Merge pull request matplotlib#2867 from timovwb/master

GTK3 backend: implemented FigureCanvasBase.resize_event()

Author: tacaswell

lib/matplotlib/backends/backend_gtk3.py

@@ -200,6 +200,7 @@ def __init__(self, figure):
         self.connect('motion_notify_event',  self.motion_notify_event)
         self.connect('leave_notify_event',   self.leave_notify_event)
         self.connect('enter_notify_event',   self.enter_notify_event)
+        self.connect('size_allocate',        self.size_allocate)
 
         self.set_events(self.__class__.event_mask)
 
@@ -275,6 +276,17 @@ def leave_notify_event(self, widget, event):
     def enter_notify_event(self, widget, event):
         FigureCanvasBase.enter_notify_event(self, event)
 
+    def size_allocate(self, widget, allocation):
+        if _debug:
+            print("FigureCanvasGTK3.%s" % fn_name())
+            print("size_allocate (%d x %d)" % (allocation.width, allocation.height))
+        dpival = self.figure.dpi
+        winch = allocation.width / dpival
+        hinch = allocation.height / dpival
+        self.figure.set_size_inches(winch, hinch)
+        FigureCanvasBase.resize_event(self)
+        self.draw_idle()
+
     def _get_key(self, event):
         if event.keyval in self.keyvald:
             key = self.keyvald[event.keyval]