On 08/29/11 19:19, Steve Underwood wrote:
> I've been using FLTK for years on Linux and Windows machines. For the first
> time I have tried using it with XFCE 4.8, and I find a problem that doesn't
> seem to occur anywhere else. I am using FLTK 1.10.
>
> If I run Fluid, and create a window with some coloured background areas,
> those background are not updated properly. The window is initially drawn OK.
> However, if another window then overlaps it and is moved away, the background
> areas in the window I am creating are not properly restored. If I finish my
> Fluid development work, and build the resulting application, the application
> behaves in the same way. If I restart the same machine running Gnome 3
> instead of XFCE, both Fluid and the application behave properly. The same
> code also behaves OK on a Windows XP machine.
>
> Is this a known issue? Is there a workaround?
I just tried yum installing xfce, whipped up an .xinitrc to start
xfwm4 and xfdesktop, and fluid from both 1.1.10 and 1.3.0 seem
to work fine; I made colored areas and can resize the windows OK.
This on 64bit Centos 5.5 on a mac mini.
Usually problems with background drawing are graphics driver related.
Are these Fl_Double_Window's or just plane Fl_Window's in your app?
Are there certain FLTK test programs that exhibit this behavior,
and not others?
What kind of update problem is it; does it leave echos of the window's
own borders behind as you make windows larger, or does it 'see through'
to windows below? Or perhaps leaves partially drawn flashes of the
current
window behind?
Is there anything unusual or new about your graphics driver or
equipment?
Is it well supported? Or maybe testing new settings in the x config
file?
Perhaps hardware acceleration related settings?
Can you paste a simple compilable fltk program the exhibits the problem
on your box? Does changing the window from an Fl_Window <->
Fl_Double_Window
make a difference? Are there scrollers in your app, and does the problem
only happen during scrolling or resizes.
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