Fast Draw

Stefano Mancini (
Fri, 06 Dec 1996 13:52:09 +0100

To subscribers of the xforms list from Stefano Mancini <> :

hi dear xformers,
I have made a CAD using xforms and canvas.....

I have a big number of graphics primitive, and i have found a
a problem with redraw all the object drawn into the canvas.

I see that when an expose event is sent to the canvas object the
graphs are re-draw one after another and this is not estetically
beatifull..... has someone suggestions for me to solve this problem,
namely does exist a method that performs as the following:
1.freeze the canvas,
2.redraw all
3.unfreeze it
using xforms library ?


Dott. Stefano Mancini
Institution: University of PISA - Department of Physics
Business Address: Via Vecchia Livernese - 56010 S.Piero a Grado (Pisa)
Business Phone: +39 50 880.344
Business Fax: +39 50 880.350
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