[Lazarus] gtk2 TCustomControl.Paint, InvalidateRect

[zeljko]

On Thursday 07 of July 2011 10:50:37 Armin Diehl wrote:
> I have tried the same under gtk1, works fine, ClipRect returns only the
> rect to be updated and not the rect of the full window. Looks like a bug
> in gtk2 since it works fine under windows and gtk1.
> 
> Any idea what i can do ?

How to get an idea with such informations ? What's wrong 
a) TGtk2WidgetSet.InvalidateRect
b) Canvas.ClipRect 
?

zeljko

> 
> On 07/01/2011 04:37 PM, Armin Diehl wrote:
> > I have a problem with InvalidateRect with gtk2 on linux,
> > Canvas.ClipRect always returns the full area and not the rect that
> > needs to be updated. Under windows, everything works fine.
> > My problem is that within a terminal emulation program i have to draw
> > a blinking cursor (250 ms) and blinking chars (500 ms). Under gtk2,
> > invalidating the area with the cursor (InvalidateRect(Handle, @rect,
> > FALSE)) does not work and my paint will always repaint the whole
> > terminal area and this causes a high cpu utilization. Under windows it
> > works fine and only the cursor or other invalid parts will be drawn
> > within paint.
> > Any idea what i can do under linux gtk2 ?
> > 
> > Thx
> > 
> > Armin
> 
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