[wxPython-users] Drawing a window to a pixmap

[Robin Dunn]

Christof wrote:
> Hi,
> 
> I need to draw the contents of a window to a pixmap. There does not seem to be a
> Window.Draw() method, since the drawing is initiated by an event. 
> 
> Is there a way to achieve this?

It depends on what you mean.  If you want to do something like a screen 
shot can capture everything, including native child widgets, etc. then 
there is not an reliable way to do that.  You can use a wx.ScreenDC and 
blit from that to a wx.Memory but it will only copy the pixels visible 
on screen and if another window is overlapping the window in question 
then you'll get those pixels instead of your window.

If you just want to be able to draw the same thing to a bitmap that you 
are already drawing to the window, then you can do that simply by making 
a wx.MemoryDc with a wx.Bitmap selected into it, and then perform the 
same drawing code using that dc as you do when painting the window. 
(Factoring out the common code into a separate method so it can be 
called from both placed works well for this.)


-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!