[ENH]: Please add matplotlib.patches.RoundedRectangle

[dipeshSam]

Problem

• I'm always frustrated when matplotlib.patches.Rectangle does not round the corners of the rectangle because it requires padding and other rectangle-irrelevant values.
• I would like it if there is a clsas or method like matplotlib.patches.RoundedRectangle(xy, width, height, corner_radius, **kwargs) that can take any radius <= min(width, height) because matplotlib.patches.FancyBboxPatch does not round the rectangle as much as possible.
• Here is a sample image of what I am asking for
  

Proposed solution

Please add/implement matplotlib.patches.RoundedRectangle(xy, width, height, corner_radius, **kwargs)

[saranti]

You can round the edges a fair amount using the boxstyle parameter
e.g.

import matplotlib.pyplot as plt
import matplotlib.patches as patches

fig, ax = plt.subplots()
rect = patches.FancyBboxPatch((.2, .2),
                              boxstyle="round, pad=0.1, rounding_size=0.2",
                              width=.4,
                              height=.4,
                              fill=True)
ax.add_patch(rect)
ax.set_aspect('equal')
plt.show()

[dipeshSam]

@saranti Wow nice! Thank you brother. Could you please tell me what's relation between the two: pad=0.1 and rounding_size=0.2?

I mean, how rounding_size requires pad value or how pad value affects rounding_size?

Let, given that width and height are equal. Then, if rounding_size = width/2 must produce a circle of the same radius as rounding_size.

Thanks again.