[FIXED] Python - matplotlib: how to change RectangleSelector properties

Issue

Is it possible to change RectangleSelector properties after it has been created?

Let's say I created a figure with the following rectangle:

from matplotlib.widgets import RectangleSelector
import matplotlib.pyplot as plt

def on_click(eclick, erelease):
    pass

fig, current_ax = plt.subplots()
RS = RectangleSelector(current_ax, on_click, drawtype='box', 
                        useblit=True, button=[1, 3], interactive=True,
                        minspanx=1, minspany=1, spancoords='pixels',
                        rectprops=dict(linestyle='-', color='g', 
                                       fill=True, alpha=1))
plt.show()

What if I want to change the rectangle color?

I would do:

RS.rectprops['color'] = 'r'
RS.canvas.draw()
fig.canvas.draw()

But this doesn't affect the color of the rectangle.

Any clue?

Thanks

Solution

If you want to update the rectangle patch you have drawn on the figure, not the widget, you can use:

current_ax.patches[0].set_facecolor('r')

or alternatively (credit to JohanC):

RS.artists[0].set_facecolor('r')

After clicking on the rectangle again, it will change color

Answered By - tmdavison