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"""
Twisted PythonCard PbEchoClient
"""
from PythonCard import model, twistedModel
from twisted.cred.credentials import UsernamePassword
from twisted.spread import pb
from twisted.internet import reactor
from PythonCard.templates.dialogs.loginDialog import loginDialog
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):
result = loginDialog(self, port=pb.portno)
if result.accepted:
# verify input here?
host = result.host
port = result.port
username = result.username
password = result.password
reactor.connectTCP(host, port, self.pbfactory)
self.pbfactory.login(
UsernamePassword(username, password)
).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()
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