root / trunk / twisted / internet / tksupport.py

# Copyright (c) 2001-2004 Twisted Matrix Laboratories.
# See LICENSE for details.


"""
This module integrates Tkinter with twisted.internet's mainloop.

Maintainer: Itamar Shtull-Trauring

To use, do::

    | tksupport.install(rootWidget)

and then run your reactor as usual - do *not* call Tk's mainloop(),
use Twisted's regular mechanism for running the event loop.

Likewise, to stop your program you will need to stop Twisted's
event loop. For example, if you want closing your root widget to
stop Twisted::

    | root.protocol('WM_DELETE_WINDOW', reactor.stop)

"""

# system imports
import Tkinter, tkSimpleDialog, tkMessageBox

# twisted imports
from twisted.python import log
from twisted.internet import task


_task = None

def install(widget, ms=10, reactor=None):
    """Install a Tkinter.Tk() object into the reactor."""
    installTkFunctions()
    global _task
    _task = task.LoopingCall(widget.update)
    _task.start(ms / 1000.0, False)

def uninstall():
    """Remove the root Tk widget from the reactor.

    Call this before destroy()ing the root widget.
    """
    global _task
    _task.stop()
    _task = None


def installTkFunctions():
    import twisted.python.util
    twisted.python.util.getPassword = getPassword


def getPassword(prompt = '', confirm = 0):
    while 1:
        try1 = tkSimpleDialog.askstring('Password Dialog', prompt, show='*')
        if not confirm:
            return try1
        try2 = tkSimpleDialog.askstring('Password Dialog', 'Confirm Password', show='*')
        if try1 == try2:
            return try1
        else:
            tkMessageBox.showerror('Password Mismatch', 'Passwords did not match, starting over')

__all__ = ["install", "uninstall"]