Wrong background color in systray using composite extensions

[Brian J. Tarricone]

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Jasper Huijsmans wrote:
> It's a focus/redraw issues with the XEMBED stuff in gtkplug/socket. You
> can also see it without composite on slow Xserver (I see it with a
> remote windows Xserver). In that case it becomes a black square.
> 
> I have absolutely no idea how to solve it, or even what is causing it.
> Adding _queue_draw () calls does not help. Restarting the panel, or
> switching on autohide and then switching it off again, usually fixes the
> issue.

I might be mistaken, but _queue_draw() may not do what you want,
especially in GTK 2.6.  Calling _invalidate_rect() (which may do the
same thing, actually, can't remember), or gdk_window_clear_area() might
do the trick.  Since it's in another process, it might be necessary to
do some icky faking of expose events (that is, via XSendEvent(), not
using GdkEvents).  Not sure; I'm just throwing around random crap here.

	-b

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