[SOLVED] QDialog in fullscreen - disable OS screensaver?

maximus

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

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

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

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

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

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

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

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

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

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

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

SGaist

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

wesblake

@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.