[PyQt] Embedded PyQt send signal to Qt

Phil Thompson phil at riverbankcomputing.com
Fri Jul 22 10:21:36 BST 2011

On Tue, 19 Jul 2011 04:26:52 +0800, zhang jian <zhangmdev at gmail.com>
> Hi,
> I have a question about embedded PyQt inside a Qt (C++) app. For now I
> an app totally written in PyQt, then I want to embed it inside a Qt app
> written in C++. I have no problem putting PyQt ui stuff inside a Qt
> I can call stuff in PyQt from Qt using PyObject_CallMethod(), but I
> know how to send signal from PyQt to Qt. I already have the PyObject* of
> the
> PyQt widget when I create the instance by PyObject_CallObject(). I try
> connect((QObject*)some_instance, SIGNAL("some_signal"), this,
> SLOT(some_slot)), but no luck. I'd like to know if that is possible to
> connect a signal in PyQt to a slot in Qt? If it is, how?

Assuming you are doing the connection from C++, and assuming that the
signal is defined in Python using @pyqtSignal, then once you have a pointer
to the underlying C++ QObject then just use the normal QObject::connect()
call. Pass whatever you defined the signal to be using @pyqtSignal to your
SIGNAL() call in C++.


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