71 lines
1.3 KiB
C++
71 lines
1.3 KiB
C++
#include "EnergySaver.h"
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#include <QDebug>
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#include <QProcess>
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#include <iostream>
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EnergySaver::EnergySaver(QObject *parent) : QObject(parent)
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{
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}
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/**
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* @brief Create instance if necessary and set timeout interval.
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* @param interval Timer interval in seconds
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* @see EnergySaver::instance
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*/
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void EnergySaver::init(int interval)
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{
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EnergySaver* saver = instance();
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saver->initTimer(interval*1000);
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saver->restartTimer();
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}
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/**
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* @brief Implements the singleton pattern.
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* @return Instance
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*
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* If no instance has been created yet, create new instance.
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*/
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EnergySaver *EnergySaver::instance()
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{
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static EnergySaver* inst;
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if (inst == nullptr)
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{
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inst = new EnergySaver();
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}
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return inst;
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}
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void EnergySaver::restartTimer()
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{
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if(mTimer.isActive()){
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mTimer.stop();
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}
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mTimer.start();
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}
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/**
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* @brief Initialize and connect timer.
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* @param interval Timeout interval in millisecond.
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*/
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void EnergySaver::initTimer(int interval)
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{
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connect(&mTimer, &QTimer::timeout, this, &EnergySaver::onTimeout);
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mTimer.setInterval(interval);
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mTimer.setSingleShot(true);
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}
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/**
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* @brief Behavior on timeout: shut down RaspberryPi.
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*/
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void EnergySaver::onTimeout()
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{
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std::cout << "Shutting down.";
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#ifndef _DEBUG
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QProcess p;
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p.start("/usr/local/sbin/do_shutdown.sh");
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p.waitForFinished();
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#endif
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}
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