• SignalDecorator

In Python 2.4, the signal decorator provides a convenient way of defining the signature of a a slot method or function.

{{{from qt import *

def qt_signal_signature(signature):

• split_pos = signature.find('(') signal_name, args = signature[:split_pos], signature[split_pos:] def set_slot_sig(method):
  • method.slot_signature = signature method.signal_name = signal_name function = getattr(method, 'im_func', method) method.signal = SIGNAL(signal_name+args) method.slot = SLOT(function.func_name+args) return method
  return set_slot_sig

}}}

The usage is as follows:

{{{class SignalHandler(object):

• def init(self):

  • f = self._widget_pressed QObject.connect(SOME_WIDGET, f.signal, f)

  @qt_signal_signature("pressed(QIconViewItem*, const QPoint&)") def _widget_pressed(self, other_item, position):

  • # do something here ...

}}}

Currently, there is no support in PyQT that could ask for "f.signal" itself, but it would be easy to integrate that into the connect method. It could accept two arguments, a QObject and a method or function and then check if the function carries a "signal" or "slot" attribute. Since current code does not use this signature, this change should not break anything.