Avoid duplicate cmap in image options.

anntzer · anntzer · commit cf4b2196a067 · 2016-07-09T19:32:17.000-07:00
The previous implementation was incorrect and would yield a double entry
in the cmap combobox.
diff --git a/lib/matplotlib/backends/qt_editor/figureoptions.py b/lib/matplotlib/backends/qt_editor/figureoptions.py
@@ -137,7 +137,7 @@ def prepare_data(d, init):
     for label in imagelabels:
         image = imagedict[label]
         cmap = image.get_cmap()
-        if cmap not in cm.cmap_d:
+        if cmap not in cm.cmap_d.values():
             cmaps = [(cmap, cmap.name)] + cmaps
         imagedata = [
             ('Label', label),
