Sideband/sbapp/kivymd/uix/progressbar/progressbar.kv

<MDProgressBar>
    canvas:
        Clear
        Color:
            rgba:
                self.theme_cls.divider_color \
                if not self.back_color else \
                self.back_color
        RoundedRectangle:
            radius: root.radius
            size:
                (self.width, self.height) \
                if self.orientation == "horizontal" else \
                (self.width, self.height)
            pos:
                (self.x, self.center_y - self.height / 2) \
                if self.orientation == "horizontal" else \
                (self.center_x - self.width / 2, self.y)
        Color:
            rgba:
                self.theme_cls.primary_color if not self.color else self.color
        RoundedRectangle:
            radius: root.radius
            size:
                (self.width * self.value_normalized, self.height if self.height else dp(4)) \
                if self.orientation == "horizontal" else \
                (self.width, self.height * self.value_normalized)
            pos:
                (self.width * (1 - self.value_normalized) + self.x \
                if self.reversed else self.x + self._x, self.center_y - self.height / 2) \
                if self.orientation == "horizontal" \
                else (self.center_x - self.width / 2, self.height \
                * (1 - self.value_normalized) + self.y if self.reversed \
                else self.y)