[lazarus] Win32 bug: tcontrol's painting themselves intgroupboxes

[Mattias Gaertner]

On Sun, 31 Aug 2003 18:54:50 +0200
Mattias Gaertner <nc-gaertnma at netcologne.de> wrote:

> On Sun, 31 Aug 2003 16:58:18 +0200
> Micha Nelissen <M.Nelissen at student.tue.nl> wrote:
> 
> > Hi,
> > 
> > The problem is the following: if a tcontrol paints itself to it's parent
> > 
> > DC, and the parent's clientrect is different than the origin, the 
> > tcontrol's will paint themselves to the wrong position, namely the 
> > parent.topleft, not the topleft of the clientrect. This happens with 
> > TColorButton's in TGroupboxes for example. How do we solve this?
> > 
> > FYI: Delphi has not solved this, a control at position (0,0) in a 
> > tgroupbox is painted on top of the caption, while we want it in the 
> > clientrect.
> 
> Right.
> An additional problem is, that the gtk paints before and the win32 paint
> during message handling and they both uses different DC origins. There are
> plenty of possibilities, where the origin can be moved to fix this. I will
> also look into this ...

Maybe I find a solution.


Mattias