[ remy moueza ]
>  I'm having troubles with type coercion / casting with
>  java.awt.Graphics objects:
>  I want to use the drawPolygon() method but at runtime
>  JPanel.getGraphics()
>  returns a sun.awt.windows.WGraphics and the Jython interpreter try to
>  cast it into a sun.java2d.SunGraphics2D. I never had such problems
>  with Java.

AFAIK Jython does not cast to anything, it just uses the most specific
type available. But maybe you can show an example :-)

>  class JDisplay ( JPanel, MouseListener, MouseMotionListener ):
>      ...
>  
>      def display_poly ( self, poly, screen ):
>  	...	
>  
>  
>  Here is the error message :
>  sun.awt.windows.WGraphics # -> print gc
>  Traceback (innermost last):
>    File "C:\lecteurD\monDev\3Dmoteur\python\JAffichage.py", line 0, in
>  main
>    File "C:\lecteurD\monDev\3Dmoteur\python\JAffichage.py", line 0, in
>  display
>    File "C:\lecteurD\monDev\3Dmoteur\python\JAffichage.py", line 0, in
>  display_facette
>  TypeError: drawPolygon(): 1st arg can't be coerced to
>  sun.java2d.SunGraphics2D

The Traceback is from method display_facette, while you provide the
code of method display_polygon. Please have a look at method
display_facette, and post it if you can't find the cause.

Best wishes !
Oti.

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