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adding global variable to keep track if gtkmain has been called #2604

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adding global variable to keep track if gtkmain has been called #2604

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7 changes: 5 additions & 2 deletions lib/matplotlib/backends/backend_gtk.py
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Original file line number Diff line number Diff line change
Expand Up @@ -79,10 +79,12 @@ def draw_if_interactive():
if figManager is not None:
figManager.canvas.draw_idle()


gtk_main_called = False
class Show(ShowBase):
def mainloop(self):
if gtk.main_level() == 0:
global gtk_main_called
gtk_main_called = True
gtk.main()

show = Show()
Expand Down Expand Up @@ -606,7 +608,8 @@ def destroy(self, *args):

if Gcf.get_num_fig_managers()==0 and \
not matplotlib.is_interactive() and \
gtk.main_level() >= 1:
gtk.main_level() >= 1 and \
gtk_main_called:
gtk.main_quit()

def show(self):
Expand Down
6 changes: 5 additions & 1 deletion lib/matplotlib/backends/backend_gtk3.py
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Original file line number Diff line number Diff line change
Expand Up @@ -67,9 +67,12 @@ def draw_if_interactive():
if figManager is not None:
figManager.canvas.draw_idle()

gtk_main_called = False
class Show(ShowBase):
def mainloop(self):
if Gtk.main_level() == 0:
global gtk_main_called
gtk_main_called = True
Gtk.main()

show = Show()
Expand Down Expand Up @@ -437,7 +440,8 @@ def destroy(self, *args):

if Gcf.get_num_fig_managers()==0 and \
not matplotlib.is_interactive() and \
Gtk.main_level() >= 1:
Gtk.main_level() >= 1 and \
gtk_main_called:
Gtk.main_quit()

def show(self):
Expand Down