[lazarus] Black clBtnFace fix? was Patch for searchresultsdialog

Andrew Johnson acjgenius at earthlink.net
Sat Nov 22 16:53:21 EST 2003

this shouldn't be a problem. theoretically the bg will always have a
valid rgb value, but it will not always have a valid pixel.

gc's must have a color with a valid pixel, so we query just in case. I
have no idea why the gc would not be initialized or might be being
queried wrong, but it certainly sound a bit odd.

I am guessing sometimes in kde the colormap passed is not the right one
or some such wierdness so querying fails.... but I don't know for sure.
cause it works for me fine when I tried to go into kde so...


On Sat, 2003-11-22 at 16:37, Tony Maro wrote:
> Bob Wingard wrote:
> >  I am running Mandrake 9.2 and have not seen the problem yet and I have
> >tried several themes. I have not downloaded any additional themes so I
> >am just using the stock KDE themes installed with Mandrake. I spend most
> >of my time in Gnome rather than KDE. I will run KDE for a few days and
> >see if I can re-create the problem.
> >  
> >
> Remember I'm a GTK noob, but maybe this will help.  I pulled some GTK 
> theme info from within my app and did some testing.
> Inside GetSysGCValues (from GTKProc.inc,) the color is set to the 
> CORRECT value using:
>     Result.foreground := Style^.bg[GTK_STATE_NORMAL];
> However, it reaches the following code at the end of that routine and 
> zero's the value:
>   if (style <> nil) then
>     if  (style^.colormap <> nil) then
>       gdk_colormap_query_color(style^.colormap,result.foreground.pixel, 
> @result.foreground)
>     else
> gdk_colormap_query_color(gdk_colormap_get_system(),result.foreground.pixel, 
> @result.foreground);
> I looked up the gdk_colormap_query_color function and found this on 
> Gnome's site:
> "This function is rarely useful; it's used for example to implement the 
> eyedropper feature in GtkColorSelection 
> <http://developer.gnome.org/doc/API/2.0/gtk/GtkColorSelection.html>."
> So I have no idea what the goal is with it...
> If I add an exit after the Result.foreground line, everything works 
> great.  But, I dunno what else this might break...
> -Tony
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