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

Popup:
    id: nd
    title: _('Network')
    n_nodes: len(app.network.get_interfaces())
    blockchain_height: app.network.get_local_height()
    is_connected: app.network.is_connected()
    on_open:
        host.text, nd.port, nd.protocol, nd.proxy, auto_connect.active = app.network.get_parameters()

    BoxLayout:
        orientation: 'vertical'
        TopLabel:
            s1: _("Connected to %d nodes.")%root.n_nodes if root.n_nodes else _("Not connected?")
            s2: _("Blockchain length") + ": %d "%root.blockchain_height + _("blocks")
            text: self.s1 + '\n' + self.s2
        Widget:
            size_hint: 1, 0.1
        GridLayout:
            cols: 2
            Label:
                text: _('Address server')
            Spinner:
                id: host
                height: '48dp'
                text: ''
                values: sorted(app.network.get_servers())
                disabled: auto_connect.active
            Label:
                text: _('Auto-connect')
            CheckBox:
                id: auto_connect
                size_hint_y: None
        Widget:
            size_hint: 1, 0.1
        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()