Select RadioButtons by closest in position. (#13268)

mromanie · timhoffm · commit 5d475d1dd8b6 · 2019-01-25T01:50:38.000+01:00
* Select RadioButtons by closest in position. Modify the selection criterion for RadioButtons so that the closest to the mouse click is activated. * Update widgets.py * Update widgets.py @timhoffm Done!
diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
@@ -1058,11 +1058,14 @@ def _clicked(self, event):
             return
         xy = self.ax.transAxes.inverted().transform_point((event.x, event.y))
         pclicked = np.array([xy[0], xy[1]])
+        distances = {}
         for i, (p, t) in enumerate(zip(self.circles, self.labels)):
             if (t.get_window_extent().contains(event.x, event.y)
                     or np.linalg.norm(pclicked - p.center) < p.radius):
-                self.set_active(i)
-                break
+                distances[i] = np.linalg.norm(pclicked - p.center)
+        if len(distances) > 0:
+            closest = min(distances, key=distances.get)
+            self.set_active(closest)
 
     def set_active(self, index):
         """
