<TopRightButton>:
    size_hint: 50, 50
    #:set offset 10
    Button:
        size: self.parent.size_hint
        background_color: .5, .5, .5, 1
        x: self.parent.parent.x + self.parent.parent.size[0] - self.size[0] - offset
        y: self.parent.parent.y + self.parent.parent.size[1] - self.size[1] - offset
        on_press:
            self.background_color = 0, 0, 0.055
            self.parent.parent.click()
        on_release:
            self.background_color = .5, .5, .5, 1
        canvas.before:
            Color:
                rgba: self.background_color
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        Image:
            source: self.parent.parent.parent.buttonImage()
            center_x: self.parent.center_x
            center_y: self.parent.center_y
            allow_stretch: True
            size: self.parent.size