On Friday 07 March 2008 4:58:03 pm Darren Dale wrote: > I am having some trouble with the Cursor widget with the qt4agg backend. > Here is a short script which works with the gtkagg backend with useblit > either true or false: > > ---------- > from matplotlib import rcParams > rcParams['backend']='gtkagg' > from pylab import * > from matplotlib.widgets import Cursor > > t = arange(0.0, 1.0, 0.01) > s = sin(2*2*pi*t) > ax = subplot(111) > > cursor = Cursor(ax, useblit=True) > > ax.plot(t, s, 'o') > axis([0,1,-1,1]) > show() > ------------ > > If I use the qt4agg backend, with useblit False, the cursor lines do not > render. If useblit is True, the lines render but the pixmap inside the axes > is sheared. I've been looking at the backend_qt4agg code, the > widgets.Cursor code, and the working animation_blit_qt4 example, but I'm > stuck. Does anyone have any ideas?
Here is an additional wrinkle, sometimes the pixmap is sheared, and sometimes it is not. The behavior seems to shift back and forth when I change the horizontal size of the figure window, bu I don't see a pattern emerging that would explain why: 556-559 pixels wide is sheared, 560-564 looks ok, 565-567 is sheared, 568 is normal, 569 and 570 are sheared, etc. The animation_blit_qt4 demo also has the same problem, depending on the horizontal size. So confusing. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
