[wxpython-users] Bus Error w/ GraphicsContext on OSX

[Robin Dunn]

Stephen Hansen wrote:
> Hi there; in my app, I have a chunk of code which is doing:
> 
>         dc = wx.MemoryDC()
>         gc = wx.GraphicsContext.Create(dc)
>  
> Then some basic stuff like:
> 
>         gc.SetBrush(wx.TRANSPARENT_BRUSH)
>         gc.SetPen(wx.TRANSPARENT_PEN)
>         gc.DrawRectangle(0, 0, self.IMAGE_WIDTH, 16)
> 
> Basically, what I'm doing is trying to create an essentially empty 
> temporary canvas to draw upon and such, which I then blit onto another 
> DC and store as a bitmap. It works on windows fine. On the mac, however, 
> the call to "wx.GraphicsContext.Create(dc)" immediately fails with a 
> "Bus error". No traceback, nor any message in the Console provides any 
> additional information-- so I'm not quite sure what to do about figuring 
> out what's wrong.

Did you forget to put a wx.Bitmap into the memory dc or are you just not 
showing that?

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