How to tell which screen a CGWindow is shown on when it is partially off-screen?

Asked Jun 05 '15 at 03:09

Active Feb 26 '20 at 00:41

Viewed 822 times

I get a list of CGWindows using CGWindowListCreate as shown below:

CFArrayRef windows = CGWindowListCreate(kCGWindowListOptionOnScreenOnly, 0);

Is there a way to tell which NSScreen each window is on? I've trying looking at the intersection of window bounds and the frames of the screens, but if a window is partially off screen it can intersect with the frame of another screen.

Is there a more reliable way to do this?

edited Feb 26 '20 at 00:41

asked Jun 05 '15 at 03:09

DanielGibbs

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Just a thought,Can't you check the window frame? – Raviprakash Jun 05 '15 at 04:51
What would I check it for? – DanielGibbs Jun 05 '15 at 04:52
I think that window bounds can obtained by this method:[http://stackoverflow.com/questions/6593710/get-a-bounds-of-windowref](http://stackoverflow.com/questions/6593710/get-a-bounds-of-windowref). After this get the screen bounds using CGDisplayBounds. Check window frames are within display rect or not. – Raviprakash Jun 05 '15 at 05:09
I can get the bounds, but as I said in the question, when a window is partially offscreen its bounds will be within the frame of multiple screens. – DanielGibbs Jun 05 '15 at 05:43
When window is partially offscreen what is the bounding rect you get and what is the display rect. – Raviprakash Jun 05 '15 at 07:05
I can only get the bounds (as described in your link), and they are the full window bounds in global co-ordinates. – DanielGibbs Jun 05 '15 at 07:08
Did you found any solution ? I'm currently having the same problem, – CryingHippo Apr 20 '16 at 20:46
No, sorry. Still no way to do this as far as I know. – DanielGibbs Apr 20 '16 at 22:10

How to tell which screen a CGWindow is shown on when it is partially off-screen?

0 Answers0