def settings_dialog(self):
        if self._settings_dialog is None:
            from uix.dialogs.settings import SettingsDialog

            self._settings_dialog = SettingsDialog(self)
        self._settings_dialog.update()
        self._settings_dialog.open()

 def popup_dialog(self, name):
     if name == 'settings':
         from uix.dialogs.settings import SettingsDialog
         d = SettingsDialog(self)
         d.open()
     elif name == 'wallets':
         from uix.dialogs.wallets import WalletDialog
         d = WalletDialog()
         d.open()
     else:
         popup = Builder.load_file('gui/kivy/uix/ui_screens/'+name+'.kv')
         popup.open()

    def popup_dialog(self, name):
        if name == "settings":
            from uix.dialogs.settings import SettingsDialog

            d = SettingsDialog(self)
            d.open()
        elif name == "wallets":
            from uix.dialogs.wallets import WalletDialog

            d = WalletDialog()
            d.open()
        else:
            popup = Builder.load_file("gui/kivy/uix/ui_screens/" + name + ".kv")
            popup.open()

#.........这里部分代码省略.........

    def on_key_down(self, instance, key, keycode, codepoint, modifiers):
        if 'ctrl' in modifiers:
            # q=24 w=25
            if keycode in (24, 25):
                self.stop()
            elif keycode == 27:
                # r=27
                # force update wallet
                self.update_wallet()
            elif keycode == 112:
                # pageup
                #TODO move to next tab
                pass
            elif keycode == 117:
                # pagedown
                #TODO move to prev tab
                pass
        #TODO: alt+tab_number to activate the particular tab

    def on_keyboard(self, instance, key, keycode, codepoint, modifiers):
        if key == 27 and self.is_exit is False:
            self.is_exit = True
            self.show_info(_('Press again to exit'))
            return True
        self.is_exit = False
        # override settings button
        if key in (319, 282): #f1/settings button on android
            #self.gui.main_gui.toggle_settings(self)
            return True

    def settings_dialog(self):
        if self._settings_dialog is None:
            from uix.dialogs.settings import SettingsDialog
            self._settings_dialog = SettingsDialog(self)
        self._settings_dialog.update()
        self._settings_dialog.open()

    def popup_dialog(self, name):
        if name == 'settings':
            self.settings_dialog()
        elif name == 'wallets':
            from uix.dialogs.wallets import WalletDialog
            d = WalletDialog()
            d.open()
        else:
            popup = Builder.load_file('gui/kivy/uix/ui_screens/'+name+'.kv')
            popup.open()

    @profiler
    def init_ui(self):
        ''' Initialize The Ux part of electrum. This function performs the basic
        tasks of setting up the ui.
        '''
        from weakref import ref

        self.funds_error = False
        # setup UX
        self.screens = {}

        #setup lazy imports for mainscreen
        Factory.register('AnimatedPopup',
                         module='electrum_gui.kivy.uix.dialogs')
        Factory.register('QRCodeWidget',
                         module='electrum_gui.kivy.uix.qrcodewidget')

#.........这里部分代码省略.........
            self.wallet = None

    def on_key_down(self, instance, key, keycode, codepoint, modifiers):
        if "ctrl" in modifiers:
            # q=24 w=25
            if keycode in (24, 25):
                self.stop()
            elif keycode == 27:
                # r=27
                # force update wallet
                self.update_wallet()
            elif keycode == 112:
                # pageup
                # TODO move to next tab
                pass
            elif keycode == 117:
                # pagedown
                # TODO move to prev tab
                pass
        # TODO: alt+tab_number to activate the particular tab

    def on_keyboard(self, instance, key, keycode, codepoint, modifiers):
        if key == 27 and self.is_exit is False:
            self.is_exit = True
            self.show_info(_("Press again to exit"))
            return True
        # override settings button
        if key in (319, 282):  # f1/settings button on android
            # self.gui.main_gui.toggle_settings(self)
            return True

    def settings_dialog(self):
        if self._settings_dialog is None:
            from uix.dialogs.settings import SettingsDialog

            self._settings_dialog = SettingsDialog(self)
        self._settings_dialog.update()
        self._settings_dialog.open()

    def popup_dialog(self, name):
        if name == "settings":
            self.settings_dialog()
        elif name == "wallets":
            from uix.dialogs.wallets import WalletDialog

            d = WalletDialog()
            d.open()
        else:
            popup = Builder.load_file("gui/kivy/uix/ui_screens/" + name + ".kv")
            popup.open()

    @profiler
    def init_ui(self):
        """ Initialize The Ux part of electrum. This function performs the basic
        tasks of setting up the ui.
        """
        from weakref import ref

        self.funds_error = False
        # setup UX
        self.screens = {}

        # setup lazy imports for mainscreen
        Factory.register("AnimatedPopup", module="electrum_gui.kivy.uix.dialogs")
        Factory.register("QRCodeWidget", module="electrum_gui.kivy.uix.qrcodewidget")