Add simulated mouse events to cursor demos

So that the cursors show up on online docs

Author: ksunden

examples/event_handling/cursor_demo.py

@@ -28,6 +28,8 @@
 import matplotlib.pyplot as plt
 import numpy as np
 
+from matplotlib.backend_bases import MouseEvent
+
 
 class Cursor:
     """
@@ -71,6 +73,11 @@ def on_mouse_move(self, event):
 cursor = Cursor(ax)
 fig.canvas.mpl_connect('motion_notify_event', cursor.on_mouse_move)
 
+# Simulate a mouse move to (0.5, 0.5), needed for online docs
+t = ax.transData
+MouseEvent(
+    "motion_notify_event", ax.figure.canvas, *t.transform((0.5, 0.5))
+)._process()
 
 # %%
 # Faster redrawing using blitting
@@ -85,6 +92,7 @@ def on_mouse_move(self, event):
 # created whenever the figure changes. This is achieved by connecting to the
 # ``'draw_event'``.
 
+
 class BlittedCursor:
     """
     A cross-hair cursor using blitting for faster redraw.
@@ -152,6 +160,11 @@ def on_mouse_move(self, event):
 blitted_cursor = BlittedCursor(ax)
 fig.canvas.mpl_connect('motion_notify_event', blitted_cursor.on_mouse_move)
 
+# Simulate a mouse move to (0.5, 0.5), needed for online docs
+t = ax.transData
+MouseEvent(
+    "motion_notify_event", ax.figure.canvas, *t.transform((0.5, 0.5))
+)._process()
 
 # %%
 # Snapping to data points
@@ -165,6 +178,7 @@ def on_mouse_move(self, event):
 # the lag due to many redraws. Of course, blitting could still be added on top
 # for additional speedup.
 
+
 class SnappingCursor:
     """
     A cross-hair cursor that snaps to the data point of a line, which is
@@ -218,4 +232,11 @@ def on_mouse_move(self, event):
 line, = ax.plot(x, y, 'o')
 snap_cursor = SnappingCursor(ax, line)
 fig.canvas.mpl_connect('motion_notify_event', snap_cursor.on_mouse_move)
+
+# Simulate a mouse move to (0.5, 0.5), needed for online docs
+t = ax.transData
+MouseEvent(
+    "motion_notify_event", ax.figure.canvas, *t.transform((0.5, 0.5))
+)._process()
+
 plt.show()

examples/widgets/annotated_cursor.py

@@ -24,6 +24,8 @@
 import numpy as np
 import matplotlib.pyplot as plt
 
+from matplotlib.backend_bases import MouseEvent
+
 
 class AnnotatedCursor(Cursor):
     """
@@ -312,6 +314,12 @@ def _update(self):
     color='red',
     linewidth=2)
 
+# Simulate a mouse move to (-2, 10), needed for online docs
+t = ax.transData
+MouseEvent(
+    "motion_notify_event", ax.figure.canvas, *t.transform((-2, 10))
+)._process()
+
 plt.show()
 
 # %%
@@ -339,4 +347,10 @@ def _update(self):
     useblit=True,
     color='red', linewidth=2)
 
+# Simulate a mouse move to (-2, 10), needed for online docs
+t = ax.transData
+MouseEvent(
+    "motion_notify_event", ax.figure.canvas, *t.transform((-2, 10))
+)._process()
+
 plt.show()