+ Label:
+ font_name: h.path() + "fonts/Ubuntu-Regular.ttf"
+ font_size: math.ceil(2 * math.sqrt(self.parent.key_size or 10))
+ color: 0, 0, 0, 1
+ text: "volume: {}%".format(self.parent.master_volume)
+ valign: "top"
+ size_hint: None, None
+ size: self.texture_size[0], self.texture_size[1]
+ x: self.parent.width - self.width - 2 * self.parent.key_size / 3
+ center_y: self.parent.height - self.height