I tested this on 0.91.2 on Ubuntu Gutsy, and wx 2.8.7.1, and found that when I bring up a new window, I see a black canvas and it doesn't draw any of the matplotlib objects until I do something like resizing that must explicitly call a draw at some point. This may be why it's in there... perhaps some sort of checking to see if any draw has been performed yet? On Mon, Mar 31, 2008 at 7:58 AM, Gregor Thalhammer <gre...@gm...> wrote: > Dear developers, > > I discovered that in backend_wx.py in _onPaint(), the callback function > for repainting a matplotlib figure, every time a repaint is done also > the bitmap is rerendered: > > backend_wx.py/_onPaint(): > ... > # Render to the bitmap > self.draw(repaint=False) > ... > > This also affects the behaviour of the wxagg backend. Rerendering and > therefore also repainting gets quite slow if, e.g., images are included > in the figure. I can see this by simply dragging another window across > the matplotlibfigure. Commenting out the rerendering I get a much > smoother behaviour. I could not observe problems except that sometimes > some parts of the figure are not properly repainted if the matplotlib > figure is in the background (I only tested the wxagg backend). Therefore > it seems that this rerendering every time a repaint is performed is not > really necessary and should be avoided. > > I tested this on matplotlib 0.91.2 on WinXP, Python 2.5, wx 2.8.7. I > checked that in the current svn version the _onPaint() function is > unchanged. > > Gregor > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > _______________________________________________ > Matplotlib-devel mailing list > Mat...@li... > https://lists.sourceforge.net/lists/listinfo/matplotlib-devel > -- Erik Tollerud Graduate Student Center For Cosmology Department of Physics and Astronomy 4155B Frederick Reines Hall University of California, Irvine Office Phone: (949)824-2996 Cell: (651)307-9409 eto...@uc...