127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
#include "raspberrypihelper.h"
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#include <QDebug>
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#include <QApplication>
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#include <QWindow>
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#include <QSettings>
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RaspberryPiHelper::RaspberryPiHelper(QObject *parent) : QObject(parent)
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{
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m_powerFile.setFileName("/sys/class/backlight/rpi_backlight/bl_power");
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bool available = m_powerFile.open(QFile::ReadWrite | QFile::Text);
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if (!available) {
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return;
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}
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qDebug() << "Raspberry Pi detected. Enabling backlight control";
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m_brightnessFile.setFileName("/sys/class/backlight/rpi_backlight/brightness");
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if (!m_brightnessFile.open(QFile::ReadWrite | QFile::Text)) {
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qWarning() << "Failed to open brightness file";
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}
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QByteArray currentBrightness = m_brightnessFile.readLine();
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m_currentBrightness = currentBrightness.trimmed().toInt() * 100 / 255;
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qDebug() << "Current brightness is:" << currentBrightness << m_currentBrightness;
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screenOn();
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foreach (QWindow *w, qApp->topLevelWindows()) {
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w->installEventFilter(this);
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}
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QSettings settings;
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m_screenOffTimer.setInterval(settings.value("screenOffTimeout", 15000).toInt());
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m_screenOffTimer.setSingleShot(true);
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connect(&m_screenOffTimer, &QTimer::timeout, this, &RaspberryPiHelper::screenOff);
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if (m_screenOffTimer.interval() > 0) {
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m_screenOffTimer.start();
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}
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}
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bool RaspberryPiHelper::active() const
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{
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return m_powerFile.isOpen();
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}
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int RaspberryPiHelper::screenTimeout() const
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{
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return m_screenOffTimer.interval();
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}
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void RaspberryPiHelper::setScreenTimeout(int timeout)
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{
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m_screenOffTimer.setInterval(timeout);
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QSettings settings;
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settings.setValue("screenOffTimeout", timeout);
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if (timeout > 0) {
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m_screenOffTimer.start();
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} else {
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m_screenOffTimer.stop();
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}
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}
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int RaspberryPiHelper::screenBrightness() const
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{
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return m_currentBrightness;
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}
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void RaspberryPiHelper::setScreenBrightness(int percent)
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{
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m_currentBrightness = percent;
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m_brightnessFile.write(QString("%1\n").arg(percent * 255 / 100).toUtf8());
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m_brightnessFile.flush();
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}
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bool RaspberryPiHelper::eventFilter(QObject *watched, QEvent *event)
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{
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if (m_screenOffTimer.interval() == 0) {
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return QObject::eventFilter(watched, event);
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}
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QList<QEvent::Type> watchedTypes = {
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QEvent::ActivationChange,
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QEvent::ApplicationStateChange,
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QEvent::KeyPress,
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QEvent::KeyRelease,
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QEvent::MouseButtonPress,
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QEvent::MouseButtonRelease,
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QEvent::MouseMove,
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QEvent::Show,
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QEvent::TouchBegin,
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QEvent::TouchEnd,
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QEvent::TouchUpdate,
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};
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if (!watchedTypes.contains(event->type())) {
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return QObject::eventFilter(watched, event);
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}
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if (!m_screenOffTimer.isActive()) {
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screenOn();
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m_screenOffTimer.start();
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return true;
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}
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m_screenOffTimer.start( );
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return QObject::eventFilter(watched, event);
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}
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void RaspberryPiHelper::screenOn()
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{
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qDebug() << "Turning screen on";
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int ret = m_powerFile.write("0\n");
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m_powerFile.flush();
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if (ret < 0) {
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qWarning() << "Failed to power on screen";
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}
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}
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void RaspberryPiHelper::screenOff()
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{
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qDebug() << "Turning screen off";
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int ret = m_powerFile.write("1\n");
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m_powerFile.flush();
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if (ret < 0) {
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qWarning() << "Failed to power off screen";
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}
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}
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