from wxPython.wx import *
    
class GroupChat(wxPanel):
    '''
    wxPython UI panel for sending and receiving text.
    '''
    def __init__(self, parent, id):
        '''
        Initiate the panel.
        '''
        wxPanel.__init__(self, parent, id)
        self.Populate()
        
    def Populate(self):
        '''
        Create all UI components.
        '''
        sizer = wxBoxSizer(wxVERTICAL)

        self.textOutput = wxTextCtrl(self, -1,
                                     style = wxTE_MULTILINE)

        sizer2 = wxBoxSizer(wxHORIZONTAL)
        self.textInput = wxTextCtrl(self, -1)
        sendButton = wxButton(self, wxNewId(), "Send")
        sizer2.Add(self.textInput, 1, wxRIGHT, 5)
        sizer2.Add(sendButton, 0)

        sizer.Add(self.textOutput, 1, wxEXPAND | wxALL, 5)
        sizer.Add(sizer2, 0, wxEXPAND | wxALL, 5)
        
        self.SetSizer(sizer)
        self.SetAutoLayout(1)
        self.Layout()

        EVT_BUTTON(self, sendButton.GetId(), self.OnSend)

    def OnSend(self, event):
        '''
        Event handler for the send button.
        '''
        text = self.textInput.GetValue()
        self.textOutput.WriteText(text+"\n")
        self.textInput.Clear()
     
                
if __name__ == "__main__":
    
    # Create the wxPython application
    wxapp = wxPySimpleApp()
    wxInitAllImageHandlers()

    # Create the main frame
    frame = wxFrame(None, -1, "Group Chat")

    # Create the group chat panel
    chat = GroupChat(frame, -1)
    frame.Show()

    # Start the UI main thread
    wxapp.MainLoop()