[cairo] PyGtk Drag and Drop in a gtk.DrawingArea

[Donn]

On Saturday, 11 July 2009 05:05:21 Antoni Boucher wrote:
> I want to use drag and drop in a gtk.DrawingArea, but when I use it, it is
> very slow
Python is pretty slow. GTK on top of Python is slow. Cairo on top of Python is 
slowish. Doing an intense loop that must draw stuff so quickly that the mouse 
is the measure is going to fail.

You can do things to maximise the speed. Before your main drawing loop (where 
you use cairo on the context):
1. Pre-calculate as many things as you can.
2. Have the least number of if commands possible.

Also I see you using surfaces in your code. I have noticed that those (via 
Python-Cairo) are actually *very* slow. It's faster to draw things in pure 
vectors, even if that means more python-cairo commands!

hth
\d
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