You are not logged in.

Multiple Monitor Woes: QDesktopWidget

Dear visitor, welcome to QtForum.org. If this is your first visit here, please read the Help. It explains in detail how this page works. To use all features of this page, you should consider registering. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.

prazak

Beginner

  • "prazak" started this thread

Posts: 27

Location: seattle, USA

  • Send private message

1

Monday, August 13th 2007, 9:35pm

Multiple Monitor Woes: QDesktopWidget

YO,

My app uses 2 QMainWindows so as to get two icons down in the windows taskmanager. A second instance of QMainWindow gets created on request after the first starts up. The thing is, users often move the 1st main window to a second monitor after startup, but then when the 2nd QMainWindow is instanced, it shows on the 1st primary monitor instead of the expected 2nd, which is annoying.

I see QDesktopWidget allows me to gleen what monitor a widget is on, but not how to make a widget live on the second monitor.

If I make the second QMainWindow a child of the first, it loses the desirable taskmanager appearance.

Thanks for any multi-monitor tips.

prazak

Beginner

  • "prazak" started this thread

Posts: 27

Location: seattle, USA

  • Send private message

2

Monday, August 13th 2007, 10:43pm

RE: Multiple Monitor Woes: QDesktopWidget

I think I figured it out. The key is to account for the screen geometry of other screens when you move your widget.

For example:

Source code

 
1
2
3
4
5
6
7
8
9
10
11
12

// what screen are we on?
const int screen = QApplication::desktop()->screenNumber(this);
const QRect availableRect(QApplication::desktop()->availableGeometry(screen));

// if we are not on the primary monitor, account for that
int extra = 0;
for (int ff = 0; ff < screen; ff++ )
   extra += QApplication::desktop()->screenGeometry(ff).width();
	
const int iXpos = availableRect.width()/2 - frameGeometry().width()/2;
const int iYpos = availableRect.height()/2 - frameGeometry().height()/2;
move(iXpos + extra, iYpos);