Make colorbar draw edge with facecolor around the faces. This was cha…

…nged when matplotlib#901 and was

merged, to allow different edgecolors, due to the way get_edgecolors behave. This restors the
original behavior of colorbar in both mpl and the axisgrid1 toolkit by setting the edgecolor to 'face'

lib/matplotlib/axes.py

@@ -7360,10 +7360,12 @@ def pcolormesh(self, *args, **kwargs):
             'gouraud', each quad will be Gouraud shaded.  When gouraud
             shading, edgecolors is ignored.
 
-          *edgecolors*: [ *None* | ``'None'`` | color | color sequence]
+          *edgecolors*: [ *None* | ``'None'`` | ``'face'`` | color | color sequence]
             If *None*, the rc setting is used by default.
 
-            If ``'None'``, edges will not be visible.
+            If ``'None'``, edges will not be visible. 
+
+            If ``'face'``, edges will have the same color as the faces. 
 
             An mpl color or sequence of colors will set the edge color
 
@@ -7393,7 +7395,7 @@ def pcolormesh(self, *args, **kwargs):
         vmax = kwargs.pop('vmax', None)
         shading = kwargs.pop('shading', 'flat').lower()
         antialiased = kwargs.pop('antialiased', False)
-        kwargs.setdefault('edgecolors', 'None')
+        kwargs.setdefault('edgecolors', 'face')
 
         X, Y, C = self._pcolorargs('pcolormesh', *args)
         Ny, Nx = X.shape

lib/matplotlib/colorbar.py

@@ -445,7 +445,7 @@ def _add_solids(self, X, Y, C):
         kw = dict(cmap=self.cmap,
                   norm=self.norm,
                   alpha=self.alpha,
-                  edgecolors='None')
+                  edgecolors='face')
         # Save, set, and restore hold state to keep pcolor from
         # clearing the axes. Ordinarily this will not be needed,
         # since the axes object should already have hold set.

lib/mpl_toolkits/axes_grid1/colorbar.py

@@ -518,7 +518,7 @@ def _edges(self, X, Y):
 
     def _add_solids(self, X, Y, C):
         '''
-        Draw the colors using :meth:`~matplotlib.axes.Axes.pcolor`;
+        Draw the colors using :meth:`~matplotlib.axes.Axes.pcolormesh`;
         optionally add separators.
         '''
         ## Change to pcolorfast after fixing bugs in some backends...
@@ -537,9 +537,10 @@ def _add_solids(self, X, Y, C):
             args = (X, Y, C)
         else:
             args = (np.transpose(Y), np.transpose(X), np.transpose(C))
-        kw = {'cmap':self.cmap, 'norm':self.norm,
-              'shading':'flat', 'alpha':self.alpha,
-              }
+        kw = dict(cmap=self.cmap,
+                  norm=self.norm,
+                  alpha=self.alpha,
+                  edgecolors='face')
 
         del self.solids
         del self.dividers