[lazarus] GTK team: please specify!

[Marc Weustink]

At 22:29 4-11-2003, Mattias Gaertner wrote:
>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.

I've been testing all controls and I see this behaviour in Linux/Gtk also 
on some controls. When moving a component (TTimer) over a control:
TEdit, then bottom and right border keep trails of the grabbers
TMemo, when moving over a TMemo, the topleft grabbers and border of the 
component are left behind.
TListBox, you can draw whith the component :-) The complete image of the 
component is left behind.

Another thing I noticed is that you cant place anything in front of a 
TCalendar, also no components

Marc