libxfcegui4's xinerama wrapper

Brian J. Tarricone bjt23 at
Thu May 13 16:11:40 CEST 2004

random semi-related question:  a xinerama screen has only a single 
(real) root window, correct?  i think i may end up having to create a 
single fullscreen window for xinerama anyway... blah.


On Thu, 13 May 2004, Jasper Huijsmans wrote:

> On Thu, May 13, 2004 at 03:19:53AM -0400, Brian J. Tarricone wrote:
> > Jasper Huijsmans wrote:
> > 
> > >I was wondering, how about using the GdkScreen API? It is available 
> > >since gtk 2.2, so we could use it for Xfce 4.2. Are there any problems 
> > >with that?
> > 
> > i started using some of it with xfdesktop, but frankly i find it 
> > somewhat confusing.  i just looked at it again, and i think ive figured 
> > it out.  here's how i understand it:
> > 
> [Good stuff skipped]
> Wow, you get rather verbose, just before you go to sleep ;-)
> It all seemed to be correct. Summary:
> GdkDisplayManager : apparently gtk can manage multiple displays (or
> connections to display?). Not useful for us.
> GdkDisplay : GDK representation of a X 'Display'. Mentally maps to
> 'computer + input devices + monitor(s)'. We only have to deal with the
> default display.
> GdkScreen : GDK representation of an 'XScreen'. This is where the action is
> for us ;)
> For (non-xinerama) multihead setups a display has multiple
> screens. Xfdesktop manages all screens with one instance. The panel and
> xfwm rely on the user to set the correct DISPLAY variable and then simply
> use the default screen.
> Xinerama is weird in that it makes multiple monitors part of one GdkScreen.
> Normal non-xinerama setups can of course be seen as xinerama with only one
> monitor ;) The GdkScreen API seems to provide all information we need
> to get information about the monitors, number of monitoris and geometry
> of each. I used it in my panel widget prototype and it did seem to work
> properly.
> 	Jasper
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