i < d.config.count; i++) {
+                                var timestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + i);
+                                print("*** adding", timestamp, d.startOffset, i)
+                                ret.push(d.config.toLabel(timestamp))
+                            }
+                            return ret;
+                        }
+                    }
+                    axisY: ValueAxis {
+                        id: valueAxis
+                        min: 0
+                        gridLineColor: Style.tileOverlayColor
+                        labelsVisible: false
+                        labelsColor: Style.foregroundColor
+                        labelsFont: Style.extraSmallFont
+                        lineVisible: false
+                        titleVisible: false
+                        shadesVisible: false
+
+                        function adjustMax(newValue) {
+                            if (max < newValue) {
+                                print("adjusting to new max", newValue)
+                                max = newValue // Math.ceil(newValue / 100) * 100
+                            }
+                        }
+                    }
+
+                    BarSet {
+                        id: consumptionSet
+                        label: qsTr("Consumed")
+                        color: Style.blue
+                        borderColor: color
+                        borderWidth: 0
+                        values: {
+                            var ret = []
+                            for (var i = 0; i < d.config.count; i++) {
+                                ret.push(0)
+                            }
+                            return ret
+                        }
+                    }
+                    BarSet {
+                        id: productionSet
+                        label: qsTr("Produced")
+                        color: Style.yellow
+                        borderColor: color
+                        borderWidth: 0
+                        values: {
+                            var ret = []
+                            for (var i = 0; i < d.config.count; i++) {
+                                ret.push(0)
+                            }
+                            return ret
+                        }
+                    }
+
+                    BarSet {
+                        id: acquisitionSet
+                        label: qsTr("From grid")
+                        color: Style.red
+                        borderColor: color
+                        borderWidth: 0
+                        values: {
+                            var ret = []
+                            for (var i = 0; i < d.config.count; i++) {
+                                ret.push(0)
+                            }
+                            return ret
+                        }
+                    }
+                    BarSet {
+                        id: returnSet
+                        label: qsTr("To grid")
+                        color: Style.green
+                        borderColor: color
+                        borderWidth: 0
+                        values: {
+                            var ret = []
+                            for (var i = 0; i < d.config.count; i++) {
+                                ret.push(0)
+                            }
+                            return ret
+                        }
+                    }
                 }
-                d.acquisitionSet = barSeries.append(qsTr("From grid"), [])
-                d.acquisitionSet.color = Style.red
-                d.acquisitionSet.borderColor = d.acquisitionSet.color
-                d.acquisitionSet.borderWidth = 0
-                d.returnSet = barSeries.append(qsTr("To grid"), [])
-                d.returnSet.color = Style.green
-                d.returnSet.borderColor = d.returnSet.color
-                d.returnSet.borderWidth = 0
             }
 
             Item {
-                id: labelsLayout
-                x: Style.smallMargins
-                y: chartView.plotArea.y
-                height: chartView.plotArea.height
-                width: chartView.plotArea.x - x
+                anchors.fill: parent
+                anchors.leftMargin: chartView.x + chartView.plotArea.x
+                anchors.topMargin: chartView.y + chartView.plotArea.y
+                anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
+                anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
+                z: -1
 
-                Repeater {
-                    model: valueAxis.tickCount
-                    delegate: Label {
-                        y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
-                        width: parent.width - Style.smallMargins
-                        horizontalAlignment: Text.AlignRight
-                        text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1)))).toFixed(1) + "kWh"
-                        verticalAlignment: Text.AlignTop
-                        font: Style.extraSmallFont
-                    }
+                Rectangle {
+                    height: parent.height + Style.margins * 2
+                    y: -Style.smallMargins
+                    radius: Style.smallCornerRadius
+                    width: chartView.plotArea.width / categoryAxis.count
+                    color: Style.tileBackgroundColor
+                    property int idx: Math.min(Math.max(0,Math.floor(mouseArea.mouseX * categoryAxis.count / mouseArea.width)), categoryAxis.count - 1)
+                    visible: toolTip.visible
+
+                    x: idx * parent.width / categoryAxis.count
+                    Behavior on x { enabled: toolTip.animationsEnabled; NumberAnimation { duration: Style.animationDuration } }
                 }
             }
 
-            BarSeries {
-                id: barSeries
-                axisX: BarCategoryAxis {
-                    id: categoryAxis
-                    labelsColor: Style.foregroundColor
-                    labelsFont: Style.extraSmallFont
-                    gridVisible: false
-                    gridLineColor: Style.tileOverlayColor
-                    lineVisible: false
-                    titleVisible: false
-                    shadesVisible: false
+            MouseArea {
+                id: mouseArea
+                anchors.fill: parent
+                anchors.leftMargin: chartView.x + chartView.plotArea.x
+                anchors.topMargin: chartView.y + chartView.plotArea.y
+                anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
+                anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
 
-                    categories: {
-                        var ret = []
-                        for (var i = 0; i < timestamps.length; i++) {
-                            ret.push(root.configs[selectionTabs.currentValue.config].toLabel(timestamps[i]))
-                        }
-                        return ret
-                    }
+                hoverEnabled: true
+                preventStealing: tooltipping || dragging
 
-                    property var timestamps: []
+                property int startMouseX: 0
+                property bool dragging: false
+                property bool tooltipping: false
+                property int dragStartOffset: 0
 
-                }
-                axisY: ValueAxis {
-                    id: valueAxis
-                    min: 0
-                    gridLineColor: Style.tileOverlayColor
-                    labelsVisible: false
-                    labelsColor: Style.foregroundColor
-                    labelsFont: Style.extraSmallFont
-                    lineVisible: false
-                    titleVisible: false
-                    shadesVisible: false
-
-                    function adjustMax(newValue) {
-                        if (max < newValue) {
-                            max = newValue // Math.ceil(newValue / 100) * 100
+                Timer {
+                    interval: 300
+                    running: mouseArea.pressed
+                    onTriggered: {
+                        if (!mouseArea.dragging) {
+                            mouseArea.tooltipping = true
                         }
                     }
                 }
-            }
-        }
-    }
 
-    Item {
-        anchors.fill: parent
-        anchors.leftMargin: chartView.x + chartView.plotArea.x
-        anchors.topMargin: chartView.y + chartView.plotArea.y
-        anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
-        anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
-        z: -1
+                onReleased: {
+                    if (mouseArea.dragging) {
+                        powerBalanceLogs.fetchLogs()
+                        mouseArea.dragging = false;
+                    }
 
-        Rectangle {
-            height: parent.height + Style.margins * 2
-            y: -Style.smallMargins
-            radius: Style.smallCornerRadius
-            width: chartView.plotArea.width / categoryAxis.count
-            color: Style.tileBackgroundColor
-            property int idx: Math.min(Math.max(0,Math.floor(mouseArea.mouseX * categoryAxis.count / mouseArea.width)), categoryAxis.count - 1)
-            visible: toolTip.visible
-
-            x: idx * parent.width / categoryAxis.count
-            Behavior on x { enabled: toolTip.animationsEnabled; NumberAnimation { duration: Style.animationDuration } }
-        }
-    }
-
-    MouseArea {
-        id: mouseArea
-        anchors.fill: parent
-        anchors.leftMargin: chartView.x + chartView.plotArea.x
-        anchors.topMargin: chartView.y + chartView.plotArea.y
-        anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
-        anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
-
-        hoverEnabled: true
-
-        Timer {
-            interval: 300
-            running: mouseArea.pressed
-            onTriggered: mouseArea.preventStealing = true
-        }
-        onReleased: mouseArea.preventStealing = false
-
-        NymeaToolTip {
-            id: toolTip
-
-            backgroundItem: chartView
-            backgroundRect: Qt.rect(chartView.plotArea.x + toolTip.x, chartView.plotArea.y + toolTip.y, toolTip.width, toolTip.height)
-
-            property int idx: Math.min(Math.max(0,Math.floor(mouseArea.mouseX * categoryAxis.count / mouseArea.width)), categoryAxis.count - 1)
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-
-            property int chartWidth: chartView.plotArea.width
-            property int barWidth: chartWidth / categoryAxis.count
-
-            x: chartWidth - (idx * barWidth + barWidth + Style.smallMargins) > width ?
-                   idx * barWidth + barWidth + Style.smallMargins
-                 : idx * barWidth - Style.smallMargins - width
-            property double setMaxValue: Math.max(d.consumptionSet ? d.consumptionSet.at(idx) : 0,
-                                                  d.productionSet ? d.productionSet.at(idx) : 0,
-                                                  d.acquisitionSet ? d.acquisitionSet.at(idx) : 0,
-                                                  d.returnSet ? d.returnSet.at(idx) : 0)
-            y: Math.min(Math.max(mouseArea.height - (setMaxValue * mouseArea.height / valueAxis.max) - height - Style.smallMargins, 0), mouseArea.height - height)
-            width: tooltipLayout.implicitWidth + Style.smallMargins * 2
-            height: tooltipLayout.implicitHeight + Style.smallMargins * 2
-
-            ColumnLayout {
-                id: tooltipLayout
-                anchors {
-                    left: parent.left
-                    top: parent.top
-                    margins: Style.smallMargins
+                    mouseArea.tooltipping = false;
                 }
 
-                Label {
-                    text: toolTip.idx >= 0 && categoryAxis.timestamps.length > toolTip.idx ? root.configs[selectionTabs.currentValue.config].toLongLabel(categoryAxis.timestamps[toolTip.idx]) : ""
-                    font: Style.smallFont
+                onPressed: {
+                    startMouseX = mouseX
+                    dragStartOffset = d.startOffset
                 }
 
-                RowLayout {
-                    visible: root.hasProducers
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.blue
-                    }
-                    Label {
-                        text: toolTip.visible && d.consumptionSet ? qsTr("Consumed: %1 kWh").arg(d.consumptionSet.at(toolTip.idx).toFixed(2)) : ""
-                        font: Style.extraSmallFont
-                    }
+                onDoubleClicked: {
+                    var idx = Math.ceil(mouseArea.mouseX * d.config.count / mouseArea.width) - 1
+                    var timestamp = root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + idx)
+                    selectionTabs.currentIndex--
+                    var startTime = d.config.startTime()
+                    d.startOffset = (timestamp.getTime() - startTime.getTime()) / (d.config.sampleRate * 60 * 1000)
+                    powerBalanceLogs.fetchLogs();
                 }
-                RowLayout {
-                    visible: root.hasProducers
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.yellow
+
+                onMouseXChanged: {
+                    if (!pressed || mouseArea.tooltipping) {
+                        return;
                     }
-                    Label {
-                        text: toolTip.visible && d.productionSet ? qsTr("Produced: %1 kWh").arg(d.productionSet.at(toolTip.idx).toFixed(2)) : ""
-                        font: Style.extraSmallFont
+                    if (Math.abs(startMouseX - mouseX) < 10) {
+                        return;
                     }
+                    dragging = true
+
+                    var dragDelta = startMouseX - mouseX
+                    var slotWidth = mouseArea.width / d.config.count
+                    var offset = Math.floor(dragDelta / slotWidth);
+                    d.startOffset = Math.min(dragStartOffset + offset, 0)
+                    d.fetchPending = true;
                 }
-                RowLayout {
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.red
+
+                property int wheelDelta: 0
+                onWheel: {
+                    wheelDelta += wheel.pixelDelta.x
+                    var slotWidth = mouseArea.width / d.config.count
+                    while (wheelDelta > slotWidth) {
+                        d.startOffset--
+                        wheelDelta -= slotWidth
                     }
-                    Label {
-                        text: toolTip.visible && d.acquisitionSet ? qsTr("From grid: %1 kWh").arg(d.acquisitionSet.at(toolTip.idx).toFixed(2)) : ""
-                        font: Style.extraSmallFont
+                    while (wheelDelta < -slotWidth) {
+                        d.startOffset = Math.min(d.startOffset + 1, 0)
+                        wheelDelta += slotWidth
                     }
+                    d.fetchPending = true;
+                    wheelStopTimer.restart()
                 }
-                RowLayout {
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.green
-                    }
-                    Label {
-                        text: toolTip.visible && d.returnSet ? qsTr("To grid: %1 kWh").arg(d.returnSet.at(toolTip.idx).toFixed(2)) : ""
-                        font: Style.extraSmallFont
+
+                Timer {
+                    id: wheelStopTimer
+                    interval: 300
+                    repeat: false
+                    onTriggered: powerBalanceLogs.fetchLogs()
+                }
+
+                NymeaToolTip {
+                    id: toolTip
+
+                    backgroundItem: chartView
+                    backgroundRect: Qt.rect(chartView.plotArea.x + toolTip.x, chartView.plotArea.y + toolTip.y, toolTip.width, toolTip.height)
+
+                    property int idx: Math.ceil(mouseArea.mouseX * d.config.count / mouseArea.width) - 1
+                    property date timestamp: root.calculateTimestamp(d.config.startTime(), d.config.sampleRate, d.startOffset + idx)
+
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+
+                    property int chartWidth: chartView.plotArea.width
+                    property int barWidth: chartWidth / categoryAxis.count
+
+                    x: chartWidth - (idx * barWidth + barWidth + Style.smallMargins) > width ?
+                           idx * barWidth + barWidth + Style.smallMargins
+                         : idx * barWidth - Style.smallMargins - width
+                    property double setMaxValue: d.startOffset !== undefined ? Math.max(consumptionSet.at(idx),
+                                                          productionSet.at(idx),
+                                                          acquisitionSet.at(idx),
+                                                          returnSet.at(idx)) : 0
+                    y: Math.min(Math.max(mouseArea.height - (setMaxValue * mouseArea.height / valueAxis.max) - height - Style.smallMargins, 0), mouseArea.height - height)
+                    width: tooltipLayout.implicitWidth + Style.smallMargins * 2
+                    height: tooltipLayout.implicitHeight + Style.smallMargins * 2
+
+                    ColumnLayout {
+                        id: tooltipLayout
+                        anchors {
+                            left: parent.left
+                            top: parent.top
+                            margins: Style.smallMargins
+                        }
+
+                        Label {
+                            text: d.config.toLongLabel(toolTip.timestamp)
+                            font: Style.smallFont
+                        }
+
+                        RowLayout {
+                            visible: root.hasProducers
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.blue
+                            }
+                            Label {
+                                text: d.startOffset !== undefined ? qsTr("Consumed: %1 kWh").arg(consumptionSet.at(toolTip.idx).toFixed(2)) : ""
+                                font: Style.extraSmallFont
+                            }
+                        }
+                        RowLayout {
+                            visible: root.hasProducers
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.yellow
+                            }
+                            Label {
+                                text: d.startOffset !== undefined ? qsTr("Produced: %1 kWh").arg(productionSet.at(toolTip.idx).toFixed(2)) : ""
+                                font: Style.extraSmallFont
+                            }
+                        }
+                        RowLayout {
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.red
+                            }
+                            Label {
+                                text: d.startOffset !== undefined ? qsTr("From grid: %1 kWh").arg(acquisitionSet.at(toolTip.idx).toFixed(2)) :""
+                                font: Style.extraSmallFont
+                            }
+                        }
+                        RowLayout {
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.green
+                            }
+                            Label {
+                                text: d.startOffset !== undefined ? qsTr("To grid: %1 kWh").arg(returnSet.at(toolTip.idx).toFixed(2)) : ""
+                                font: Style.extraSmallFont
+                            }
+                        }
                     }
                 }
             }
         }
     }
 }
-

nymea-app/ui/mainviews/energy/PowerConsumptionBalanceHistory.qml

@@ -2,18 +2,19 @@ import QtQuick 2.0
 import QtCharts 2.2
 import QtQuick.Layouts 1.2
 import QtQuick.Controls 2.2
-import QtGraphicalEffects 1.0
 import Nymea 1.0
 import "qrc:/ui/components"
 
 Item {
     id: root
 
-    property PowerBalanceLogs energyLogs: PowerBalanceLogs {
+    PowerBalanceLogs {
         id: powerBalanceLogs
         engine: _engine
-        startTime: dateTimeAxis.min
-        sampleRate: EnergyLogs.SampleRate15Mins
+        startTime: new Date(d.startTime.getTime() - (d.range * 60 * 1000))
+        endTime: new Date(d.endTime.getTime() + (d.range * 60 * 1000))
+        sampleRate: d.sampleRate
+        Component.onCompleted: fetchLogs()
     }
 
     property ThingsProxy batteries: ThingsProxy {
@@ -21,350 +22,552 @@ Item {
         shownInterfaces: ["energystorage"]
     }
 
-    Component.onCompleted: {
-        for (var i = 0; i < powerBalanceLogs.count; i++) {
-            var entry = energyLogs.powerBalanceLogs.get(i);
-            consumptionSeries.addEntry(entry)
-            selfProductionSeries.addEntry(entry)
-            storageSeries.addEntry(entry)
-            acquisitionSeries.addEntry(entry)
+    QtObject {
+        id: d
+        property date now: new Date()
+
+        readonly property int range: selectionTabs.currentValue.range
+        readonly property int sampleRate: selectionTabs.currentValue.sampleRate
+        readonly property int visibleValues: range / sampleRate
+
+        readonly property var startTime: {
+            var date = new Date(now);
+            date.setTime(date.getTime() - (range * 60 * 1000) + 2000);
+            print("setting starttime to", date, range)
+            return date;
+        }
+
+        readonly property var endTime: {
+            var date = new Date(now);
+            date.setTime(date.getTime() + 2000)
+            print("setting endtime to", date, range)
+            return date;
         }
     }
 
     Connections {
         target: powerBalanceLogs
-        onEntryAdded: {
-            consumptionSeries.addEntry(entry)
-            selfProductionSeries.addEntry(entry)
-            storageSeries.addEntry(entry)
-            acquisitionSeries.addEntry(entry)
 
-            if (dateTimeAxis.now < entry.timestamp) {
-                dateTimeAxis.now = entry.timestamp
-                zeroSeries.update(entry.timestamp)
+        onEntriesAdded: {
+//            print("entries added", index, entries.length)
+            for (var i = 0; i < entries.length; i++) {
+                var entry = entries[i]
+//                print("got entry", entry.timestamp)
+
+                zeroSeries.ensureValue(entry.timestamp)
+                // For debugging, to see if the other maths line up with the plain production graph
+//                consumptionSeries.insertEntry(index + i, entry)
+                selfProductionSeries.insertEntry(index + i, entry)
+                storageSeries.insertEntry(index + i, entry)
+                acquisitionSeries.insertEntry(index + i, entry)
+                if (entry.timestamp > d.now && new Date().getTime() - d.now.getTime() < 120000) {
+                    d.now = entry.timestamp
+                }
             }
         }
+
+        onEntriesRemoved: {
+            acquisitionUpperSeries.removePoints(index, count)
+            storageUpperSeries.removePoints(index, count)
+            selfProductionUpperSeries.removePoints(index, count)
+            consumptionUpperSeries.removePoints(index, count)
+            zeroSeries.shrink()
+        }
     }
 
-    Timer {
-        interval: 60000
-        repeat: true
-        onTriggered: {
-            var now = new Date()
-            if (dateTimeAxis.now < now) {
-                dateTimeAxis.now = now
-                zeroSeries.update(now)
-            }
-        }
-    }
-
-    ChartView {
-        id: chartView
+    ColumnLayout {
         anchors.fill: parent
-        backgroundColor: "transparent"
-        margins.left: 0
-        margins.right: 0
-        margins.bottom: 0
-        margins.top: 0
+        spacing: 0
 
-        title: qsTr("My consumption history")
-        titleColor: Style.foregroundColor
-
-        legend.alignment: Qt.AlignBottom
-        legend.labelColor: Style.foregroundColor
-        legend.font: Style.extraSmallFont
-
-
-        ValueAxis {
-            id: valueAxis
-            min: 0
-            max: Math.ceil(powerBalanceLogs.maxValue / 1000) * 1000
-            labelFormat: ""
-            gridLineColor: Style.tileOverlayColor
-            labelsVisible: false
-            lineVisible: false
-            titleVisible: false
-            shadesVisible: false
-    //        visible: false
+        Label {
+            Layout.fillWidth: true
+            Layout.margins: Style.smallMargins
+            horizontalAlignment: Text.AlignHCenter
+            text: qsTr("My consumption history")
+        }
 
+        SelectionTabs {
+            id: selectionTabs
+            Layout.fillWidth: true
+            Layout.leftMargin: Style.smallMargins
+            Layout.rightMargin: Style.smallMargins
+            currentIndex: 1
+            model: ListModel {
+                ListElement {
+                    modelData: qsTr("Hours")
+                    sampleRate: EnergyLogs.SampleRate1Min
+                    range: 180 // 3 Hours: 3 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Days")
+                    sampleRate: EnergyLogs.SampleRate15Mins
+                    range: 1440 // 1 Day: 24 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Weeks")
+                    sampleRate: EnergyLogs.SampleRate1Hour
+                    range: 10080 // 7 Days: 7 * 24 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Months")
+                    sampleRate: EnergyLogs.SampleRate3Hours
+                    range: 43200 // 30 Days: 30 * 24 * 60
+                }
+            }
+            onTabSelected: {
+                d.now = new Date()
+                powerBalanceLogs.fetchLogs()
+            }
         }
 
         Item {
-            id: labelsLayout
-            x: Style.smallMargins
-            y: chartView.plotArea.y
-            height: chartView.plotArea.height
-            width: chartView.plotArea.x - x
-            Repeater {
-                model: valueAxis.tickCount
-                delegate: Label {
-                    y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
-                    width: parent.width - Style.smallMargins
-                    horizontalAlignment: Text.AlignRight
-                    text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1))) / 1000).toFixed(2) + "kW"
-                    verticalAlignment: Text.AlignTop
-                    font: Style.extraSmallFont
-                }
+            Layout.fillWidth: true
+            Layout.fillHeight: true
+
+            Label {
+                x: chartView.x + chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                y: chartView.y + chartView.plotArea.y + Style.smallMargins
+                text: d.startTime.toLocaleDateString(Qt.locale(), Locale.LongFormat)
+                font: Style.smallFont
+                opacity: ((new Date().getTime() - d.now.getTime()) / d.sampleRate / 60000) > d.visibleValues ? .5 : 0
+                Behavior on opacity { NumberAnimation {} }
             }
 
-        }
+            ChartView {
+                id: chartView
+                anchors.fill: parent
+                backgroundColor: "transparent"
+                margins.left: 0
+                margins.right: 0
+                margins.bottom: 0
+                margins.top: 0
 
-        DateTimeAxis {
-            id: dateTimeAxis
-            property date now: new Date()
-            min: {
-                var date = new Date(now);
-                date.setTime(date.getTime() - (1000 * 60 * 60 * 24) + 2000);
-                return date;
-            }
-            max: {
-                var date = new Date(now);
-                date.setTime(date.getTime() + 2000)
-                return date;
-            }
-            format: "hh:mm"
-            labelsFont: Style.extraSmallFont
-            gridVisible: false
-            minorGridVisible: false
-            lineVisible: false
-            shadesVisible: false
-            labelsColor: Style.foregroundColor
-        }
+                legend.alignment: Qt.AlignBottom
+                legend.labelColor: Style.foregroundColor
+                legend.font: Style.extraSmallFont
 
-        // For debugging, to see the total graph and check if the other maths line up
-        AreaSeries {
-            id: consumptionSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: "blue"
-            borderWidth: 0
-            borderColor: color
-            opacity: .5
-            visible: false
-
-            lowerSeries: zeroSeries
-            upperSeries: LineSeries {
-                id: consumptionUpperSeries
-            }
-
-            function calculateValue(entry) {
-                return entry.consumption
-            }
-            function addEntry(entry) {
-                consumptionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
-            }
-        }
-
-
-        AreaSeries {
-            id: selfProductionSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: Style.green
-            borderWidth: 0
-            borderColor: color
-            name: qsTr("Self production")
-    //      visible: false
-
-            lowerSeries: LineSeries {
-                id: zeroSeries
-                XYPoint { x: dateTimeAxis.min.getTime(); y: 0 }
-                XYPoint { x: dateTimeAxis.max.getTime(); y: 0 }
-                function update(timestamp) {
-                    append(timestamp, 0);
-                    removePoints(1,1);
-                }
-            }
-
-            upperSeries: LineSeries {
-                id: selfProductionUpperSeries
-            }
-
-            function calculateValue(entry) {
-                var value = entry.consumption - Math.max(0, entry.acquisition);
-                if (entry.storage < 0) {
-                    value += entry.storage;
-                }
-                return value;
-            }
-
-            function addEntry(entry) {
-                selfProductionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
-            }
-        }
-
-        AreaSeries {
-            id: storageSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: Style.orange
-            borderWidth: 0
-            borderColor: color
-            name: qsTr("From battery")
-            visible: root.batteries.count > 0
-
-            lowerSeries: selfProductionUpperSeries
-            upperSeries: LineSeries {
-                id: storageUpperSeries
-            }
-
-            function calculateValue(entry) {
-                return selfProductionSeries.calculateValue(entry) + Math.abs(Math.min(0, entry.storage));
-            }
-
-            function addEntry(entry) {
-                storageUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
-            }
-        }
-
-
-        AreaSeries {
-            id: acquisitionSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: Style.red
-            borderWidth: 0
-            borderColor: color
-            name: qsTr("From grid")
-    //      visible: false
-
-            lowerSeries: storageUpperSeries
-            upperSeries: LineSeries {
-                id: acquisitionUpperSeries
-            }
-
-            function calculateValue(entry) {
-                return storageSeries.calculateValue(entry) + Math.max(0, entry.acquisition)
-            }
-            function addEntry(entry) {
-                acquisitionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
-            }
-        }
-    }
-
-
-    MouseArea {
-        id: mouseArea
-        anchors.fill: chartView
-        anchors.leftMargin: chartView.plotArea.x
-        anchors.topMargin: chartView.plotArea.y
-        anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
-        anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
-
-        hoverEnabled: true
-
-        Timer {
-            interval: 300
-            running: mouseArea.pressed
-            onTriggered: mouseArea.preventStealing = true
-        }
-        onReleased: mouseArea.preventStealing = false
-
-        Rectangle {
-            height: parent.height
-            width: 1
-            color: Style.foregroundColor
-            x: Math.min(mouseArea.width - 1, Math.max(0, mouseArea.mouseX))
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-        }
-
-
-        NymeaToolTip {
-            id: toolTip
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-
-            backgroundItem: chartView
-            backgroundRect: Qt.rect(mouseArea.x + toolTip.x, mouseArea.y + toolTip.y, toolTip.width, toolTip.height)
-
-
-            property int idx: consumptionUpperSeries.count - (Math.floor(mouseArea.mouseX * consumptionUpperSeries.count / mouseArea.width))
-            property int seriesIndex: Math.min(consumptionUpperSeries.count - 1, Math.max(0, consumptionUpperSeries.count - idx))
-
-            property int xOnRight: Math.max(0, mouseArea.mouseX) + Style.smallMargins
-            property int xOnLeft: Math.min(mouseArea.mouseX, mouseArea.width) - Style.smallMargins - width
-            x: xOnRight + width < mouseArea.width ? xOnRight : xOnLeft
-            property double maxValue: consumptionUpperSeries.at(seriesIndex).y
-            y: Math.min(Math.max(mouseArea.height - (maxValue * mouseArea.height / valueAxis.max) - height - Style.margins, 0), mouseArea.height - height)
-
-            width: tooltipLayout.implicitWidth + Style.smallMargins * 2
-            height: tooltipLayout.implicitHeight + Style.smallMargins * 2
-
-            ColumnLayout {
-                id: tooltipLayout
-                anchors {
-                    left: parent.left
-                    top: parent.top
-                    margins: Style.smallMargins
+                ActivityIndicator {
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    visible: powerBalanceLogs.fetchingData
+                    opacity: .5
                 }
                 Label {
-                    text: new Date(consumptionUpperSeries.at(toolTip.seriesIndex).x).toLocaleString(Qt.locale(), Locale.ShortFormat)
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    text: qsTr("No data available")
+                    visible: !powerBalanceLogs.fetchingData && (powerBalanceLogs.count == 0 || powerBalanceLogs.get(0).timestamp > d.now)
                     font: Style.smallFont
+                    opacity: .5
                 }
 
-                Label {
-                    property double value: acquisitionUpperSeries.at(toolTip.seriesIndex).y
-                    property bool translate: value >= 1000
-                    property double translatedValue: value / (translate ? 1000 : 1)
-                    text: qsTr("Total consumption: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                    font: Style.extraSmallFont
+                ValueAxis {
+                    id: valueAxis
+                    min: 0
+                    max: Math.ceil(powerBalanceLogs.maxValue / 100) * 100
+                    labelFormat: ""
+                    gridLineColor: Style.tileOverlayColor
+                    labelsVisible: false
+                    lineVisible: false
+                    titleVisible: false
+                    shadesVisible: false
+            //        visible: false
+
                 }
 
-                RowLayout {
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.green
+                Item {
+                    id: labelsLayout
+                    x: Style.smallMargins
+                    y: chartView.plotArea.y
+                    height: chartView.plotArea.height
+                    width: chartView.plotArea.x - x
+                    Repeater {
+                        model: valueAxis.tickCount
+                        delegate: Label {
+                            y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
+                            width: parent.width - Style.smallMargins
+                            horizontalAlignment: Text.AlignRight
+                            text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1))) / 1000).toFixed(2) + "kW"
+                            verticalAlignment: Text.AlignTop
+                            font: Style.extraSmallFont
+                        }
                     }
 
-                    Label {
-                        // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
-                        Component.onCompleted: lowerSeries = selfProductionSeries.lowerSeries
-                        property XYSeries lowerSeries: null
+                }
 
-                        property double value: selfProductionUpperSeries.at(toolTip.seriesIndex).y - lowerSeries.at(toolTip.seriesIndex).y
-                        property bool translate: value >= 1000
-                        property double translatedValue: value / (translate ? 1000 : 1)
-                        text: qsTr("Self production: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                        font: Style.extraSmallFont
+                DateTimeAxis {
+                    id: dateTimeAxis
+                    min: d.startTime
+                    max: d.endTime
+                    format: {
+                        switch (selectionTabs.currentValue.sampleRate) {
+                        case EnergyLogs.SampleRate1Min:
+                        case EnergyLogs.SampleRate15Mins:
+                            return "hh:mm"
+                        case EnergyLogs.SampleRate1Hour:
+                        case EnergyLogs.SampleRate3Hours:
+                        case EnergyLogs.SampleRate1Day:
+                            return "dd.MM."
+                        }
+                    }
+                    tickCount: {
+                        switch (selectionTabs.currentValue.sampleRate) {
+                        case EnergyLogs.SampleRate1Min:
+                        case EnergyLogs.SampleRate15Mins:
+                            return root.width > 500 ? 13 : 7
+                        case EnergyLogs.SampleRate1Hour:
+                            return 7
+                        case EnergyLogs.SampleRate3Hours:
+                        case EnergyLogs.SampleRate1Day:
+                            return root.width > 500 ? 12 : 6
+                        }
+                    }
+                    labelsFont: Style.extraSmallFont
+                    gridVisible: false
+                    minorGridVisible: false
+                    lineVisible: false
+                    shadesVisible: false
+                    labelsColor: Style.foregroundColor
+                }
+
+                // For debugging, to see the total graph and check if the other maths line up
+                AreaSeries {
+                    id: consumptionSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: "blue"
+                    borderWidth: 0
+                    borderColor: color
+                    opacity: .5
+                    visible: false
+
+                    lowerSeries: zeroSeries
+                    upperSeries: LineSeries {
+                        id: consumptionUpperSeries
+                    }
+
+                    function calculateValue(entry) {
+                        return entry.consumption
+                    }
+                    function addEntry(entry) {
+                        consumptionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        consumptionUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
                     }
                 }
-                RowLayout {
+
+
+                AreaSeries {
+                    id: selfProductionSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: Style.green
+                    borderWidth: 0
+                    borderColor: color
+                    name: qsTr("Self production")
+            //      visible: false
+
+                    lowerSeries: LineSeries {
+                        id: zeroSeries
+                        XYPoint { x: dateTimeAxis.min.getTime(); y: 0 }
+                        XYPoint { x: dateTimeAxis.max.getTime(); y: 0 }
+                        function ensureValue(timestamp) {
+                            if (count == 0) {
+                                append(timestamp, 0)
+                            } else if (count == 1) {
+                                if (timestamp.getTime() < at(0).x) {
+                                    insert(0, timestamp, 0)
+                                } else {
+                                    append(timestamp, 0)
+                                }
+                            } else {
+                                if (timestamp.getTime() < at(0).x) {
+                                    remove(0)
+                                    insert(0, timestamp, 0)
+                                } else if (timestamp.getTime() > at(1).x) {
+                                    remove(1)
+                                    append(timestamp, 0)
+                                }
+                            }
+                        }
+                        function shrink() {
+                            clear();
+                            if (powerBalanceLogs.count > 0) {
+                                ensureValue(powerBalanceLogs.get(0).timestamp)
+                                ensureValue(powerBalanceLogs.get(powerBalanceLogs.count-1).timestamp)
+                            }
+                        }
+                    }
+
+                    upperSeries: LineSeries {
+                        id: selfProductionUpperSeries
+                    }
+
+                    function calculateValue(entry) {
+                        var value = entry.consumption - Math.max(0, entry.acquisition);
+                        if (entry.storage < 0) {
+                            value += entry.storage;
+                        }
+                        return value;
+                    }
+
+                    function addEntry(entry) {
+                        selfProductionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        selfProductionUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                }
+
+                AreaSeries {
+                    id: storageSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: Style.orange
+                    borderWidth: 0
+                    borderColor: color
+                    name: qsTr("From battery")
                     visible: root.batteries.count > 0
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.orange
+
+                    lowerSeries: selfProductionUpperSeries
+                    upperSeries: LineSeries {
+                        id: storageUpperSeries
                     }
 
-                    Label {
-                        // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
-                        Component.onCompleted: lowerSeries = storageSeries.lowerSeries
-                        property XYSeries lowerSeries: null
+                    function calculateValue(entry) {
+                        return selfProductionSeries.calculateValue(entry) + Math.abs(Math.min(0, entry.storage));
+                    }
 
-                        property double value: storageUpperSeries.at(toolTip.seriesIndex).y - lowerSeries.at(toolTip.seriesIndex).y
-                        property bool translate: value >= 1000
-                        property double translatedValue: value / (translate ? 1000 : 1)
-                        text: qsTr("From battery: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                        font: Style.extraSmallFont
+                    function addEntry(entry) {
+                        storageUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        storageUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
                     }
                 }
-                RowLayout {
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.red
+
+
+                AreaSeries {
+                    id: acquisitionSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: Style.red
+                    borderWidth: 0
+                    borderColor: color
+                    name: qsTr("From grid")
+            //      visible: false
+
+                    lowerSeries: storageUpperSeries
+                    upperSeries: LineSeries {
+                        id: acquisitionUpperSeries
                     }
 
-                    Label {
-                        // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
-                        Component.onCompleted: lowerSeries = acquisitionSeries.lowerSeries
-                        property XYSeries lowerSeries: null
+                    function calculateValue(entry) {
+                        return storageSeries.calculateValue(entry) + Math.max(0, entry.acquisition)
+                    }
+                    function addEntry(entry) {
+                        acquisitionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        acquisitionUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                }
+            }
 
-                        property double value: acquisitionUpperSeries.at(toolTip.seriesIndex).y - lowerSeries.at(toolTip.seriesIndex).y
-                        property bool translate: value >= 1000
-                        property double translatedValue: value / (translate ? 1000 : 1)
-                        text: qsTr("From grid: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                        font: Style.extraSmallFont
+
+
+            MouseArea {
+                id: mouseArea
+                anchors.fill: chartView
+                anchors.leftMargin: chartView.plotArea.x
+                anchors.topMargin: chartView.plotArea.y
+                anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
+                anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
+
+                hoverEnabled: true
+                preventStealing: tooltipping || dragging
+
+                property int startMouseX: 0
+                property bool dragging: false
+                property bool tooltipping: false
+
+                property var startDatetime: null
+
+                Timer {
+                    interval: 300
+                    running: mouseArea.pressed
+                    onTriggered: {
+                        if (!mouseArea.dragging) {
+                            mouseArea.tooltipping = true
+                        }
+                    }
+                }
+                onReleased: {
+                    if (mouseArea.dragging) {
+                        powerBalanceLogs.fetchLogs()
+                        mouseArea.dragging = false;
+                    }
+
+                    mouseArea.tooltipping = false;
+                }
+
+                onPressed: {
+                    startMouseX = mouseX
+                    startDatetime = d.now
+                }
+
+                onDoubleClicked: {
+                    if (selectionTabs.currentIndex == 0) {
+                        return;
+                    }
+
+                    var idx = Math.ceil(mouseArea.mouseX * d.visibleValues / mouseArea.width)
+                    var timestamp = new Date(d.startTime.getTime() + (idx * d.sampleRate * 60000))
+                    selectionTabs.currentIndex--
+                    d.now = new Date(timestamp.getTime() + (d.visibleValues / 2) * d.sampleRate * 60000)
+                    powerBalanceLogs.fetchLogs()
+                }
+
+                onMouseXChanged: {
+                    if (!pressed || mouseArea.tooltipping) {
+                        return;
+                    }
+                    if (Math.abs(startMouseX - mouseX) < 10) {
+                        return;
+                    }
+                    dragging = true
+
+                    var dragDelta = startMouseX - mouseX
+                    var totalTime = d.endTime.getTime() - d.startTime.getTime()
+                    // dragDelta : timeDelta = width : totalTime
+                    var timeDelta = dragDelta * totalTime / mouseArea.width
+                    print("dragging", dragDelta, totalTime, mouseArea.width)
+                    d.now = new Date(Math.min(new Date(), new Date(startDatetime.getTime() + timeDelta)))
+                }
+
+                onWheel: {
+                    startDatetime = d.now
+                    var totalTime = d.endTime.getTime() - d.startTime.getTime()
+                    // pixelDelta : timeDelta = width : totalTime
+                    var timeDelta = wheel.pixelDelta.x * totalTime / mouseArea.width
+                    print("wheeling", wheel.pixelDelta.x, totalTime, mouseArea.width)
+                    d.now = new Date(Math.min(new Date(), new Date(startDatetime.getTime() - timeDelta)))
+                    wheelStopTimer.restart()
+                }
+                Timer {
+                    id: wheelStopTimer
+                    interval: 300
+                    repeat: false
+                    onTriggered: powerBalanceLogs.fetchLogs()
+                }
+
+                Rectangle {
+                    height: parent.height
+                    width: 1
+                    color: Style.foregroundColor
+                    x: Math.min(mouseArea.width, Math.max(0, mouseArea.mouseX))
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+                }
+
+                NymeaToolTip {
+                    id: toolTip
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+
+                    backgroundItem: chartView
+                    backgroundRect: Qt.rect(mouseArea.x + toolTip.x, mouseArea.y + toolTip.y, toolTip.width, toolTip.height)
+
+                    property int idx: Math.ceil(mouseArea.mouseX * d.visibleValues / mouseArea.width)
+                    property var timestamp: new Date(d.startTime.getTime() + (idx * d.sampleRate * 60000))
+                    property PowerBalanceLogEntry entry: powerBalanceLogs.find(timestamp)
+
+                    property int xOnRight: Math.max(0, mouseArea.mouseX) + Style.smallMargins
+                    property int xOnLeft: Math.min(mouseArea.mouseX, mouseArea.width) - Style.smallMargins - width
+                    x: xOnRight + width < mouseArea.width ? xOnRight : xOnLeft
+                    property double maxValue: toolTip.entry ? Math.max(0, entry.consumption) : 0
+                    y: Math.min(Math.max(mouseArea.height - (maxValue * mouseArea.height / valueAxis.max) - height - Style.margins, 0), mouseArea.height - height)
+
+                    width: tooltipLayout.implicitWidth + Style.smallMargins * 2
+                    height: tooltipLayout.implicitHeight + Style.smallMargins * 2
+
+                    ColumnLayout {
+                        id: tooltipLayout
+                        anchors {
+                            left: parent.left
+                            top: parent.top
+                            margins: Style.smallMargins
+                        }
+                        Label {
+                            text: toolTip.timestamp.toLocaleString(Qt.locale(), Locale.ShortFormat)
+                            font: Style.smallFont
+                        }
+
+                        Label {
+                            property double value: toolTip.entry ? Math.max(0, toolTip.entry.consumption) : 0
+                            property bool translate: value >= 1000
+                            property double translatedValue: value / (translate ? 1000 : 1)
+                            text: qsTr("Total consumption: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                            font: Style.extraSmallFont
+                        }
+
+                        RowLayout {
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.green
+                            }
+
+                            Label {
+                                // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
+                                Component.onCompleted: lowerSeries = selfProductionSeries.lowerSeries
+                                property XYSeries lowerSeries: null
+
+                                property double value: toolTip.entry ? Math.max(0, -toolTip.entry.production) : 0
+                                property bool translate: value >= 1000
+                                property double translatedValue: value / (translate ? 1000 : 1)
+                                text: qsTr("Self production: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                                font: Style.extraSmallFont
+                            }
+                        }
+                        RowLayout {
+                            visible: root.batteries.count > 0
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.orange
+                            }
+
+                            Label {
+                                // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
+                                Component.onCompleted: lowerSeries = storageSeries.lowerSeries
+                                property XYSeries lowerSeries: null
+
+                                property double value: toolTip.entry ? Math.max(0, -toolTip.entry.storage) : 0
+                                property bool translate: value >= 1000
+                                property double translatedValue: value / (translate ? 1000 : 1)
+                                text: qsTr("From battery: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                                font: Style.extraSmallFont
+                            }
+                        }
+                        RowLayout {
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.red
+                            }
+
+                            Label {
+                                // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
+                                Component.onCompleted: lowerSeries = acquisitionSeries.lowerSeries
+                                property XYSeries lowerSeries: null
+
+                                property double value: toolTip.entry ? Math.max(0, toolTip.entry.acquisition) : 0
+                                property bool translate: value >= 1000
+                                property double translatedValue: value / (translate ? 1000 : 1)
+                                text: qsTr("From grid: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                                font: Style.extraSmallFont
+                            }
+                        }
                     }
                 }
             }

nymea-app/ui/mainviews/energy/PowerProductionBalanceHistory.qml

@@ -8,10 +8,13 @@ import "qrc:/ui/components"
 Item {
     id: root
 
-    property PowerBalanceLogs energyLogs: PowerBalanceLogs {
+    PowerBalanceLogs {
         id: powerBalanceLogs
         engine: _engine
-        startTime: dateTimeAxis.min
+        startTime: new Date(d.startTime.getTime() - d.range * 60000)
+        endTime: new Date(d.endTime.getTime() + d.range * 60000)
+        sampleRate: d.sampleRate
+        Component.onCompleted: fetchLogs()
     }
 
     property ThingsProxy batteries: ThingsProxy {
@@ -19,347 +22,550 @@ Item {
         shownInterfaces: ["energystorage"]
     }
 
-    Component.onCompleted: {
-        for (var i = 0; i < powerBalanceLogs.count; i++) {
-            var entry = energyLogs.powerBalanceLogs.get(i);
-            productionSeries.addEntry(entry)
-            selfConsumptionSeries.addEntry(entry)
-            storageSeries.addEntry(entry)
-            acquisitionSeries.addEntry(entry)
+    QtObject {
+        id: d
+        property date now: new Date()
+
+        readonly property int range: selectionTabs.currentValue.range
+        readonly property int sampleRate: selectionTabs.currentValue.sampleRate
+        readonly property int visibleValues: range / sampleRate
+
+        readonly property var startTime: {
+            var date = new Date(now);
+            date.setTime(date.getTime() - range * 60000 + 2000);
+            return date;
+        }
+
+        readonly property var endTime: {
+            var date = new Date(now);
+            date.setTime(date.getTime() + 2000)
+            return date;
         }
     }
 
     Connections {
         target: powerBalanceLogs
-        onEntryAdded: {
-            productionSeries.addEntry(entry)
-            selfConsumptionSeries.addEntry(entry)
-            storageSeries.addEntry(entry)
-            acquisitionSeries.addEntry(entry)
 
-            if (dateTimeAxis.now < entry.timestamp) {
-                dateTimeAxis.now = entry.timestamp
-                zeroSeries.update(entry.timestamp)
+        onEntriesAdded: {
+//            print("entries added", index, entries.length)
+            for (var i = 0; i < entries.length; i++) {
+                var entry = entries[i]
+//                print("got entry", entry.timestamp)
+
+                zeroSeries.ensureValue(entry.timestamp)
+                // For debugging, to see if the other maths line up with the plain production graph
+//                productionSeries.insertEntry(index + i, entry)
+                selfConsumptionSeries.insertEntry(index + i, entry)
+                storageSeries.insertEntry(index + i, entry)
+                acquisitionSeries.insertEntry(index + i, entry)
+                if (entry.timestamp > d.now && new Date().getTime() - d.now.getTime() < 120000) {
+                    d.now = entry.timestamp
+                }
             }
         }
+
+        onEntriesRemoved: {
+            acquisitionUpperSeries.removePoints(index, count)
+            storageUpperSeries.removePoints(index, count)
+            selfConsumptionUpperSeries.removePoints(index, count)
+            productionUpperSeries.removePoints(index, count)
+            zeroSeries.shrink()
+        }
     }
 
-    Timer {
-        interval: 60000
-        repeat: true
-        onTriggered: {
-            var now = new Date()
-            if (dateTimeAxis.now < now) {
-                dateTimeAxis.now = now
-                zeroSeries.update(now)
-            }
-        }
-    }
-
-    ChartView {
-        id: chartView
+    ColumnLayout {
         anchors.fill: parent
+        spacing: 0
 
-        backgroundColor: "transparent"
-        margins.left: 0
-        margins.right: 0
-        margins.bottom: 0
-        margins.top: 0
+        Label {
+            Layout.fillWidth: true
+            Layout.margins: Style.smallMargins
+            horizontalAlignment: Text.AlignHCenter
+            text: qsTr("My production history")
+        }
 
-        title: qsTr("My production history")
-        titleColor: Style.foregroundColor
-
-        legend.alignment: Qt.AlignBottom
-        legend.labelColor: Style.foregroundColor
-        legend.font: Style.extraSmallFont
-
-
-        ValueAxis {
-            id: valueAxis
-            min: 0
-            max: Math.ceil(-powerBalanceLogs.minValue / 1000) * 1000
-            labelFormat: ""
-            gridLineColor: Style.tileOverlayColor
-            labelsVisible: false
-            lineVisible: false
-            titleVisible: false
-            shadesVisible: false
+        SelectionTabs {
+            id: selectionTabs
+            Layout.fillWidth: true
+            Layout.leftMargin: Style.smallMargins
+            Layout.rightMargin: Style.smallMargins
+            currentIndex: 1
+            model: ListModel {
+                ListElement {
+                    modelData: qsTr("Hours")
+                    sampleRate: EnergyLogs.SampleRate1Min
+                    range: 180 // 3 Hours: 3 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Days")
+                    sampleRate: EnergyLogs.SampleRate15Mins
+                    range: 1440 // 1 Day: 24 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Weeks")
+                    sampleRate: EnergyLogs.SampleRate1Hour
+                    range: 10080 // 7 Days: 7 * 24 * 60
+                }
+                ListElement {
+                    modelData: qsTr("Months")
+                    sampleRate: EnergyLogs.SampleRate3Hours
+                    range: 43200 // 30 Days: 30 * 24 * 60
+                }
+            }
+            onTabSelected: {
+                d.now = new Date()
+                powerBalanceLogs.fetchLogs()
+            }
         }
 
         Item {
-            id: labelsLayout
-            x: Style.smallMargins
-            y: chartView.plotArea.y
-            height: chartView.plotArea.height
-            width: chartView.plotArea.x - x
-            Repeater {
-                model: valueAxis.tickCount
-                delegate: Label {
-                    y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
-                    width: parent.width - Style.smallMargins
-                    horizontalAlignment: Text.AlignRight
-                    text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1))) / 1000).toFixed(2) + "kW"
-                    verticalAlignment: Text.AlignTop
-                    font: Style.extraSmallFont
-                }
-            }
-        }
+            Layout.fillWidth: true
+            Layout.fillHeight: true
 
-        DateTimeAxis {
-            id: dateTimeAxis
-            property date now: new Date()
-            min: {
-                var date = new Date(now);
-                date.setTime(date.getTime() - (1000 * 60 * 60 * 24) + 2000);
-                return date;
-            }
-            max: {
-                var date = new Date(now);
-                date.setTime(date.getTime() + 2000)
-                return date;
-            }
-            format: "hh:mm"
-            labelsFont: Style.extraSmallFont
-            gridVisible: false
-            minorGridVisible: false
-            lineVisible: false
-            shadesVisible: false
-            labelsColor: Style.foregroundColor
-        }
-
-        // For debugging, to see if the other maths line up with the plain production graph
-        AreaSeries {
-            id: productionSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: "blue"
-            borderWidth: 0
-            borderColor: color
-            opacity: .5
-            name: "Total production"
-            visible: false
-
-            function calculateValue(entry) {
-                return Math.abs(Math.min(0, entry.production))
-            }
-            function addEntry(entry) {
-                productionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+            Label {
+                x: chartView.x + chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                y: chartView.y + chartView.plotArea.y + Style.smallMargins
+                text: d.startTime.toLocaleDateString(Qt.locale(), Locale.LongFormat)
+                font: Style.smallFont
+                opacity: ((new Date().getTime() - d.now.getTime()) / d.sampleRate / 60000) > d.visibleValues ? .5 : 0
+                Behavior on opacity { NumberAnimation {} }
             }
 
-            lowerSeries: zeroSeries
-            upperSeries: LineSeries {
-                id: productionUpperSeries
-            }
-        }
+            ChartView {
+                id: chartView
+                anchors.fill: parent
+                backgroundColor: "transparent"
+                margins.left: 0
+                margins.right: 0
+                margins.bottom: 0
+                margins.top: 0
 
-        AreaSeries {
-            id: selfConsumptionSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: Style.red
-            borderWidth: 0
-            borderColor: color
-            name: qsTr("Consumed")
-    //        visible: false
+                legend.alignment: Qt.AlignBottom
+                legend.labelColor: Style.foregroundColor
+                legend.font: Style.extraSmallFont
 
-            function calculateValue(entry) {
-                return Math.abs(Math.min(0, entry.production)) - Math.abs(Math.min(0, entry.acquisition)) - Math.max(0, entry.storage)
-            }
-
-            function addEntry(entry) {
-                selfConsumptionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
-            }
-
-            lowerSeries: LineSeries {
-                id: zeroSeries
-                XYPoint { x: dateTimeAxis.min.getTime(); y: 0 }
-                XYPoint { x: dateTimeAxis.max.getTime(); y: 0 }
-                function update(timestamp) {
-                    append(timestamp, 0);
-                    removePoints(1,1);
-                }
-            }
-
-            upperSeries: LineSeries {
-                id: selfConsumptionUpperSeries
-            }
-        }
-
-        AreaSeries {
-            id: storageSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: Style.orange
-            borderWidth: 0
-            borderColor: color
-            visible: root.batteries.count > 0
-            name: qsTr("To battery")
-
-
-            function calculateValue(entry) {
-                return selfConsumptionSeries.calculateValue(entry) + Math.abs(Math.max(0, entry.storage));
-            }
-
-            function addEntry(entry) {
-                storageUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
-            }
-
-            lowerSeries: selfConsumptionUpperSeries
-            upperSeries: LineSeries {
-                id: storageUpperSeries
-            }
-        }
-
-
-        AreaSeries {
-            id: acquisitionSeries
-            axisX: dateTimeAxis
-            axisY: valueAxis
-            color: Style.green
-            borderWidth: 0
-            borderColor: color
-            name: qsTr("To grid")
-    //        visible: false
-
-            function calculateValue(entry) {
-                return storageSeries.calculateValue(entry) + Math.abs(Math.min(0, entry.acquisition))
-            }
-            function addEntry(entry) {
-                acquisitionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
-            }
-
-            lowerSeries: storageUpperSeries
-            upperSeries: LineSeries {
-                id: acquisitionUpperSeries
-            }
-        }
-    }
-
-    MouseArea {
-        id: mouseArea
-        anchors.fill: parent
-        anchors.leftMargin: chartView.plotArea.x
-        anchors.topMargin: chartView.plotArea.y
-        anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
-        anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
-
-        hoverEnabled: true
-
-        Timer {
-            interval: 300
-            running: mouseArea.pressed
-            onTriggered: mouseArea.preventStealing = true
-        }
-        onReleased: mouseArea.preventStealing = false
-
-        Rectangle {
-            height: parent.height
-            width: 1
-            color: Style.foregroundColor
-            x: Math.min(mouseArea.width, Math.max(0, mouseArea.mouseX))
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-        }
-
-        NymeaToolTip {
-            id: toolTip
-            visible: mouseArea.containsMouse || mouseArea.preventStealing
-
-            backgroundItem: chartView
-            backgroundRect: Qt.rect(mouseArea.x + toolTip.x, mouseArea.y + toolTip.y, toolTip.width, toolTip.height)
-
-            property int idx: productionUpperSeries.count - Math.floor(mouseArea.mouseX * productionUpperSeries.count / mouseArea.width)
-            property int seriesIndex: Math.min(productionUpperSeries.count - 1, Math.max(0, productionUpperSeries.count - idx))
-
-            property int xOnRight: Math.max(0, mouseArea.mouseX) + Style.smallMargins
-            property int xOnLeft: Math.min(mouseArea.mouseX, mouseArea.width) - Style.smallMargins - width
-            x: xOnRight + width < mouseArea.width ? xOnRight : xOnLeft
-            property double maxValue: productionUpperSeries.at(seriesIndex).y
-            y: Math.min(Math.max(mouseArea.height - (maxValue * mouseArea.height / valueAxis.max) - height - Style.margins, 0), mouseArea.height - height)
-
-            width: tooltipLayout.implicitWidth + Style.smallMargins * 2
-            height: tooltipLayout.implicitHeight + Style.smallMargins * 2
-
-            ColumnLayout {
-                id: tooltipLayout
-                anchors {
-                    left: parent.left
-                    top: parent.top
-                    margins: Style.smallMargins
+                ActivityIndicator {
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    visible: powerBalanceLogs.fetchingData
+                    opacity: .5
                 }
                 Label {
-                    text: new Date(selfConsumptionUpperSeries.at(toolTip.seriesIndex).x).toLocaleString(Qt.locale(), Locale.ShortFormat)
+                    x: chartView.plotArea.x + (chartView.plotArea.width - width) / 2
+                    y: chartView.plotArea.y + (chartView.plotArea.height - height) / 2 + (chartView.plotArea.height / 8)
+                    text: qsTr("No data available")
+                    visible: !powerBalanceLogs.fetchingData && (powerBalanceLogs.count == 0 || powerBalanceLogs.get(0).timestamp > d.now)
                     font: Style.smallFont
+                    opacity: .5
                 }
 
-                Label {
-                    property double value: acquisitionUpperSeries.at(toolTip.seriesIndex).y
-                    property bool translate: value >= 1000
-                    property double translatedValue: value / (translate ? 1000 : 1)
-                    text: qsTr("Total production: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                    font: Style.extraSmallFont
+                ValueAxis {
+                    id: valueAxis
+                    min: 0
+                    max: Math.ceil(-powerBalanceLogs.minValue / 100) * 100
+                    labelFormat: ""
+                    gridLineColor: Style.tileOverlayColor
+                    labelsVisible: false
+                    lineVisible: false
+                    titleVisible: false
+                    shadesVisible: false
                 }
-
-                RowLayout {
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.red
-                    }
-
-                    Label {
-                        // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
-                        Component.onCompleted: lowerSeries = selfConsumptionSeries.lowerSeries
-                        property XYSeries lowerSeries: null
-
-                        property double value: selfConsumptionUpperSeries.at(toolTip.seriesIndex).y - lowerSeries.at(toolTip.seriesIndex).y
-                        property bool translate: value >= 1000
-                        property double translatedValue: value / (translate ? 1000 : 1)
-                        text: qsTr("Consumed: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                        font: Style.extraSmallFont
+                Item {
+                    id: labelsLayout
+                    x: Style.smallMargins
+                    y: chartView.plotArea.y
+                    height: chartView.plotArea.height
+                    width: chartView.plotArea.x - x
+                    Repeater {
+                        model: valueAxis.tickCount
+                        delegate: Label {
+                            y: parent.height / (valueAxis.tickCount - 1) * index - font.pixelSize / 2
+                            width: parent.width - Style.smallMargins
+                            horizontalAlignment: Text.AlignRight
+                            text: ((valueAxis.max - (index * valueAxis.max / (valueAxis.tickCount - 1))) / 1000).toFixed(2) + "kW"
+                            verticalAlignment: Text.AlignTop
+                            font: Style.extraSmallFont
+                        }
                     }
                 }
-                RowLayout {
+
+                DateTimeAxis {
+                    id: dateTimeAxis
+                    min: d.startTime
+                    max: d.endTime
+                    format: {
+                        switch (selectionTabs.currentValue.sampleRate) {
+                        case EnergyLogs.SampleRate1Min:
+                        case EnergyLogs.SampleRate15Mins:
+                            return "hh:mm"
+                        case EnergyLogs.SampleRate1Hour:
+                        case EnergyLogs.SampleRate3Hours:
+                        case EnergyLogs.SampleRate1Day:
+                            return "dd.MM."
+                        }
+                    }
+                    tickCount: {
+                        switch (selectionTabs.currentValue.sampleRate) {
+                        case EnergyLogs.SampleRate1Min:
+                        case EnergyLogs.SampleRate15Mins:
+                            return root.width > 500 ? 13 : 7
+                        case EnergyLogs.SampleRate1Hour:
+                            return 7
+                        case EnergyLogs.SampleRate3Hours:
+                        case EnergyLogs.SampleRate1Day:
+                            return root.width > 500 ? 12 : 6
+                        }
+                    }
+                    labelsFont: Style.extraSmallFont
+                    gridVisible: false
+                    minorGridVisible: false
+                    lineVisible: false
+                    shadesVisible: false
+                    labelsColor: Style.foregroundColor
+                }
+
+                // For debugging, to see if the other maths line up with the plain production graph
+                AreaSeries {
+                    id: productionSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: "blue"
+                    borderWidth: 0
+                    borderColor: color
+                    opacity: .5
+                    name: "Total production"
+                    visible: false
+
+                    function calculateValue(entry) {
+                        return Math.abs(Math.min(0, entry.production))
+                    }
+                    function addEntry(entry) {
+                        productionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        productionUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
+                    }
+
+                    lowerSeries: zeroSeries
+                    upperSeries: LineSeries {
+                        id: productionUpperSeries
+                    }
+                }
+
+                AreaSeries {
+                    id: selfConsumptionSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: Style.red
+                    borderWidth: 0
+                    borderColor: color
+                    name: qsTr("Consumed")
+            //        visible: false
+
+                    lowerSeries: LineSeries {
+                        id: zeroSeries
+                        XYPoint { x: dateTimeAxis.min.getTime(); y: 0 }
+                        XYPoint { x: dateTimeAxis.max.getTime(); y: 0 }
+                        function ensureValue(timestamp) {
+                            if (count == 0) {
+                                append(timestamp, 0)
+                            } else if (count == 1) {
+                                if (timestamp.getTime() < at(0).x) {
+                                    insert(0, timestamp, 0)
+                                } else {
+                                    append(timestamp, 0)
+                                }
+                            } else {
+                                if (timestamp.getTime() < at(0).x) {
+                                    remove(0)
+                                    insert(0, timestamp, 0)
+                                } else if (timestamp.getTime() > at(1).x) {
+                                    remove(1)
+                                    append(timestamp, 0)
+                                }
+                            }
+                        }
+                        function shrink() {
+                            clear();
+                            if (powerBalanceLogs.count > 0) {
+                                ensureValue(powerBalanceLogs.get(0).timestamp)
+                                ensureValue(powerBalanceLogs.get(powerBalanceLogs.count-1).timestamp)
+                            }
+                        }
+                    }
+
+                    upperSeries: LineSeries {
+                        id: selfConsumptionUpperSeries
+                    }
+
+
+                    function calculateValue(entry) {
+                        return Math.max(0, -entry.production) - Math.max(0, -entry.acquisition) - Math.max(0, entry.storage)
+                    }
+
+                    function addEntry(entry) {
+                        selfConsumptionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        selfConsumptionUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                }
+
+                AreaSeries {
+                    id: storageSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: Style.orange
+                    borderWidth: 0
+                    borderColor: color
                     visible: root.batteries.count > 0
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.orange
+                    name: qsTr("To battery")
+
+
+                    function calculateValue(entry) {
+                        return selfConsumptionSeries.calculateValue(entry) + Math.max(0, entry.storage);
                     }
 
-                    Label {
-                        // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
-                        Component.onCompleted: lowerSeries = storageSeries.lowerSeries
-                        property XYSeries lowerSeries: null
+                    function addEntry(entry) {
+                        storageUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        storageUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
+                    }
 
-                        property double value: storageUpperSeries.at(toolTip.seriesIndex).y - lowerSeries.at(toolTip.seriesIndex).y
-                        property bool translate: value >= 1000
-                        property double translatedValue: value / (translate ? 1000 : 1)
-                        text: qsTr("To battery: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                        font: Style.extraSmallFont
+                    lowerSeries: selfConsumptionUpperSeries
+                    upperSeries: LineSeries {
+                        id: storageUpperSeries
                     }
                 }
-                RowLayout {
-                    Rectangle {
-                        width: Style.extraSmallFont.pixelSize
-                        height: width
-                        color: Style.green
+
+
+                AreaSeries {
+                    id: acquisitionSeries
+                    axisX: dateTimeAxis
+                    axisY: valueAxis
+                    color: Style.green
+                    borderWidth: 0
+                    borderColor: color
+                    name: qsTr("To grid")
+            //        visible: false
+
+                    function calculateValue(entry) {
+                        return storageSeries.calculateValue(entry) + Math.max(0, -entry.acquisition)
+                    }
+                    function addEntry(entry) {
+                        acquisitionUpperSeries.append(entry.timestamp.getTime(), calculateValue(entry))
+                    }
+                    function insertEntry(index, entry) {
+                        acquisitionUpperSeries.insert(index, entry.timestamp.getTime(), calculateValue(entry))
                     }
 
-                    Label {
-                        // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
-                        Component.onCompleted: lowerSeries = acquisitionSeries.lowerSeries
-                        property XYSeries lowerSeries: null
-
-                        property double value: acquisitionUpperSeries.at(toolTip.seriesIndex).y - lowerSeries.at(toolTip.seriesIndex).y
-                        property bool translate: value >= 1000
-                        property double translatedValue: value / (translate ? 1000 : 1)
-                        text: qsTr("To grid: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
-                        font: Style.extraSmallFont
+                    lowerSeries: storageUpperSeries
+                    upperSeries: LineSeries {
+                        id: acquisitionUpperSeries
                     }
                 }
             }
+
+            MouseArea {
+                id: mouseArea
+                anchors.fill: parent
+                anchors.leftMargin: chartView.plotArea.x
+                anchors.topMargin: chartView.plotArea.y
+                anchors.rightMargin: chartView.width - chartView.plotArea.width - chartView.plotArea.x
+                anchors.bottomMargin: chartView.height - chartView.plotArea.height - chartView.plotArea.y
+
+                hoverEnabled: true
+                preventStealing: tooltipping || dragging
+
+                property int startMouseX: 0
+                property bool dragging: false
+                property bool tooltipping: false
+
+                property var startDatetime: null
+
+                Timer {
+                    interval: 300
+                    running: mouseArea.pressed
+                    onTriggered: {
+                        if (!mouseArea.dragging) {
+                            mouseArea.tooltipping = true
+                        }
+                    }
+                }
+                onReleased: {
+                    if (mouseArea.dragging) {
+                        powerBalanceLogs.fetchLogs()
+                        mouseArea.dragging = false;
+                    }
+
+                    mouseArea.tooltipping = false;
+                }
+
+                onPressed: {
+                    startMouseX = mouseX
+                    startDatetime = d.now
+                }
+
+                onDoubleClicked: {
+                    if (selectionTabs.currentIndex == 0) {
+                        return;
+                    }
+
+                    var idx = Math.ceil(mouseArea.mouseX * d.visibleValues / mouseArea.width)
+                    var timestamp = new Date(d.startTime.getTime() + (idx * d.sampleRate * 60000))
+                    selectionTabs.currentIndex--
+                    d.now = new Date(timestamp.getTime() + (d.visibleValues / 2) * d.sampleRate * 60000)
+                    powerBalanceLogs.fetchLogs()
+                }
+
+                onMouseXChanged: {
+                    if (!pressed || mouseArea.tooltipping) {
+                        return;
+                    }
+                    if (Math.abs(startMouseX - mouseX) < 10) {
+                        return;
+                    }
+                    dragging = true
+
+                    var dragDelta = startMouseX - mouseX
+                    var totalTime = d.endTime.getTime() - d.startTime.getTime()
+                    // dragDelta : timeDelta = width : totalTime
+                    var timeDelta = dragDelta * totalTime / mouseArea.width
+                    print("dragging", dragDelta, totalTime, mouseArea.width)
+                    d.now = new Date(Math.min(new Date(), new Date(startDatetime.getTime() + timeDelta)))
+                }
+
+                onWheel: {
+                    startDatetime = d.now
+                    var totalTime = d.endTime.getTime() - d.startTime.getTime()
+                    // pixelDelta : timeDelta = width : totalTime
+                    var timeDelta = wheel.pixelDelta.x * totalTime / mouseArea.width
+                    print("wheeling", wheel.pixelDelta.x, totalTime, mouseArea.width)
+                    d.now = new Date(Math.min(new Date(), new Date(startDatetime.getTime() - timeDelta)))
+                    wheelStopTimer.restart()
+                }
+                Timer {
+                    id: wheelStopTimer
+                    interval: 300
+                    repeat: false
+                    onTriggered: powerBalanceLogs.fetchLogs()
+                }
+
+                Rectangle {
+                    height: parent.height
+                    width: 1
+                    color: Style.foregroundColor
+                    x: Math.min(mouseArea.width, Math.max(0, mouseArea.mouseX))
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+                }
+
+                NymeaToolTip {
+                    id: toolTip
+                    visible: (mouseArea.containsMouse || mouseArea.tooltipping) && !mouseArea.dragging
+
+                    backgroundItem: chartView
+                    backgroundRect: Qt.rect(mouseArea.x + toolTip.x, mouseArea.y + toolTip.y, toolTip.width, toolTip.height)
+
+                    property int idx: Math.ceil(mouseArea.mouseX * d.visibleValues / mouseArea.width)
+                    property var timestamp: new Date(d.startTime.getTime() + (idx * d.sampleRate * 60000))
+                    property PowerBalanceLogEntry entry: powerBalanceLogs.find(timestamp)
+
+                    property int xOnRight: Math.max(0, mouseArea.mouseX) + Style.smallMargins
+                    property int xOnLeft: Math.min(mouseArea.mouseX, mouseArea.width) - Style.smallMargins - width
+                    x: xOnRight + width < mouseArea.width ? xOnRight : xOnLeft
+                    property double maxValue: toolTip.entry ? Math.max(0, -entry.production) : 0
+                    y: Math.min(Math.max(mouseArea.height - (maxValue * mouseArea.height / valueAxis.max) - height - Style.margins, 0), mouseArea.height - height)
+
+                    width: tooltipLayout.implicitWidth + Style.smallMargins * 2
+                    height: tooltipLayout.implicitHeight + Style.smallMargins * 2
+
+                    ColumnLayout {
+                        id: tooltipLayout
+                        anchors {
+                            left: parent.left
+                            top: parent.top
+                            margins: Style.smallMargins
+                        }
+                        Label {
+                            text: toolTip.timestamp.toLocaleString(Qt.locale(), Locale.ShortFormat)
+                            font: Style.smallFont
+                        }
+
+                        Label {
+                            property double value: toolTip.entry ? Math.max(0, -toolTip.entry.production) : 0
+                            property bool translate: value >= 1000
+                            property double translatedValue: value / (translate ? 1000 : 1)
+                            text: qsTr("Total production: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                            font: Style.extraSmallFont
+                        }
+
+                        RowLayout {
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.red
+                            }
+
+                            Label {
+                                // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
+                                Component.onCompleted: lowerSeries = selfConsumptionSeries.lowerSeries
+                                property XYSeries lowerSeries: null
+
+                                property double value: toolTip.entry ? Math.max(0, toolTip.entry.consumption) : 0
+                                property bool translate: value >= 1000
+                                property double translatedValue: value / (translate ? 1000 : 1)
+                                text: qsTr("Consumed: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                                font: Style.extraSmallFont
+                            }
+                        }
+                        RowLayout {
+                            visible: root.batteries.count > 0
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.orange
+                            }
+
+                            Label {
+                                // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
+                                Component.onCompleted: lowerSeries = storageSeries.lowerSeries
+                                property XYSeries lowerSeries: null
+
+                                property double value: toolTip.entry ? Math.max(0, toolTip.entry.storage) : 0
+                                property bool translate: value >= 1000
+                                property double translatedValue: value / (translate ? 1000 : 1)
+                                text: qsTr("To battery: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                                font: Style.extraSmallFont
+                            }
+                        }
+                        RowLayout {
+                            Rectangle {
+                                width: Style.extraSmallFont.pixelSize
+                                height: width
+                                color: Style.green
+                            }
+
+                            Label {
+                                // Workaround for Qt bug that lowerSeries is non-notifyable and throws warnings
+                                Component.onCompleted: lowerSeries = acquisitionSeries.lowerSeries
+                                property XYSeries lowerSeries: null
+
+                                property double value: toolTip.entry ? Math.max(0, -toolTip.entry.acquisition) : 0
+                                property bool translate: value >= 1000
+                                property double translatedValue: value / (translate ? 1000 : 1)
+                                text: qsTr("To grid: %1 %2").arg(translatedValue.toFixed(2)).arg(translate ? "kW" : "W")
+                                font: Style.extraSmallFont
+                            }
+                        }
+                    }
+                }
+            }
+
         }
     }
+
+
 }
 
 

nymea-app/ui/mainviews/energy/StatsBase.qml

@@ -5,10 +5,10 @@ Item {
     id: root
 
     property int minutesCount: 9
-    property int hoursCount: 11
-    property int daysCount: 6
-    property int weeksCount: 12
-    property int monthsCount: 11
+    property int hoursCount: 10
+    property int daysCount: 7
+    property int weeksCount: 10
+    property int monthsCount: 6
     property int yearsCount: 5
 
     property var configs: ({
@@ -17,58 +17,61 @@ Item {
                                    startTime: minutesStart,
                                    sampleRate: EnergyLogs.SampleRate1Min,
                                    toLabel: minuteLabel,
-                                   toLongLabel: minuteLongLabel
+                                   toLongLabel: minuteLongLabel,
+                                   toRangeLabel: minuteRangeLabel
                                },
                                hours: {
                                    count: hoursCount,
                                    startTime: hoursStart,
                                    sampleRate: EnergyLogs.SampleRate1Hour,
                                    toLabel: hourLabel,
-                                   toLongLabel: hourLongLabel
+                                   toLongLabel: hourLongLabel,
+                                   toRangeLabel: hourRangeLabel
                                },
                                days: {
                                    count: daysCount,
                                    startTime: daysStart,
                                    sampleRate: EnergyLogs.SampleRate1Day,
                                    toLabel: dayLabel,
-                                   toLongLabel: dayLongLabel
+                                   toLongLabel: dayLongLabel,
+                                   toRangeLabel: dayRangeLabel
                                },
                                weeks: {
                                    count: weeksCount,
                                    startTime: weeksStart,
                                    sampleRate: EnergyLogs.SampleRate1Week,
                                    toLabel: weekLabel,
-                                   toLongLabel: weekLongLabel
+                                   toLongLabel: weekLongLabel,
+                                   toRangeLabel: weekRangeLabel
                                },
                                months: {
                                    count: monthsCount,
                                    startTime: monthsStart,
                                    sampleRate: EnergyLogs.SampleRate1Month,
                                    toLabel: monthLabel,
-                                   toLongLabel: monthLongLabel
+                                   toLongLabel: monthLongLabel,
+                                   toRangeLabel: monthRangeLabel
                                },
                                years: {
                                    count: yearsCount,
                                    startTime: yearStart,
                                    sampleRate: EnergyLogs.SampleRate1Year,
                                    toLabel: yearLabel,
-                                   toLongLabel: yearLabel
+                                   toLongLabel: yearLongLabel,
+                                   toRangeLabel: yearRangeLabel
                                }
                             })
 
-    function calculateSampleStart(sampleEnd, sampleRate, sampleCount) {
-        if (sampleCount === undefined) {
-            sampleCount = 1
-        }
-        var sampleStart = new Date(sampleEnd)
+    function calculateTimestamp(baseTime, sampleRate, offset) {
+        var timestamp = new Date(baseTime);
         if (sampleRate === EnergyLogs.SampleRate1Month) {
-            sampleStart.setMonth(sampleEnd.getMonth() - sampleCount)
+            timestamp.setMonth(baseTime.getMonth() + offset)
         } else if (sampleRate === EnergyLogs.SampleRate1Year) {
-            sampleStart.setFullYear(sampleEnd.getFullYear() - sampleCount)
+            timestamp.setFullYear(baseTime.getFullYear() + offset)
         } else {
-            sampleStart.setTime(sampleEnd.getTime() - (sampleRate * 60000 * sampleCount))
+            timestamp.setTime(baseTime.getTime() + (sampleRate * 60000 * offset))
         }
-        return sampleStart
+        return timestamp;
     }
 
     function minutesStart() {
@@ -82,6 +85,9 @@ Item {
     function minuteLongLabel(date) {
         return date.toLocaleString(Qt.locale(), Locale.ShortFormat)
     }
+    function minuteRangeLabel(date) {
+        return date.toLocaleString(Qt.locale(), Locale.ShortFormat) + " - " + new Date(date.getTime() + root.minutesCount * 60000).toLocaleString(Qt.locale(), Locale.ShortFormat)
+    }
 
 
     function hoursStart() {
@@ -95,6 +101,9 @@ Item {
     function hourLongLabel(date) {
         return date.toLocaleString(Qt.locale(), Locale.ShortFormat)
     }
+    function hourRangeLabel(date) {
+        return date.toLocaleString(Qt.locale(), Locale.ShortFormat) + " - " +  new Date(date.getTime() + root.hoursCount * 60 * 60000).toLocaleString(Qt.locale(), Locale.ShortFormat)
+    }
 
     function daysStart() {
         var d = new Date();
@@ -108,11 +117,14 @@ Item {
     function dayLongLabel(date) {
         return date.toLocaleDateString(Qt.locale(), Locale.ShortFormat)
     }
+    function dayRangeLabel(date) {
+        return date.toLocaleDateString(Qt.locale(), Locale.ShortFormat) + " - " + new Date(date.getTime() + root.daysCount * 24 * 60 * 60000).toLocaleDateString(Qt.locale(), Locale.ShortFormat)
+    }
 
     function weeksStart() {
         var d = new Date();
         d.setHours(0, 0, 0, 0);
-        d.setDate(d.getDate() - d.getDay() - weeksCount * 7);
+        d.setDate(d.getDate() - d.getDay() + 1 - (weeksCount - 1) * 7);
         return d
     }
     function weekLabel(date) {
@@ -127,6 +139,11 @@ Item {
         endDate.setDate(endDate.getDate() + 6)
         return date.toLocaleDateString(Qt.locale(), Locale.ShortFormat) + " - " + endDate.toLocaleDateString(Qt.locale(), Locale.ShortFormat)
     }
+    function weekRangeLabel(date) {
+        var endDate = new Date(date)
+        endDate.setDate(endDate.getDate() + (7 * root.weeksCount))
+        return date.toLocaleDateString(Qt.locale(), Locale.ShortFormat) + " - " + endDate.toLocaleDateString(Qt.locale(), Locale.ShortFormat)
+    }
 
 
     function monthsStart() {
@@ -141,6 +158,11 @@ Item {
     function monthLongLabel(date) {
         return date.toLocaleString(Qt.locale(), "MMMM yyyy")
     }
+    function monthRangeLabel(date) {
+        var endDate = new Date(date);
+        endDate.setMonth(date.getMonth() + monthsCount - 1)
+        return date.toLocaleString(Qt.locale(), "MMMM yyyy") + " - " + endDate.toLocaleString(Qt.locale(), "MMMM yyyy")
+    }
 
     function yearStart() {
         var d = new Date();
@@ -151,5 +173,11 @@ Item {
     function yearLabel(date) {
         return date.toLocaleString(Qt.locale(), "yyyy")
     }
+    function yearLongLabel(date) {
+        return date.toLocaleString(Qt.locale(), "yyyy")
+    }
+    function yearRangeLabel(date) {
+        return ""
+    }
 
 }