controller.py 文件源码

def userLogout(self, obj):
        content = LogoutScreen(root_self = self)

        self.popup = Popup(
                        title           = 'User Logout',
                        content         = content,
                        auto_dismiss    = False,
                        size_hint       = (None, None),
                        size            = (400, 170)
                    )

        # open the popup
        self.popup.open()

    ###