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().
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.
(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.
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