[SOLVED] ScreenSaver - disable screensaver on Windows

maximus

Trying to disable screensaver on windows when a specific QDialog is open.

I tried a lot of way but can't get it to work on Windows, with Mac I found a way.

Even tried to send key event and mouse event to the QDialog, event works fine but don't stop the screensaver from coming

Method 1 (hacky):

void WorkoutDialog::postponeScreensaver() {

  QPoint toMove = this->mapFromGlobal(QCursor::pos());
  toMove.setX(toMove.x()+1);

  QTest::keyClick(this, Qt::Key_A); //doesnt postpone screensaver...
  QTest::mouseMove(this, toMove); //mouse move but screensaver still trigger
}

Method 2 (not working on all Windows platform):

SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE , NULL, SPIF_SENDWININICHANGE);

Other Method?

maximus

This Method seems to be working, require more testing:

#ifdef Q_OS_MAC
  macUtil.disableScreensaver();
#endif
#ifdef Q_OS_WIN32
  SetThreadExecutionState(ES_CONTINUOUS | ES_DISPLAY_REQUIRED);
  //SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE , NULL, SPIF_SENDWININICHANGE);
#endif

maximus

May be something worth to have by default in Qt to avoid #ifdef

OSX: MacUtils.mm

//http://stackoverflow.com/questions/5596319/how-to-programmatically-prevent-a-mac-from-going-to-sleep/5596946#5596946
void MacUtils::disableScreensaver() {

	 qDebug() << "disableScreenSaveronMAC!";

	CFStringRef reasonForActivity = CFSTR("Maximum Trainer Workout");

	IOReturn success = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep,
										kIOPMAssertionLevelOn, reasonForActivity, &assertionID);


	if (success == kIOReturnSuccess)
	{
		//success = IOPMAssertionRelease(assertionID);
		///return disable sucess? todo..
	}

	qDebug() << "disableScreenSaveronMAC end !";
}
void MacUtils::releaseScreensaverLock() {

	IOPMAssertionRelease(assertionID);
}

Windows
SetThreadExecutionState(ES_CONTINUOUS | ES_DISPLAY_REQUIRED);