kivy/examples/demo/kivycatalog/container_kvs/ProgressBarContainer.kv

#:kivy 1.4

BoxLayout:
    orientation: 'vertical'
    padding: 50
    ProgressBar:
        id: bar
        value: 140
        max: 300
    Slider:
        id: slider
        max: 200
        value: 140
        on_value: bar.value = self.value
    Slider:
        orientation: 'vertical'
        on_value: slider.value = self.value