Theron Virgin wrote:
>> On 31 Jul 2007, at 18:16, Theron Virgin wrote:
>>
>>> In my application when I drag other windows on top of my fltk
>>> window I get ghosting and my GUI looks very bad.  I also see this
>>> in the examples that come with FLTK (however, it doesn't look as
>>> bad in some of the apps).  To restore the window I have to drag it
>>> off screen or resize it.  I have tried putting a redraw call into a
>>> thread that runs once every 50 milliseconds or so and it solves the
>>> problem but causes continual flicker when I move the mouse over the
>>> window.  If I keep the mouse still it looks great.  Is there a good
>>> way to resolve this issue?
>> What version of fltk? What toolchain? What host operating system?
>> Which window manager?
>>
>> Fltk should not do what you describe (it certainly does not for me)
>> so I would have to suspect that something is awry with your setup
>> that is somehow interacting with fltk's redrawing.
>>
>>
> 
> I am using fltk 1.1.7 on windows xp pro.  I have tried the compiled 
> application on three different computers all running xp pro.  Some do it 
> worse then others but it is evident on all of them even with the example 
> apps.  Has anyone else seen this?


This seems to be the known bug addressed in STR 1681:

http://www.fltk.org/str.php?L1681

The problem can be shown best on multi processor systems, but if you try 
hard, you can see it on single processor systems.

It has been fixed in svn r5836 on 2007-05-16. It's a small patch in 
src/Fl_win32.cxx.

Albrecht
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