Python - matplotlib: how to change RectangleSelector properties

Question

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

Thanks. Both your comment and the accepted answer work fine! — Tommaso
– Tommaso, Commented Mar 4, 2021 at 14:05

tmdavison · Accepted Answer · 2021-03-04 14:47:51Z

1

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

edited Mar 4, 2021 at 14:47

answered Mar 4, 2021 at 13:57

tmdavison

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