Correct label location in pie chart. Thanks Benoit Hirbec!

mdboom · mdboom · commit 05c8058ce98d · 2008-06-13T12:46:20.000Z
svn path=/trunk/matplotlib/; revision=5502
diff --git a/CHANGELOG b/CHANGELOG
@@ -1,3 +1,6 @@
+2008-06-13 Change pie chart label alignment to avoid having labels
+           overwrite the pie - MGD
+
 2008-06-12 Added some helper functions to the mathtext parser to
            return bitmap arrays or write pngs to make it easier to use
            mathtext outside the context of an mpl figure.  modified
diff --git a/lib/matplotlib/axes.py b/lib/matplotlib/axes.py
@@ -3953,10 +3953,11 @@ def pie(self, x, explode=None, labels=None, colors=None,
 
             xt = x + labeldistance*radius*math.cos(thetam)
             yt = y + labeldistance*radius*math.sin(thetam)
+            label_alignment = xt > 0 and 'left' or 'right'
 
             t = self.text(xt, yt, label,
                           size=rcParams['xtick.labelsize'],
-                          horizontalalignment='center',
+                          horizontalalignment=label_alignment,
                           verticalalignment='center')
 
             texts.append(t)
