getting Displaysize

[fi0r]

hi,

i want to set a QGL Widget to fullscreen. To do that im using

QApplication::desktop()->size()

It works fine with one display but when im using a second display i get the size of both displays. (It still works when i'm cloning my first display)

how do i get the size of the display my application is running on?

[saa7_go]

BTW, I never play with QtOpenGL before. Maybe, you can try the following codes:

QGLWidget glWidget;
QSize displaySize = QApplication::desktop()->screenGeometry(&glWidget).size();

QGLWidget glWidget;
QSize displaySize = QApplication::desktop()->screenGeometry(&glWidget).size();

To copy to clipboard, switch view to plain text mode 

[rdockterjr]

Heres some code I have for this purpose;

int resolution1x,resolution1y,resolution2x,resolution2y,resolution3x,resolution3y,NumberOfMonitors;
int totalx, totaly;
 
QRect screenres1,screenres2,screenres3;
QPoint bottomright1, bottomright2,bottomright3;
 
NumberOfMonitors = QApplication::desktop()->screenCount();
std::cout << "The Number of monitors is " << NumberOfMonitors << " \n";
if(NumberOfMonitors == 1){
	screenres1 = QApplication::desktop()->screenGeometry(1);
	bottomright1 = screenres1.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	totalx = resolution1x;
	totaly = resolution1y;
}
else if (NumberOfMonitors == 2){
	screenres1 = QApplication::desktop()->screenGeometry(1);
	screenres2 = QApplication::desktop()->screenGeometry(2);
	bottomright1 = screenres1.bottomRight();
	bottomright2 = screenres2.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	resolution2x = bottomright2.x();
	resolution2y = bottomright2.y();
	totalx = resolution1x + resolution2x;
	totaly = resolution1y + resolution2y;
}
else if (NumberOfMonitors == 2){
	screenres1 = QApplication::desktop()->screenGeometry(1);
	screenres2 = QApplication::desktop()->screenGeometry(2);
	screenres3 = QApplication::desktop()->screenGeometry(3);
	bottomright1 = screenres1.bottomRight();
	bottomright2 = screenres2.bottomRight();
	bottomright3 = screenres3.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	resolution2x = bottomright2.x();
	resolution2y = bottomright2.y();
	resolution3x = bottomright3.x();
	resolution3y = bottomright3.y();
	totalx = resolution1x + resolution2x + resolution3x;
	totaly = resolution1y + resolution2y + resolution3y;
}
else{
	screenres1 = QApplication::desktop()->screenGeometry(1);
	bottomright1 = screenres1.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	totalx = resolution1x;
	totaly = resolution1y;
}
std::cout << "The total x pixels are " << totalx << " \n";
std::cout << "The total y pixels are " << totaly << " \n";
std::cout << "And screen 1 has  " << resolution1x << " x pixels \n";
std::cout << "And screen 1 has  " << resolution1y << " y pixels \n";

int resolution1x,resolution1y,resolution2x,resolution2y,resolution3x,resolution3y,NumberOfMonitors;
int totalx, totaly;

QRect screenres1,screenres2,screenres3;
QPoint bottomright1, bottomright2,bottomright3;

NumberOfMonitors = QApplication::desktop()->screenCount();
std::cout << "The Number of monitors is " << NumberOfMonitors << " \n";
if(NumberOfMonitors == 1){
	screenres1 = QApplication::desktop()->screenGeometry(1);
	bottomright1 = screenres1.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	totalx = resolution1x;
	totaly = resolution1y;
}
else if (NumberOfMonitors == 2){
	screenres1 = QApplication::desktop()->screenGeometry(1);
	screenres2 = QApplication::desktop()->screenGeometry(2);
	bottomright1 = screenres1.bottomRight();
	bottomright2 = screenres2.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	resolution2x = bottomright2.x();
	resolution2y = bottomright2.y();
	totalx = resolution1x + resolution2x;
	totaly = resolution1y + resolution2y;
}
else if (NumberOfMonitors == 2){
	screenres1 = QApplication::desktop()->screenGeometry(1);
	screenres2 = QApplication::desktop()->screenGeometry(2);
	screenres3 = QApplication::desktop()->screenGeometry(3);
	bottomright1 = screenres1.bottomRight();
	bottomright2 = screenres2.bottomRight();
	bottomright3 = screenres3.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	resolution2x = bottomright2.x();
	resolution2y = bottomright2.y();
	resolution3x = bottomright3.x();
	resolution3y = bottomright3.y();
	totalx = resolution1x + resolution2x + resolution3x;
	totaly = resolution1y + resolution2y + resolution3y;
}
else{
	screenres1 = QApplication::desktop()->screenGeometry(1);
	bottomright1 = screenres1.bottomRight();
	resolution1x = bottomright1.x();
	resolution1y = bottomright1.y();
	totalx = resolution1x;
	totaly = resolution1y;
}
std::cout << "The total x pixels are " << totalx << " \n";
std::cout << "The total y pixels are " << totaly << " \n";
std::cout << "And screen 1 has  " << resolution1x << " x pixels \n";
std::cout << "And screen 1 has  " << resolution1y << " y pixels \n";

To copy to clipboard, switch view to plain text mode 

In case this is still useful to anybody