Don't associate Wx timers with the parent frame.

anntzer · anntzer · commit 4270fd09e337 · 2018-07-08T22:05:15.000+02:00
This is consistent with the behavior on Qt and GTK, and avoids a
segfault due to lack of disconnection of the timer after the parent
widget is destroyed (otherwise, we'd need to keep track of timers
associated with each widget and tear them down when the widget is
destroyed).
diff --git a/doc/api/next_api_changes/2018-02-15-AL-deprecations.rst b/doc/api/next_api_changes/2018-02-15-AL-deprecations.rst
@@ -48,3 +48,6 @@ The following rcParams are deprecated:
 The following keyword arguments are deprecated:
 - passing ``verts`` to ``Axes.scatter`` (use ``marker`` instead),
 - passing ``obj_type`` to ``cbook.deprecated``,
+
+The following call signatures are deprecated:
+- passing a ``wx.EvtHandler`` as first argument to ``backend_wx.TimerWx``,
diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -118,19 +118,15 @@ class TimerWx(TimerBase):
 
     '''
 
-    def __init__(self, parent, *args, **kwargs):
+    def __init__(self, *args, **kwargs):
+        if isinstance(args[0], wx.EvtHandler):
+            cbook.warn_deprecated(
+                "3.0", "Passing a wx.EvtHandler as first argument to the "
+                "TimerWx constructor is deprecated since %(version)s.")
+            args = args[1:]
         TimerBase.__init__(self, *args, **kwargs)
-
-        # Create a new timer and connect the timer event to our handler.
-        # For WX, the events have to use a widget for binding.
-        self.parent = parent
-        self._timer = wx.Timer(self.parent, wx.NewId())
-        self.parent.Bind(wx.EVT_TIMER, self._on_timer, self._timer)
-
-     # Unbinding causes Wx to stop for some reason. Disabling for now.
-#    def __del__(self):
-#        TimerBase.__del__(self)
-#        self.parent.Bind(wx.EVT_TIMER, None, self._timer)
+        self._timer = wx.Timer()
+        self._timer.Notify = self._on_timer
 
     def _timer_start(self):
         self._timer.Start(self._interval, self._single)
@@ -144,9 +140,6 @@ def _timer_set_interval(self):
     def _timer_set_single_shot(self):
         self._timer.Start()
 
-    def _on_timer(self, *args):
-        TimerBase._on_timer(self)
-
 
 class RendererWx(RendererBase):
     """
@@ -704,7 +697,7 @@ def new_timer(self, *args, **kwargs):
             will be executed by the timer every *interval*.
 
         """
-        return TimerWx(self, *args, **kwargs)
+        return TimerWx(*args, **kwargs)
 
     def flush_events(self):
         wx.Yield()
