[lazarus] GTK team: please specify!

[Mattias Gaertner]

On Tue, 04 Nov 2003 22:12:26 +0100
Micha Nelissen <M.Nelissen at student.tue.nl> wrote:

> Mattias Gaertner wrote:
> > On Tue, 04 Nov 2003 14:24:31 +0100
> > Micha Nelissen <M.Nelissen at student.tue.nl> wrote:
> > 
> > 
> >>I have implemented GetDesignerDC for win32. Screen relative positions. 
> >>Works reasonably well. I can see the grid alignment lines now :).
> > 
> > 
> > Grid alignment lines? :)
> > I guess, you mean the blue and green guide lines. 
> 
> Yes, those :).
> 
> >>But: 
> >>things drawn onto controls are left behind. I assume nothing is drawn 
> >>into controls DC's anymore, only to the designer DC?
> > 
> > 
> > Markers and grids are painted per control paint messages.
> > The invalidate rectangles are not big enough. Not a big thing. This is a
> > known issue. Although with the new technique it appears more often. 
> 
> A lot more :). For example: placing a TGroupBox into the form and then 
> placing a button in that groupbox, selecting it. Then move the button: a 
> trail of complete square boxes of markers is left behind. Not a 1-pixel 
> line, but the full 10 by 10 pixel box or so. All blue and green lines 
> are left behind on controls, so moving them around a little bit and they 
> all have blue and green borders :). Do you know the cause, solution?

Sounds as if the InvalidateRect does not work properly under win32. Or too
good.


Mattias