== Automatically Connecting Slots by Name ==

The code in attachment to replace connectSlotsByName() has been
working great for me.  I'm replacing more and more QObject.connect()
-like code with it (I could not use the connectSlotsByName() from Qt
because it binds callbacks twice (and yes, even if I did decorate my
callbacks) and most importantly because my callbacks are not on the
same object.  --MartinBlais

{{{
#!python

def connectSlotsByName(container, callobj):
    """
    A version of connectSlotsByName() that uses a potentially different object
    to search for widget instances and to search for callbacks.  This is more
    flexible than the version that is provided with Qt because it allows you to
    bind to callbacks on any object, not just on the widget container class
    itself.  You can also call this with a number of combinations of container
    and callback objects.

    * 'container': an instance whose attributes will be inspected to find
      Qt widgets.

    * 'callobj': an object which will be inspect for appropriately named methods
      to be used as callbacks for widgets on 'container'.

    See QtCore.QMetaObject.connectSlotsByName() for some background info.
    """
    logging.debug('connectSlotsByName  container=%s  callobj=%s' % (container, callobj))

    for name in dir(callobj):
        cb = getattr(callobj, name)
        if not callable(cb):
            continue

        mo = re.match('on_(.+)_([^_]+)$', name)
        if not mo:
            continue

        nwidget, nsignal = mo.groups()
        try:
            widget = getattr(container, nwidget)
        except AttributeError:
            logging.debug("  Widget '%s' not found; method '%s' will not be bound." %
                          (nwidget, name))
            continue

        # Support the QtCore.pyqtSignature decorator.
        signature = '%s(%s)' % (nsignal, getattr(cb, '_signature', ''))

        logging.debug('  Connecting: %s to %s: %s' % (widget, signature, cb))
        QObject.connect(widget, SIGNAL(signature), cb)

}}}