Trigger event loop after setting cursor.

anntzer · anntzer · commit 54689d75f12b · 2017-08-23T09:27:42.000-07:00
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -3201,6 +3201,11 @@ def save_figure(self, *args):
 
     def set_cursor(self, cursor):
         """Set the current cursor to one of the :class:`Cursors` enums values.
+
+        If required by the backend, this method should trigger an update in
+        the backend event loop after the cursor is set, as this method may be
+        called e.g. before a long-running task during which the GUI is not
+        updated.
         """
 
     def update(self):
diff --git a/lib/matplotlib/backends/backend_gtk.py b/lib/matplotlib/backends/backend_gtk.py
@@ -624,6 +624,7 @@ def set_message(self, s):
 
     def set_cursor(self, cursor):
         self.canvas.window.set_cursor(cursord[cursor])
+        gtk.main_iteration()
 
     def release(self, event):
         try: del self._pixmapBack
diff --git a/lib/matplotlib/backends/backend_gtk3.py b/lib/matplotlib/backends/backend_gtk3.py
@@ -500,7 +500,7 @@ def set_message(self, s):
 
     def set_cursor(self, cursor):
         self.canvas.get_property("window").set_cursor(cursord[cursor])
-        #self.canvas.set_cursor(cursord[cursor])
+        Gtk.main_iteration()
 
     def release(self, event):
         try: del self._pixmapBack
diff --git a/lib/matplotlib/backends/backend_tkagg.py b/lib/matplotlib/backends/backend_tkagg.py
@@ -698,6 +698,7 @@ def release(self, event):
 
     def set_cursor(self, cursor):
         self.window.configure(cursor=cursord[cursor])
+        self.window.update_idletasks()
 
     def _Button(self, text, file, command, extension='.gif'):
         img_file = os.path.join(
diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -1595,6 +1595,7 @@ def save_figure(self, *args):
     def set_cursor(self, cursor):
         cursor = wxc.Cursor(cursord[cursor])
         self.canvas.SetCursor(cursor)
+        self.canvas.Update()
 
     def release(self, event):
         try:
