<QRCodeWidget>
    on_parent: if args[1]: qrimage.source = self.loading_image
    canvas.before:
        # Draw white Rectangle
        Color:
            rgba: root.background_color
        Rectangle:
            size: self.size
            pos: self.pos
    canvas.after:
        Color:
            rgba: .5, .5, .5, 1 if root.show_border else 0
        Line:
            width: dp(1.333)
            points:
                self.x + dp(2), self.y + dp(2),\
                self.x + self.width - dp(2), self.y + dp(2),\
                self.x + self.width - dp(2), self.y + self.height - dp(2),\
                self.x + dp(2), self.y + self.height - dp(2),\
                self.x + dp(2), self.y + dp(2)
    Image
        id: qrimage
        pos_hint: {'center_x': .5, 'center_y': .5}
        allow_stretch: True
        size_hint: None, None
        size: root.width * .9, root.height * .9