SF.net SVN: matplotlib:[8734] branches/v1_0_maint/lib/matplotlib/legend.py

[<lee...@us...>]

Revision: 8734
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=8734&view=rev
Author:   leejjoon
Date:     2010-10-08 01:23:22 +0000 (Fri, 08 Oct 2010)

Log Message:
-----------
fix bbox_to_anchor for draggable legend

Modified Paths:
--------------
    branches/v1_0_maint/lib/matplotlib/legend.py

Modified: branches/v1_0_maint/lib/matplotlib/legend.py
===================================================================
--- branches/v1_0_maint/lib/matplotlib/legend.py	2010-10-07 14:19:00 UTC (rev 8733)
+++ branches/v1_0_maint/lib/matplotlib/legend.py	2010-10-08 01:23:22 UTC (rev 8734)
@@ -51,11 +51,17 @@
         loc_in_canvas = self.get_loc_in_canvas()
 
         bbox = self.legend.get_bbox_to_anchor()
+
+        # if bbox has zero width or height, the transformation is
+        # ill-defined. Fall back to the defaul bbox_to_anchor.
+        if bbox.width ==0 or bbox.height ==0:
+            self.legend.set_bbox_to_anchor(None)
+            bbox = self.legend.get_bbox_to_anchor()
+            
         _bbox_transform = BboxTransformFrom(bbox)
         self.legend._loc = tuple(_bbox_transform.transform_point(loc_in_canvas))
 
 
-
 class Legend(Artist):
     """
     Place a legend on the axes at location loc.  Labels are a


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