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

Popup:
    id: nd
    title: _('Network')

    on_open:
        host.text, nd.port, nd.protocol, nd.proxy, auto_connect.active = app.network.get_parameters()

    BoxLayout:

        orientation: 'vertical'

        GridLayout:
            cols: 2
            Label:
                text: _('Auto-connect')
            CheckBox:
                id: auto_connect
                size_hint_y: None
            Label:
                text: _('Server')
            Spinner:
                id: host
                text: ''
                values: app.network.get_servers()

        Widget:
            size_hint: 1, 1

        BoxLayout:
            Widget:
                size_hint: 0.5, None
            Button:
                size_hint: 0.5, None
                height: '48dp'
                text: _('OK')
                on_release:
                    app.network.set_parameters(host.text, nd.port, nd.protocol, nd.proxy, auto_connect.active)
                    nd.dismiss()