Thanks for the link Justin. I don't quite understand what C++ signature does but I'll leave it at that :D
That page does bring up another topic I've always wonder about. It shows sample of sub classing QComboBox and over ride signal emitters in the handle_int and handle_string method. How can I find out more about methods available in each widget so I can over ride it in my own class? The code included with PyQt installation seems to be in binary. On Sun, Mar 3, 2013 at 3:24 PM, Justin Israel <[email protected]>wrote: > Pyqt4 let's you use any python callable as a slot. The decorator actually > defines a c++ signature for it as a registered slot > > > http://pythonxy.googlecode.com/hg-history/4ef4255f59b092a123a5788c821434d9fe94aee9/src/python/PyQt4/PLATLIB/PyQt4/doc/html/new_style_signals_slots.html#the-pyqtslot-decorator > > " Although PyQt allows any Python callable to be used as a slot when > connecting signals, it is sometimes necessary to explicitly mark a Python > method as being a Qt slot and to provide a C++ signature for it." > ... > " Connecting a signal to a decorated Python method also has the advantage > of reducing the amount of memory used and is slightly faster." > On Mar 3, 2013 9:06 PM, "Panupat Chongstitwattana" <[email protected]> > wrote: > >> Hi. >> >> I'm experimenting with some code and I'm curious what the >> @QtCore.pyqtSlot() decoration does? >> I saw it from some other codes, but even without it, testdef() still >> returns the widget's name correctly. >> >> >> from PyQt4 import QtGui, QtCore >> >> >> class cb(QtGui.QComboBox): >> >> def __init__(self): >> >> super(cb, self).__init__() >> >> self.setObjectName("test name") >> >> self.currentIndexChanged.connect(self.testdef) >> >> for i in range(5): >> >> self.addItem(str(i)) >> >> >> @QtCore.pyqtSlot() >> >> def testdef(obj): >> >> print str(obj.sender().objectName()) >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Python Programming for Autodesk Maya" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > -- > You received this message because you are subscribed to the Google Groups > "Python Programming for Autodesk Maya" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
