(wx-users) Re: problems with wxMSW 2.8.0

[Jacob (=Jouk) Jansen]

VZ wrote on 24-JAN-2007 17:56:25.18

>On Tue, 23 Jan 2007 11:46:46 +0100 (MET) "Jacob (=Jouk) Jansen" <joukj at hrem.nano.tudelft.nl> wrote:
>
>JJ> The windows XP version seems to be unable to display parts of the graphics.
>JJ> I just cut a small part from my program (I know in the excerpt not all
>JJ> variables are declared) (see below). The wxStaticBox sbox is displayed on
>JJ> all versions correctly. The bitmap drawn to the dc of "canvas" shows itself
>JJ> on VMS and Linux but not on the wxMSW version.
>
> Why do you draw it on wxClientDC and not on wxPaintDC in EVT_PAINT
>handler?
>
>JJ> What do I do wrong? Is there some "memory/stack-size" problem in the wxMSW
>JJ> implementation?
>
> I think the most likely problem is that wxMSW doesn't allow wxClientDC of
>a window to paint over its children.

In the application the bitmap (and also lines, text etc..) are generated by a
a procedure that is called from another language than c++ (i.e. C or F90)
By doing so the EVT_PAINT is not activated and the class of "canvas" is not
known. So you need at least a way to force the EVT_PAINT (how do I do this?).
 However, I prefer the code as it is (and works in wxGTK) so that I can
"draw directly" to the window, without manualy calling the event-handler.

What would be the reason for wxMSW not allowing wxClientDC of a window to
paint over its children? Is this a limitation of Windows?

                       Jouk
		       


Bush : All votes are equal but some votes are more equal than others.

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