Re: [matplotlib-devel] Gtk3 app that calls matplotlib

[Thomas A C. <tca...@uc...>]

If you are embedding matplotlib, do not import `pyplot`.  `pyplot` sets up
a bunch of gui-magic (tm) in the background (as you found in
`figure_manager`).

Tom


On Fri, Oct 11, 2013 at 11:57 AM, Federico Ariza
<ari...@gm...>wrote:

> Hello everybody
>
> Working on one GTK3 app, that calls matplotlib to plot some figures, I
> found that closing all the figures from matplotlib kills my app also.
> The problem....
>
> Gtk.main() is called only if there is no previous invocation, in my
> case, my Gtk3 app invokes main, so the mainloop won't call it again.
>
> #in backend_gtk3.py
> #
> class Show(ShowBase):
>     def mainloop(self):
>         if Gtk.main_level() == 0:
>             Gtk.main()
>
> But in the "destroy" method of the figure manager calls Gtk.main_quit
> everytime that there are no more figures
>
> #in backend_gtk3.py inside destroy method of FigureManagerGTK3
> #
> if Gcf.get_num_fig_managers()==0 and \
>                not matplotlib.is_interactive() and \
>                Gtk.main_level() >= 1:
>             Gtk.main_quit()
>
>
> So basically we are not calling Gtk.main but we are Gtk.calling main_quit.
> Isn't it more natural to call Gtk.main the same amount of times that
> we are going to call Gtk.main_quit?
>
> Adding matplotlib.rcParams['interactive'] = True doesn't help
>
> Here is my little testing code
>
> ##############################
> #file myapp.py
>
> import matplotlib
> matplotlib.rcParams['interactive'] = True
> matplotlib.use('GTK3AGG')
> import matplotlib.pyplot as plt
>
> from gi.repository import Gtk
>
> class MyWindow(Gtk.Window):
>
>     def __init__(self):
>         Gtk.Window.__init__(self, title="Hello World")
>
>         self.button = Gtk.Button(label="Click Here")
>         self.button.connect("clicked", self.on_button_clicked)
>         self.add(self.button)
>
>     def on_button_clicked(self, widget):
>         fig = plt.figure()
>         ax = fig.add_subplot(111)
>         ax.plot([1,2,3])
>         plt.show()
>
> win = MyWindow()
> win.connect("delete-event", Gtk.main_quit)
> win.show_all()
> Gtk.main()
> #########################
>
> I know this is related to interactive mode, but running from console
> >>> python myapp.py
> reproduces the problem
>
> Why hasattr(sys, 'ps1') is False? if I am running it from console? how
> do I change this?
>
>
> Thanks
> Federico
>
> P.S. Does anybody had the time to check my PR for multi-figure-manager?
> https://github.com/matplotlib/matplotlib/pull/2465
>
> --
> Y yo que culpa tengo de que ellas se crean todo lo que yo les digo?
>
> -- Antonio Alducin --
>
>
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-- 
Thomas A Caswell
PhD Candidate University of Chicago
Nagel and Gardel labs
tca...@uc...
jfi.uchicago.edu/~tcaswell
o: 773.702.7204