re-generate legend: re-use: ncol and draggable

anykraus · anykraus · commit 80beedf6b3c5 · 2014-04-22T14:24:38.000+02:00
Copy some properties from the old legend to the new (re-)generated legend.
If the old legend was draggable, the new one is now also.
The number of columns in the legend is passed on from to old legend to the new legend.
diff --git a/lib/matplotlib/backends/qt4_editor/figureoptions.py b/lib/matplotlib/backends/qt4_editor/figureoptions.py
@@ -127,7 +127,10 @@ def apply_callback(data):
         
         # re-generate legend, if checkbox is checked. Stefan Kraus/tacaswell 2014-04-22
         if generate_legend:
+            old_legend = axes.get_legend()
             new_legend = axes.legend()
+            new_legend._ncol = old_legend._ncol
+            new_legend.draggable(old_legend._draggable is not None)
 
         # Redraw
         figure = axes.get_figure()
