fix detection of which artist(s) the mouse is over

megies · megies · commit d0762c3ded7a · 2018-10-06T11:49:50.000+02:00
since Artist.contains() returns a tuple it is not usable like
"if my_artist.contains(): do something"
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -2681,7 +2681,7 @@ def mouse_move(self, event):
                 pass
             else:
                 artists = [a for a in event.inaxes._mouseover_set
-                           if a.contains(event) and a.get_visible()]
+                           if a.contains(event)[0] and a.get_visible()]
 
                 if artists:
                     a = cbook._topmost_artist(artists)
