electrum-bitcoinprivate/gui/kivy/uix/ui_screens/settings.kv

Popup:
    id: settings
    title: _('Settings')
    BoxLayout:

        Button:
            size_hint_y: None
            height: '48dp'
            text: 'Button normal'
        
        Button:
            size_hint_y: None
            height: '48dp'
            text: 'Button down'
            state: 'down'

        Button:
            size_hint_y: None
            height: '48dp'
            text: 'Button disabled'
            disabled: True
            
        Button:
            size_hint_y: None
            height: '48dp'
            text: 'close'
            on_release: settings.dismiss()