{{{
#!python
from wxPython.wx import *
from wxPython.lib.layoutf import Layoutf
from telnetlib import Telnet # core module

#---------------------------------------------------------------------------

class UpdateTimer(wxTimer):
    def __init__(self, target, dur=1000):
        wxTimer.__init__(self)
        self.target = target
        self.Start(dur)

    def Notify(self):
        """Called every timer interval"""
        if self.target:
            self.target.OnUpdate()

#---------------------------------------------------------------------------
class TelnetFrame(wxFrame):
    def __init__(self, parent, ID, host):
        wxFrame.__init__(self, parent, ID, "Telnet - " + host)
        self.SetAutoLayout(true)
        font = wxFont(8, wxMODERN, wxNORMAL, wxNORMAL, faceName="Lucida Console")

        commandId = wxNewId()
        self.command = wxTextCtrl(self, commandId, "[command]",
                                  wxPyDefaultPosition, wxPyDefaultSize,
                                  wxTE_PROCESS_ENTER)
        self.command.SetConstraints(Layoutf('t=t2#1;r=r2#1;b!32;l=l2#1', (self,)))
        self.command.SetFont(font)
        EVT_TEXT_ENTER(self, commandId, self.OnEnter)

        # Select the text so that it's automatically typed over.
        self.command.SetSelection(0, self.command.GetLastPosition()) 


        self.output = wxTextCtrl(self, -1, "",
                                 wxPyDefaultPosition, wxPyDefaultSize,
                                 wxTE_MULTILINE|wxTE_READONLY)
        self.output.SetConstraints(Layoutf('t_2#2;r=r2#1;b=b2#1;l=l2#1', (self,self.command)))
        self.output.SetFont(font)

        EVT_CLOSE(self, self.OnCloseWindow)

        self.tn = Telnet(host) # connect to host
        self.timer = UpdateTimer(self, 200) # update five times a second

    def OnUpdate(self):
        """Output what's in the telnet buffer"""
        try:
            newtext = self.tn.read_very_eager()
            if newtext:
                lines = newtext.split('\n') # This keeps it from printing out extra blank lines.
                for line in lines:
                    self.output.AppendText(line)
        except EOFError:
            self.tn.close()
            self.timer.Stop()
            self.output.AppendText("Disconnected by remote host")
        
    def OnEnter(self, e):
        """The user has entered a command.  Send it!"""
        self.tn.write(e.GetString() + "\r\n")
        self.command.SetSelection(0, self.command.GetLastPosition()) 
        
    def OnCloseWindow(self, event):
        """We're closing, so clean up."""
        self.timer.Stop()
        self.Destroy()

#---------------------------------------------------------------------------

if __name__ == '__main__':
    import sys
    app = wxPySimpleApp()
    frame = TelnetFrame(None, -1, sys.argv[1])
    frame.Show(true)
    app.MainLoop()
}}}