Fix canvas redraws during motion in figures with a Button or TextBox

During motion in figures with Button or TextBox widgets, the stored `color` and `hovercolor` values are compared with the current Axes facecolor. By default, the stored colors are each a string of a float, but the returned facecolor is frequently a tuple of RGBA values. The colors appear to mismatch, triggering a draw event with any motion in the figure. As a fix, convert both the color and facecolor values to RGBA format for comparison in case either value is stored in a different format.

Author: yoda-vid

lib/matplotlib/widgets.py

@@ -16,7 +16,7 @@
 import numpy as np
 
 import matplotlib as mpl
-from . import cbook, ticker
+from . import cbook, colors, ticker
 from .lines import Line2D
 from .patches import Circle, Rectangle, Ellipse
 from .transforms import blended_transform_factory
@@ -220,7 +220,7 @@ def _motion(self, event):
         if self.ignore(event):
             return
         c = self.hovercolor if event.inaxes == self.ax else self.color
-        if c != self.ax.get_facecolor():
+        if not colors.same_color(c, self.ax.get_facecolor()):
             self.ax.set_facecolor(c)
             if self.drawon:
                 self.ax.figure.canvas.draw()
@@ -920,7 +920,7 @@ def _motion(self, event):
         if self.ignore(event):
             return
         c = self.hovercolor if event.inaxes == self.ax else self.color
-        if c != self.ax.get_facecolor():
+        if not colors.same_color(c, self.ax.get_facecolor()):
             self.ax.set_facecolor(c)
             if self.drawon:
                 self.ax.figure.canvas.draw()