@@ -1407,14 +1407,17 @@ def __init__(self, name, canvas, x, y, button=None, key=None,
14071407 (*x*, *y*) in figure coords ((0, 0) = bottom left)
14081408 button pressed None, 1, 2, 3, 'up', 'down'
14091409 """
1410- LocationEvent .__init__ (self ,name ,canvas ,x ,y ,guiEvent = guiEvent )
14111410if button in MouseButton .__members__ .values ():
14121411button = MouseButton (button )
14131412self .button = button
14141413self .key = key
14151414self .step = step
14161415self .dblclick = dblclick
14171416
1417+ # super-init is deferred to the end because it calls back on
1418+ # 'axes_enter_event', which requires a fully initialized event.
1419+ LocationEvent .__init__ (self ,name ,canvas ,x ,y ,guiEvent = guiEvent )
1420+
14181421def __str__ (self ):
14191422return (f"{ self .name }
14201423f"xy=({ self .x } { self .y } { self .xdata } { self .ydata }
@@ -1498,8 +1501,9 @@ def on_key(event):
14981501 cid = fig.canvas.mpl_connect('key_press_event', on_key)
14991502 """
15001503def __init__ (self ,name ,canvas ,key ,x = 0 ,y = 0 ,guiEvent = None ):
1501- LocationEvent .__init__ (self ,name ,canvas ,x ,y ,guiEvent = guiEvent )
15021504self .key = key
1505+ # super-init deferred to the end: callback errors if called before
1506+ LocationEvent .__init__ (self ,name ,canvas ,x ,y ,guiEvent = guiEvent )
15031507
15041508
15051509def _get_renderer (figure ,print_method = None ,* ,draw_disabled = False ):