[SOLVED] QDialog in fullscreen - disable OS screensaver?

maximus · wrote on 17 Dec 2014, 00:59

[quote author="MarianMMX" date="1397293908"]Ok, tested on Windows XP:

DisableScreenSaver.c
@
#include <Windows.h>
#pragma comment(lib, "user32.lib")

int main()
{
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE , NULL, SPIF_SENDWININICHANGE);
return 0;
}

@
[/quote]

Tested and works on windows 7 too. thanks
Update: not really what I wanted, it still disable the ScreenSaver after you leave the app.. don't want to mess with personal settings..

I gave up trying to emulate a key press, will use this code instead.
Trying to find an equivalent for Mac OS X now

maximus · wrote on 17 Dec 2014, 00:59

[quote author="MarianMMX" date="1397293908"]Ok, tested on Windows XP:

DisableScreenSaver.c
@
#include <Windows.h>
#pragma comment(lib, "user32.lib")

int main()
{
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE , NULL, SPIF_SENDWININICHANGE);
return 0;
}

@
[/quote]

Tested and works on windows 7 too. thanks
Update: not really what I wanted, it still disable the ScreenSaver after you leave the app.. don't want to mess with personal settings..

I gave up trying to emulate a key press, will use this code instead.
Trying to find an equivalent for Mac OS X now

maximus · wrote on 17 Dec 2014, 01:38

I read you can call Objective-C from Qt

I want "to use this method":http://stackoverflow.com/questions/5596319/how-to-programmatically-prevent-a-mac-from-going-to-sleep/5596946#5596946

I made a header file named "MacUtil.h" and a "MacUtil.mm" that will call the Objective-C code. Will see if I can get it to work and post result

maximus · wrote on 17 Dec 2014, 01:38

I read you can call Objective-C from Qt

I want "to use this method":http://stackoverflow.com/questions/5596319/how-to-programmatically-prevent-a-mac-from-going-to-sleep/5596946#5596946

I made a header file named "MacUtil.h" and a "MacUtil.mm" that will call the Objective-C code. Will see if I can get it to work and post result

maximus · wrote on 17 Dec 2014, 01:52

On the way, will edit this post with solution
MacUtil.h

@class MacUtil
{

public:
MacUtil();
~MacUtil();

void disableScreensaver();
void releaseScreensaverLock();

private:
IOPMAssertionID assertionID;

};

#endif // MACUTIL_H@

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

CFStringRef* reasonForActivity= CFSTR("MaximumTrainer FullScreen Workout");
IOReturn success = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep,
                                    kIOPMAssertionLevelOn, reasonForActivity, &assertionID);
if (success == kIOReturnSuccess)
{
    //return sucess? todo..
}

}

void MacUtil::releaseScreensaverLock() {

IOPMAssertionRelease(assertionID);

}
@

maximus · wrote on 17 Dec 2014, 01:52

On the way, will edit this post with solution
MacUtil.h

@class MacUtil
{

public:
MacUtil();
~MacUtil();

void disableScreensaver();
void releaseScreensaverLock();

private:
IOPMAssertionID assertionID;

};

#endif // MACUTIL_H@

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

CFStringRef* reasonForActivity= CFSTR("MaximumTrainer FullScreen Workout");
IOReturn success = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep,
                                    kIOPMAssertionLevelOn, reasonForActivity, &assertionID);
if (success == kIOReturnSuccess)
{
    //return sucess? todo..
}

}

void MacUtil::releaseScreensaverLock() {

IOPMAssertionRelease(assertionID);

}
@

maximus · wrote on 17 Dec 2014, 02:53

Anyone good with Objective-C?

I'm getting theses error tryings to compile the new class (mm file) I just added:

duplicate symbol __ZN8MacUtilsC2Ev in:
MacUtils.o
macutils.o
duplicate symbol __ZN8MacUtilsC1Ev in:
MacUtils.o
macutils.o

Seems like a conflict with
@#import <IOKit/pwr_mgt/IOPMLib.h> in MacUtil.mm@
and my .pro has already theses:
@ LIBS += -framework IOKit
LIBS += -framework CoreFoundation@

maximus · wrote on 17 Dec 2014, 02:53

Anyone good with Objective-C?

I'm getting theses error tryings to compile the new class (mm file) I just added:

duplicate symbol __ZN8MacUtilsC2Ev in:
MacUtils.o
macutils.o
duplicate symbol __ZN8MacUtilsC1Ev in:
MacUtils.o
macutils.o

Seems like a conflict with
@#import <IOKit/pwr_mgt/IOPMLib.h> in MacUtil.mm@
and my .pro has already theses:
@ LIBS += -framework IOKit
LIBS += -framework CoreFoundation@

maximus · wrote on 17 Dec 2014, 03:02

Solved, I had 2 times the OBJECTIVE_SOURCES directive in my pro file pointing to the same .mm file.
Will have to go learn Objective-C now, sigh.. :)

maximus · wrote on 17 Dec 2014, 03:02

Solved, I had 2 times the OBJECTIVE_SOURCES directive in my pro file pointing to the same .mm file.
Will have to go learn Objective-C now, sigh.. :)

maximus · wrote on 17 Dec 2014, 04:12

Working for both Windows and OS X!

On dialog open (constructor):
@// Disable ScreenSaver
#ifdef Q_OS_MAC
macUtil.disableScreensaver();
#else
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE , NULL, SPIF_SENDWININICHANGE);
#endif@

On dialog close (destructor):
@#ifdef Q_OS_MAC
macUtil.releaseScreensaverLock();
#else
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, TRUE , NULL, SPIF_SENDWININICHANGE);
#endif@

Tested and work for Windows, if you have no screensaver, it will not put one with the the destructor, all possible cases seems to work

maximus · 2 Feb 2016, 20:37

Working for both Windows and OS X!

On dialog open (constructor):
@// Disable ScreenSaver
#ifdef Q_OS_MAC
macUtil.disableScreensaver();
#else
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE , NULL, SPIF_SENDWININICHANGE);
#endif@

On dialog close (destructor):
@#ifdef Q_OS_MAC
macUtil.releaseScreensaverLock();
#else
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, TRUE , NULL, SPIF_SENDWININICHANGE);
#endif@

Tested and work for Windows, if you have no screensaver, it will not put one with the the destructor, all possible cases seems to work

SGaist · wrote on 17 Dec 2014, 23:40

You should rather use a elif defined(Q_OS_WIN) since it's completely platform specific

SGaist · wrote on 17 Dec 2014, 23:40

You should rather use a elif defined(Q_OS_WIN) since it's completely platform specific

wesblake · wrote on 2 Feb 2016, 20:37

@maximus said:

Working for both Windows and OS X!

On dialog open (constructor):
@// Disable ScreenSaver
#ifdef Q_OS_MAC
macUtil.disableScreensaver();
#else
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE , NULL, SPIF_SENDWININICHANGE);
#endif@

On dialog close (destructor):
@#ifdef Q_OS_MAC
macUtil.releaseScreensaverLock();
#else
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, TRUE , NULL, SPIF_SENDWININICHANGE);
#endif@

Tested and work for Windows, if you have no screensaver, it will not put one with the the destructor, all possible cases seems to work

Can you share your source or at least the relevant part? I've been using the same code for my app to disable/re-enable on Windows, but now need to do the same for Mac clients. Thanks.