On Mon, 20 Feb 2006 14:33:17 -0500
"Tony Pelton" <[EMAIL PROTECTED]> wrote:
> thanks for the reply.
>
> On 2/20/06, Mattias Gaertner <[EMAIL PROTECTED]> wrote:
> >
> > I just tried under linux and it works:
>
> with these changes ? or without ?
>
> > Call in glpaint ctrl_opengl.Invalidate
>
> i did this first, and this seemed to fix my problem.
>
> can you explain what this does to me ?
Invalidate tells the widgetset to mark the control for painting. That means
it will send a paint message onto the message queue. It will automatically
collect al paint messages for each control and send only one paint per
contro.
> are there any performance issues with this ?
The LCL, the window manager and the widgetset create a lot of Invalidate
events, so this is a fast action.
> should i put this before my OpenGL draw calls ?
No. It should not be used during painting, as you would create an endless
loop.
> after i "swap" GL buffers ?
This is independent.
Normally you swap buffers at the end of opengl painting.
> > and paint in ctrl_opengl.OnPaint.
>
> i didn't do this, because the other thing seemed to work.
If you don't paint in OnPaint, your graphic will not be painted, when you
hide your window and show it.
> should i still do this ?
Yes. It is sufficient to only paint there.
> if so, i'm not sure i understand ...
>
> on the "OnPaint" event, i should call "paint" on the OpenGL context ?
?
Mattias
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