I'm working on improving the plotting speed of one of our applications. As
part of that, I was looking at how quickly the QtAgg backend is drawing. I
added some print out's to the backend and noticed that it seems to be
drawing everything twice. In the code:
backend_qtagg.py: FigureCanvasQTAgg class:
def draw( self ):
"""
Draw the figure when xwindows is ready for the update
"""
if DEBUG: print "FigureCanvasQtAgg.draw", self
self.replot = True
FigureCanvasAgg.draw(self)
self.repaint( False )
FigureCanvasAgg.draw() will cause a draw the repaint call will cause a draw.
If I comment out the FCAgg.draw() call, my application (QtAgg embedded in a
PyQt program) works fine. I've also run several of the various example
scripts and they seem to work fine as well. Panning, zooming, redraws,
resize, and file saving seem to be unaffected.
Does anyone know why the extra draw call might be necessary?
Ted
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