[ icewm-Bugs-2797175 ] taskbar does not respect primary screen with fglrx

Bugs item #2797175, was opened at 2009-05-27 06:52
Message generated for change (Tracker Item Submitted) made by wosc
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https://sourceforge.net/tracker/?func=detail&atid=100031&aid=2797175&group_id=31

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Category: icewm-1.3
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Wolfgang Schnerring (wosc)
Assigned to: Nobody/Anonymous (nobody)
Summary: taskbar does not respect primary screen with fglrx

Initial Comment:
icewm version: both 1.2.38pre1 and 1.3.4pre2
context: fglrx driver and xrandr.
Actual result: Taskbar stretches over both screens.
Expected result: taskbar should only be visible on the primary screen.

Reason: fglrx also reports disconnected screens, but YDesktop::updateXineramaInfo only stores the actually connected ones in xiInfo. However, their screen_number is set to whatever was reported by the driver. In my case: 0=LCD, 1=disconnected TV, 2=CRT.

YDesktop::getScreenGeometry restricts screen numbers you can ask for to how many entries there are in xiInfo, so in my case it is impossible to get the geometry of the CRT-screen (which I would like to use as primary), since it has the number 2, but there are only 2 entries in xiInfo (so allowed to ask are 0 and 1). Thus, the geometry of the whole desktop is returned when asking for the primary screen, so the taskbar stretches over both.

Proposed solution: do not restrict which screen numbers can be asked for (see attached patch against 1.3.4pre2). This change is both safe and backwards compatible. All it does is remove the short-circuiting. If you do ask for a screen that does not exist (say, screen number 25), it will simply loop through all screens it knows about before concluding it doesn't exist.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100031&aid=2797175&group_id=31

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