Icon for font awesome 3.2.1 and 4

Carreau · pelson · commit ff1515b44932 · 2014-10-02T17:38:16.000+01:00
Should fix matplotlib#3606
diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
@@ -81,14 +81,17 @@ def connection_info():
     return '\n'.join(result)
 
 
-# Note: Version 3.2 icons, not the later 4.0 ones.
+# Note: Version 3.2 and 4.x icons
 # http://fontawesome.io/3.2.1/icons/
+# http://fontawesome.io/
+# the `fa fa-xxx` part targets font-awesome 4, (IPython 3.x)
+# the icon-xxx targets font awesome 3.21 (IPython 2.x)
 _FONT_AWESOME_CLASSES = {
-    'home': 'icon-home',
-    'back': 'icon-arrow-left',
-    'forward': 'icon-arrow-right',
-    'zoom_to_rect': 'icon-check-empty',
-    'move': 'icon-move',
+    'home': 'fa fa-home icon-home',
+    'back': 'fa fa-arrow-left icon-arrow-left',
+    'forward': 'fa fa--arrow-right icon-arrow-right',
+    'zoom_to_rect': 'fa fa-square-o icon-check-empty',
+    'move': 'fa fa-arrows icon-move',
     None: None
 }
 
