CircuitPython displayio simple round rect using vectorio

simpleroundrect.py

# The MIT License (MIT)
#
# Copyright (c) 2021 Jonah Yolles-Murphy (TG-Techie)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

import displayio

class SimpleRoundRect(displayio.Group):
    def __init__(self, x, y, width, height, radius=0, fill=0xFF0000):
        radius = min(radius, width // 2, height // 2)
        p = displayio.Palette(2)
        s = displayio.Shape(width, height)  
        super().__init__(x=x, y=y, max_size=6)

        p.make_transparent(0)
        p[1] = fill

        self._palette = p
        self._radius = radius

        self._x = x
        self._y = y
        self._width = width
        self._height = height

        right_rad_x = width - radius
        bottom_rad_y = height - radius

        # is_slot = bool(r*2 >= min(width, height))

        self._top_left = top_left = vectorio.VectorShape(
            shape=vectorio.Circle(radius),
            pixel_shader=p,
            x=radius,
            y=radius,
        )

        self._top_right = top_right = vectorio.VectorShape(
            shape=vectorio.Circle(radius),
            pixel_shader=p,
            x=right_rad_x,
            y=radius,
        )

        self._bottom_left = bottom_left = vectorio.VectorShape(
            shape=vectorio.Circle(radius),
            pixel_shader=p,
            x=radius,
            y=bottom_rad_y,
        )

        self._bottom_right = bottom_right = vectorio.VectorShape(
            shape=vectorio.Circle(radius),
            pixel_shader=p,
            x=right_rad_x,
            y=bottom_rad_y,
        )

        w = width - 2 * radius
        if w > 0:
            self._veritcal_fill = vfill = vectorio.VectorShape(
                shape=vectorio.Rectangle(w, height),
                pixel_shader=p,
                x=radius,
                y=0,
            )
            self.append(vfill)

        h = height - 2 * radius
        if h > 0:
            self._horizontal_fill = hfill = vectorio.VectorShape(
                shape=vectorio.Rectangle(width, h),
                pixel_shader=p,
                x=0,
                y=radius,
            )
            self.append(hfill)

        self.append(top_left)
        self.append(top_right)
        self.append(bottom_left)
        self.append(bottom_right)

    @property
    def fill(self) -> int:
        return self._palette[1]

    @fill.setter
    def fill(self, value: int):
        self._palette[1] = value