On 2013/08/23 3:55 AM, Kari Aliranta wrote: > Hello, fellow Matplotlib users, > > > I'm embedding some Matplotlib figures into GUI (PyQt4) windows or widget > canvases using qt4agg as the backend. I'm having problems with these > figures popping up any time when some other part of the program calls > pyplot.show().
Generally, when embedding, one simply does not use the pyplot interface at all, so this sort of problem does not arise. Is there any reason why you can't use this approach? > > How do you avoid this showing of previous figures? Is there some hidden > buffer where the figures go? If there is, what is the way to clear this > buffer, or preferably avoid putting figures in this buffer altogether? > I'd be happy to handle these figures as simple individual objects. To remove a figure created by pyplot, use pyplot.close(fig); but still, trying to use the pyplot interface for anything more complicated than direct interactive use and simple non-interactive scripts is likely to cause more problems than it solves. It's just not what pyplot is designed for. Eric > > (I'm aware that this "hidden buffer" may be the pylab/pyplot buffer. I > tried deepcopying the figure and then clearing the pylab buffer with > pylab.clf() , but figures don't seem to be deepcopyable.) > > > A typical situation is the following: > > - There is a window with a widget. The widget (widgetMpl in the code > below) has a slightly customized FigureCanvas in it. The drawing code is > activated by clicking a button in the window. The code goes as follows. > > # The plot method returns a complicated instance of Figure with > several axes, constructed with Pylab. > previewFigure = > self.parent.experiment.file_to_plot.plot(show=False, n_channels=10) > > self.ui.widgetMpl.canvas.figure = previewFigure > self.ui.widgetMpl.canvas.draw() > > > - I draw the figure in the window once, or several times with different > file_to_plot, by pressing the button. I may or may not close the window > with the aforementioned widget. > > - Elsewhere in the program there is another window with very simple > drawing code using pyplot. When this code calls pyplot.show(), all the > figures drawn in the first window will show up. > > > > > ------------------------------------------------------------------------------ > Introducing Performance Central, a new site from SourceForge and > AppDynamics. Performance Central is your source for news, insights, > analysis and resources for efficient Application Performance Management. > Visit us today! > http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > ------------------------------------------------------------------------------ Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
