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Juste a simple question about the DC in wxpython ...

I've made a wxWindow class, where i need to paint myself the content.
so i've added an evt_paint() to draw in the wxPaintDC ...
It works like a charm !! superb

To trigg the painter event, in some codes, i use the Refresh() method
It works greatly !

But the trouble is :

i found it flash a lot my wxwindow, when i trigg the painter ...
(i see speed "drawing horizontal line" .. which make the screen seems to
flash (i don't know how to describe that, but that flash my screen ))

Here are my questions :

- is there a way to wait for an "vertical top" to draw the content (to
synchronize with the screen redraw) ?
- is there a way to implement a double-buffering system, to let the redraw
be smoother ?

in an another way : how to skip theses flash redraw ?

marco wrote:
> Juste a simple question about the DC in wxpython ...
>
> I've made a wxWindow class, where i need to paint myself the content.
> so i've added an evt_paint() to draw in the wxPaintDC ...
> It works like a charm !! superb
>
> To trigg the painter event, in some codes, i use the Refresh() method
> It works greatly !

Two points
1) you would do well to subscribe to the wxPython news group, they
specifically handle wxPython related issues and you will have a better
shot at getting the right answer.

http://wxpython.org/maillist.php

2) In the demos supplied by wxPython, see the wxScrolledWindow example.
They show how to use a double buffering screen that will help prevent
the flashing screen when it is being redrawn. Just look for

if BUFFERED:

in the code. If you don't have access to this, I'll send it to you.

Brian

> > Juste a simple question about the DC in wxpython ...
> >
> > I've made a wxWindow class, where i need to paint myself the content.
> > so i've added an evt_paint() to draw in the wxPaintDC ...
> > It works like a charm !! superb
> >
> > To trigg the painter event, in some codes, i use the Refresh() method
> > It works greatly !
>
> Two points
> 1) you would do well to subscribe to the wxPython news group, they
> specifically handle wxPython related issues and you will have a better
> shot at getting the right answer.
>
> http://wxpython.org/maillist.php

sure ... and i've already subscribe to it

> 2) In the demos supplied by wxPython, see the wxScrolledWindow example.
> They show how to use a double buffering screen that will help prevent
> the flashing screen when it is being redrawn. Just look for
>
> if BUFFERED:
>
> in the code. If you don't have access to this, I'll send it to you.
>
> Brian

thanx a lot ...
i've got the demo, and got access to the code ...
(i use it a lot, but never see an example to disabled this flashed
rendering)

i will use it ...
thanx for your answer ...