A Couple of questions on OGL Lineshapes

[Javier Cámara Moreno]

Hi everybody,

I am developing a little graph editor using python 2.5 and wx 2.8. 
Whenever I try to add text to a line shape I get a big rectangle on the 
background which covers the shapes. Is there a way to render the text on 
a transparent background? I googled and found the same question in 
several places, but no answers :)

The second thing is: If I am drawing a lineshape as an spline, control 
points are fixed. Is there a way to update the position of this control 
points when I move the shapes which are connected to the line?

Thanks!