text: ###############################################################################
  #
  # The MIT License (MIT)
  #
  # Copyright (c) Crossbar.io Technologies GmbH
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  #
  ###############################################################################
  
  import wx
  import json
  from pprint import pprint
  
  from autobahn.twisted.websocket import WebSocketClientProtocol, \
      WebSocketClientFactory
  
  
  class MyFrame(wx.Frame):
  
      """
      Our UI frame to show.
  
      This is taken from http://www.wxpython.org/test7.py.html and modified
      for sending events via WebSocket.
      """
  
      def __init__(self, app):
          # First, call the base class' __init__ method to create the frame
          wx.Frame.__init__(self, None, -1, "wxPython/Autobahn WebSocket Demo")
          self._app = app
  
          # Associate some events with methods of this class
          self.Bind(wx.EVT_MOVE, self.OnMove)
  
          # Add a panel and some controls to display the size and position
          panel = wx.Panel(self, -1)
          label1 = wx.StaticText(panel, -1, "WebSocket messages received:")
          label2 = wx.StaticText(panel, -1, "Window position:")
          self.sizeCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
          self.posCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
          self.panel = panel
  
          # Use some sizers for layout of the widgets
          sizer = wx.FlexGridSizer(2, 2, 5, 5)
          sizer.Add(label1)
          sizer.Add(self.sizeCtrl)
          sizer.Add(label2)
          sizer.Add(self.posCtrl)
          border = wx.BoxSizer()
          border.Add(sizer, 0, wx.ALL, 15)
          panel.SetSizerAndFit(border)
          self.Fit()
  
      # This method is called by the System when the window is moved,
      # because of the association above.
      def OnMove(self, event):
          pos = event.GetPosition()
          self.posCtrl.SetValue("%s, %s" % (pos.x, pos.y))
  
          if self._app._factory:
              proto = self._app._factory._proto
              if proto:
                  evt = {'x': pos.x, 'y': pos.y}
                  msg = json.dumps(evt).encode('utf8')
                  proto.sendMessage(msg)
  
  
  class MyClientProtocol(WebSocketClientProtocol):
  
      """
      Our protocol for WebSocket client connections.
      """
  
      def onOpen(self):
          print("WebSocket connection open.")
  
          # the WebSocket connection is open. we store ourselves on the
          # factory object, so that we can access this protocol instance
          # from wxPython, e.g. to use sendMessage() for sending WS msgs
          ##
          self.factory._proto = self
          self._received = 0
  
      def onMessage(self, payload, isBinary):
          # a WebSocket message was received. now interpret it, possibly
          # accessing the wxPython app `self.factory._app` or our
          # single UI frame `self.factory._app._frame`
          ##
          if isBinary:
              print("Binary message received: {0} bytes".format(len(payload)))
          else:
              print("Text message received: {0}".format(payload.decode('utf8')))
  
          self._received += 1
          frame = self.factory._app._frame
          frame.sizeCtrl.SetValue("{}".format(self._received))
  
      def onClose(self, wasClean, code, reason):
          print("WebSocket connection closed: {0}".format(reason))
  
          # the WebSocket connection is gone. clear the reference to ourselves
          # on the factory object. when accessing this protocol instance from
          # wxPython, always check if the ref is None. only use it when it's
          # not None (which means, we are actually connected)
          ##
          self.factory._proto = None
  
  
  class MyClientFactory(WebSocketClientFactory):
  
      """
      Our factory for WebSocket client connections.
      """
      protocol = MyClientProtocol
  
      def __init__(self, url, app):
          WebSocketClientFactory.__init__(self, url)
          self._app = app
          self._proto = None
  
  
  if __name__ == '__main__':
  
      import sys
  
      from twisted.internet import wxreactor
      wxreactor.install()
      from twisted.internet import reactor
  
      from twisted.python import log
  
      log.startLogging(sys.stdout)
  
      app = wx.App(False)
      app._factory = None
  
      app._frame = MyFrame(app)
      app._frame.Show()
      reactor.registerWxApp(app)
  
      app._factory = MyClientFactory(u"ws://127.0.0.1:9000", app)
  
      reactor.connectTCP("127.0.0.1", 9000, app._factory)
  
      reactor.run()
  