base.kv

#:kivy 1.0.9
<InfoScreen>
    scrmgr: iscreenmgr
    id: iscreen

    ScreenManager:
        id: iscreenmgr
        auto_bring_to_front: False

    HiddenButton:
        id: btn_left
        size: 50, root.height
        size_hint: None, None
        pos: root.width - 50, 0
        on_press: root.next_screen()

    HiddenButton:
        size: 50, root.height
        size_hint: None, None
        pos: 0, 0
        on_press: root.next_screen(True)

<BGLabel>
    padding: 2, 2
    canvas.before:
        Color:
            rgba: self.bgcolour
        Rectangle:
            size: self.size
            pos: self.pos

<BGImage>
    canvas.before:
        Color:
            rgba: self.bgcolour
        Rectangle:
            size: self.size
            pos: self.pos
    canvas.after:
        Color:
            rgba: self.fgcolour
        Rectangle:
            size: self.size
            pos: self.pos