[wxPython-users] Creating Custom wxPython Widget

[Christopher Barker]

Chris Mellon wrote:

> This might be an excellent place to experiment with weave (part of
> scipy, from the same source as numpy),

hmmm -- I've never thought to use weave to call wx methods -- how the 
heck would you get a pointer to the DC?

 > I've never used it, but it should be possible to loop over
> the internal C++ numarray representation, calling DrawLine() as
> needed, all in C code.

Well, there is already DrawXXXList, that does that. In this case, what 
I'm looking for a is a way to directly pass the pointer to the numpy 
data block to the constructor for a wxPointList (or to an overloaded 
Draw* method that takes a pointer to a C array.

> That gets Python totally out of the way and
> should make for a very large speedup.

Well, maybe. I did some work with DrawXXXList, and the speed-up is only 
significant for simple objects: Points, Lines. For more complex stuff , 
including, to my surprise, bitmaps, the drawing time overwhelms the 
Python-C++ data translation anyway.

-Chris


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