Emit xlim_changed on shared axes.

Author: anntzer

lib/matplotlib/axis.py

@@ -1241,11 +1241,13 @@ def _set_lim(self, v0, v1, *, emit=True, auto):
             self.axes.callbacks.process(f"{name}lim_changed", self.axes)
             # Call all of the other axes that are shared with this one
             for other in self._get_shared_axes():
-                if other is not self.axes:
-                    other._axis_map[name]._set_lim(
-                        v0, v1, emit=False, auto=auto)
-                    if other.figure != self.figure:
-                        other.figure.canvas.draw_idle()
+                if other is self.axes:
+                    continue
+                other._axis_map[name]._set_lim(v0, v1, emit=False, auto=auto)
+                if emit:
+                    other.callbacks.process(f"{name}lim_changed", other)
+                if other.figure != self.figure:
+                    other.figure.canvas.draw_idle()
 
         self.stale = True
         return v0, v1

lib/matplotlib/tests/test_axes.py

@@ -8794,3 +8794,12 @@ def test_set_secondary_axis_color():
     assert mcolors.same_color(sax.xaxis.get_tick_params()["color"], "red")
     assert mcolors.same_color(sax.xaxis.get_tick_params()["labelcolor"], "red")
     assert mcolors.same_color(sax.xaxis.label.get_color(), "red")
+
+
+def test_xylim_changed_shared():
+    fig, axs = plt.subplots(2, sharex=True, sharey=True)
+    events = []
+    axs[1].callbacks.connect("xlim_changed", events.append)
+    axs[1].callbacks.connect("ylim_changed", events.append)
+    axs[0].set(xlim=[1, 3], ylim=[2, 4])
+    assert events == [axs[1], axs[1]]