matplotlib
diff --git a/‎lib/matplotlib/backends/backend_gdk.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_gdk.py
+7-1Lines changed: 7 additions & 1 deletion b/‎lib/matplotlib/backends/backend_gdk.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_gdk.py
+7-1Lines changed: 7 additions & 1 deletion
diff --git a/‎lib/matplotlib/backends/backend_gtk.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_gtk.py
+7Lines changed: 7 additions & 0 deletions b/‎lib/matplotlib/backends/backend_gtk.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_gtk.py
+7Lines changed: 7 additions & 0 deletions
@@ -26,7 +26,7 @@ def fn_name(): return sys._getframe(1).f_code.co_name
 from matplotlib._pylab_helpers import Gcf
 from matplotlib.backend_bases import RendererBase, GraphicsContextBase, \
      FigureManagerBase, FigureCanvasBase
-from matplotlib.cbook import is_string_like, restrict_dict
+from matplotlib.cbook import is_string_like, restrict_dict, warn_deprecated
 from matplotlib.figure import Figure
 from matplotlib.mathtext import MathTextParser
 from matplotlib.transforms import Affine2D
@@ -441,6 +441,12 @@ def _renderer_init(self):
         self._renderer = RendererGDK (gtk.DrawingArea(), self.figure.dpi)
 
     def _render_figure(self, pixmap, width, height):
+        if isinstance(self._renderer, RendererGDK):
+            warn_deprecated('2.0', message="The GDK backend is "
+                            "deprecated. It is untested, known to be "
+                            "broken and will be removed in Matplotlib 2.2. "
+                            "Use the Agg backend instead.",
+                            alternative="Agg")
         self._renderer.set_pixmap (pixmap)
         self._renderer.set_width_height (width, height)
         self.figure.draw (self._renderer)
 
@@ -37,6 +37,7 @@ def fn_name(): return sys._getframe(1).f_code.co_name
 from matplotlib.cbook import is_string_like, is_writable_file_like
 from matplotlib.figure import Figure
 from matplotlib.widgets import SubplotTool
+from matplotlib.cbook import warn_deprecated
 
 from matplotlib import (
     cbook, colors as mcolors, lines, markers, rcParams, verbose)
@@ -418,6 +419,12 @@ def _pixmap_prepare(self, width, height):
     def _render_figure(self, pixmap, width, height):
         """used by GTK and GTKcairo. GTKAgg overrides
         """
+        if isinstance(self._renderer, RendererGDK):
+            warn_deprecated('2.0', message="The GTK backend is "
+                            "deprecated. It is untested, known to be "
+                            "broken and will be removed in Matplotlib 2.2. "
+                            "Use the GTKAgg backend instead.",
+                            alternative="GTKAgg")
         self._renderer.set_width_height (width, height)
         self.figure.draw (self._renderer)