Merge pull request #22175 from greglucas/macosx-animations

dstansby · web-flow · commit 396a010a6147 · 2022-03-05T09:58:25.000Z
FIX: Update macosx animation handling
diff --git a/lib/matplotlib/animation.py b/lib/matplotlib/animation.py
@@ -1185,9 +1185,16 @@ def _setup_blit(self):
         # Setting up the blit requires: a cache of the background for the Axes
         self._blit_cache = dict()
         self._drawn_artists = []
+        # _post_draw needs to be called first to initialize the renderer
+        self._post_draw(None, self._blit)
+        # Then we need to clear the Frame for the initial draw
+        # This is typically handled in _on_resize because QT and Tk
+        # emit a resize event on launch, but the macosx backend does not,
+        # thus we force it here for everyone for consistency
+        self._init_draw()
+        # Connect to future resize events
         self._resize_id = self._fig.canvas.mpl_connect('resize_event',
                                                        self._on_resize)
-        self._post_draw(None, self._blit)
 
     def _on_resize(self, event):
         # On resize, we need to disable the resize event handling so we don't
diff --git a/src/_macosx.m b/src/_macosx.m
@@ -1294,6 +1294,8 @@ - (void)updateDevicePixelRatio:(double)scale
         goto exit;
     }
     if (PyObject_IsTrue(change)) {
+        // Notify that there was a resize_event that took place
+        gil_call_method(canvas, "resize_event");
         [self setNeedsDisplay: YES];
     }
 

Original file line number	Diff line number	Diff line change
`@@ -1294,6 +1294,8 @@ - (void)updateDevicePixelRatio:(double)scale`
`1294`	`1294`	`goto exit;`
`1295`	`1295`	`}`
`1296`	`1296`	`if (PyObject_IsTrue(change)) {`
	`1297`	`+ // Notify that there was a resize_event that took place`
	`1298`	`+ gil_call_method(canvas, "resize_event");`
`1297`	`1299`	`[self setNeedsDisplay: YES];`
`1298`	`1300`	`}`
`1299`	`1301`