ran_kiv/rankiv.kv

<RanNum>:
    BoxLayout:
        orientation: 'vertical'
        Image:
            source: 'zufall.png'
        TextInput:
            id: upper_boundary_input
            multiline: False
            halign: 'center'
            font_size: app.font_size
            size_hint: .8, None
            height: 42
            hint_text: 'Gib eine Zahl ein!'
            input_filter: 'int'
            pos_hint: {'x': .1}
        Label:
            size_hint: None, .2
        Button:
            text: 'Generate!'
            font_size: app.font_size
            size_hint: .5, None
            pos_hint: {'x': .25}
            on_release: app.ran_num.generate_random_number()
        Label:
            id: output
            text: 'Meine Zufallszahl'
            halign: 'center'
            font_size: app.font_size