[Pythoncard-cvs] PythonCard/samples/twistedEchoClient .cvsignore,NONE,1.1 readme.txt,NONE,1.1 twistedEchoClient.py,NONE,1.1 twistedEchoClient.rsrc.py,NONE,1.1

[Kevin A. <ka...@us...>]

Update of /cvsroot/pythoncard/PythonCard/samples/twistedEchoClient
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv17350/samples/twistedEchoClient

Added Files:
	.cvsignore readme.txt twistedEchoClient.py 
	twistedEchoClient.rsrc.py 
Log Message:
added TwistedApplication subclass for writing Twisted GUI apps
added twistedEchoClient sample


--- NEW FILE: twistedEchoClient.rsrc.py ---
{'stack':{'type':'Stack',
          'name':'Dialogs',
    'backgrounds': [
    {'type':'Background',
          'name':'bg1',
          'title':'Twisted PythonCard PB Echo Client',
          'size':(375, 270),
          'statusBar':1,

        'menubar': {'type':'MenuBar',
         'menus': [
             {'type':'Menu',
             'name':'File',
             'label':'&File',
             'items': [
                  {'type':'MenuItem',
                   'name':'menuFileExit',
                   'label':'E&xit\tAlt+X',
                   'command':'exit',
                  },
              ]
             },
         ]
     },
         'components': [

{'type':'StaticText', 
    'name':'StatusStaticText', 
    'position':(284, 215), 
    'backgroundColor':(0, 255, 127), 
    'font':{'family': 'sansSerif', 'size': 10}, 
    'text':'CONNECTED', 
    'visible':0, 
    },

{'type':'Button', 
    'name':'buttonLogin', 
    'position':(22, 140), 
    'size':(117, 26), 
    'label':'Login', 
    },

{'type':'TextField', 
    'name':'SendTextField', 
    'position':(20, 180), 
    'size':(330, -1), 
    'alignment':'left', 
    },

{'type':'TextArea', 
    'name':'ReceivedTextArea', 
    'position':(20, 0), 
    'size':(330, 125), 
    'alignment':'left', 
    },

{'type':'Button', 
    'name':'buttonSend', 
    'position':(151, 140), 
    'size':(125, 25), 
    'label':'Send', 
    },

] # end components
} # end background
] # end backgrounds
} }

--- NEW FILE: .cvsignore ---
.cvsignore
*.pyc
*.log
.DS_Store

--- NEW FILE: twistedEchoClient.py ---
"""
Twisted PythonCard PbEchoClient
"""

from PythonCard import model, twistedModel
from twisted.cred.credentials import UsernamePassword
from twisted.spread import pb
from twisted.internet import reactor

class DefinedError(pb.Error):
    pass

class EchoClient(model.Background):
    """
    TPC PB Echo GUI Panel
    """
    
    def on_initialize(self, event):
        self.pbfactory = pb.PBClientFactory()
        # KEA the Send button and SendTextField should be disabled
        # until a successful login
        self.components.SendTextField.enabled = False
        self.components.buttonSend.enabled = False

    def on_SendTextField_keyPress(self, event):
        # if user presses return, send text
        if event.keyCode == 13:
            self.sendAndClearText()
        else:
            event.skip()

    # KEA 2004-04-27
    # this should popup a custom dialog
    # to prompt the user for the host, port number,
    # username, and password
    # with defaults of "localhost", pb.portno
    # "guest", and "guest"
    # this dialog is going to be pretty common so we'll stick
    # in PythonCard/templates/dialogs to simplify usage from
    # other twisted apps
    def on_buttonLogin_mouseClick(self, event):
        reactor.connectTCP("localhost", pb.portno, self.pbfactory)
        self.pbfactory.login(
            UsernamePassword("guest", "guest")
                ).addCallbacks(self.loginsuccess,
                               self.loginfailure)

    def loginsuccess(self, perspective):
        self.statusBar.text = 'Connected'
        self.components.SendTextField.enabled = True
        self.components.buttonSend.enabled = True
        self.components.SendTextField.setFocus()
        self.perspective = perspective

    def loginfailure(self, error):
        self.displaycontent("Error on login: %s" % error)

    def sendAndClearText(self):
        fld = self.components.SendTextField
        self.perspective.callRemote('echo', fld.text
            ).addCallbacks(self.echosuccess,
                           self.echofailure)
        fld.text = ""

    def on_buttonSend_mouseClick(self, event):
        self.sendAndClearText()

    def echosuccess(self, message):
        self.displaycontent(message)

    def echofailure(self, error):
        t = error.trap(DefinedError)
        self.displaycontent("error received"+t)

    def displaycontent(self, text):
        self.components.ReceivedTextArea.appendText(text + "\n")


if __name__ == '__main__':
    app = twistedModel.TwistedApplication(EchoClient)
    app.MainLoop()


--- NEW FILE: readme.txt ---
Twisted Echo client which uses the TwistedApplication class.

class TwistedApplication(model.Application):
    def OnInit(self):
        model.Application.OnInit(self)
        reactor.startRunning()
        wx.EVT_TIMER(self, 999999, self.OnTimer)
        self.twistedTimer = wx.Timer(self, 999999)
        self.twistedTimer.Start(250, False)
        return True

    def OnTimer(self, event):
        reactor.runUntilCurrent()
        reactor.doIteration(0)

    def OnExit(self):
        # need to stop the timer for cleanup purposes
        self.twistedTimer.Stop()
        self.twistedTimer = None
        reactor.stop()


You need to start pbecho.py first so you have a server to connect to. pbecho.py is included in the Twisted distribution within your Python site-packages directory:

    site-packages/TwistedDocs/examples/pbecho.py

Contributed by Stephen Waterbury. Additional code by Kevin Altis

Adapted from Uwe C. Schroeder's cookbook entry "Using wxPython with Twisted Python"

    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/181780