Also handle the Cairo backends.

anntzer · anntzer · commit 42de0e883e6a · 2017-08-23T09:27:42.000-07:00
The wait cursor is not animated, though.
diff --git a/lib/matplotlib/backends/backend_gtk.py b/lib/matplotlib/backends/backend_gtk.py
@@ -387,16 +387,20 @@ def _render_figure(self, pixmap, width, height):
     def expose_event(self, widget, event):
         """Expose_event for all GTK backends. Should not be overridden.
         """
+        toolbar = self.toolbar
+        if toolbar:
+            toolbar.set_cursor(cursors.WAIT)
         if GTK_WIDGET_DRAWABLE(self):
             if self._need_redraw:
                 x, y, w, h = self.allocation
                 self._pixmap_prepare (w, h)
                 self._render_figure(self._pixmap, w, h)
                 self._need_redraw = False
-
             x, y, w, h = event.area
             self.window.draw_drawable (self.style.fg_gc[self.state],
                                        self._pixmap, x, y, x, y, w, h)
+        if toolbar:
+            toolbar.set_cursor(cursors.POINTER)
         return False  # finish event propagation?
 
     filetypes = FigureCanvasBase.filetypes.copy()
diff --git a/lib/matplotlib/backends/backend_gtk3cairo.py b/lib/matplotlib/backends/backend_gtk3cairo.py
@@ -6,6 +6,7 @@
 from . import backend_cairo, backend_gtk3
 from .backend_cairo import cairo, HAS_CAIRO_CFFI
 from .backend_gtk3 import _BackendGTK3
+from matplotlib.backend_bases import cursors
 from matplotlib.figure import Figure
 
 
@@ -35,10 +36,15 @@ def _render_figure(self, width, height):
     def on_draw_event(self, widget, ctx):
         """ GtkDrawable draw event, like expose_event in GTK 2.X
         """
+        toolbar = self.toolbar
+        if toolbar:
+            toolbar.set_cursor(cursors.WAIT)
         self._renderer.set_context(ctx)
         allocation = self.get_allocation()
         x, y, w, h = allocation.x, allocation.y, allocation.width, allocation.height
         self._render_figure(w, h)
+        if toolbar:
+            toolbar.set_cursor(cursors.POINTER)
         return False  # finish event propagation?
 
 
