Fix cursor_demo wrt. Line2D.set_x/ydata not accepting scalars anymore.

anntzer · anntzer · commit bb1e1a02d075 · 2023-01-29T19:52:04.000+01:00
Trying to run the example prior to the PR would result in exceptions
being thrown on mouse moves.
diff --git a/examples/event_handling/cursor_demo.py b/examples/event_handling/cursor_demo.py
@@ -56,8 +56,8 @@ def on_mouse_move(self, event):
             self.set_cross_hair_visible(True)
             x, y = event.xdata, event.ydata
             # update the line positions
-            self.horizontal_line.set_ydata(y)
-            self.vertical_line.set_xdata(x)
+            self.horizontal_line.set_ydata([y])
+            self.vertical_line.set_xdata([x])
             self.text.set_text(f'x={x:1.2f}, y={y:1.2f}')
             self.ax.figure.canvas.draw()
 
@@ -132,8 +132,8 @@ def on_mouse_move(self, event):
             self.set_cross_hair_visible(True)
             # update the line positions
             x, y = event.xdata, event.ydata
-            self.horizontal_line.set_ydata(y)
-            self.vertical_line.set_xdata(x)
+            self.horizontal_line.set_ydata([y])
+            self.vertical_line.set_xdata([x])
             self.text.set_text(f'x={x:1.2f}, y={y:1.2f}')
 
             self.ax.figure.canvas.restore_region(self.background)
@@ -204,8 +204,8 @@ def on_mouse_move(self, event):
             x = self.x[index]
             y = self.y[index]
             # update the line positions
-            self.horizontal_line.set_ydata(y)
-            self.vertical_line.set_xdata(x)
+            self.horizontal_line.set_ydata([y])
+            self.vertical_line.set_xdata([x])
             self.text.set_text(f'x={x:1.2f}, y={y:1.2f}')
             self.ax.figure.canvas.draw()
 
diff --git a/examples/widgets/annotated_cursor.py b/examples/widgets/annotated_cursor.py
@@ -18,16 +18,16 @@
     The figure related to this example does not show the cursor, because that
     figure is automatically created in a build queue, where the first mouse
     movement, which triggers the cursor creation, is missing.
-
 """
+
 from matplotlib.widgets import Cursor
 import numpy as np
 import matplotlib.pyplot as plt
 
 
 class AnnotatedCursor(Cursor):
     """
-    A crosshair cursor like `~matplotlib.widgets.Cursor` with a text showing \
+    A crosshair cursor like `~matplotlib.widgets.Cursor` with a text showing
     the current coordinates.
 
     For the cursor to remain responsive you must keep a reference to it.
