[PyQt] Embedded PyQt send signal to Qt

zhang jian zhangmdev at gmail.com
Fri Jul 22 16:08:51 BST 2011

I can retrieve the PyQt widget via Python C API, but it is a PyObject*, so
how to convert PyObject* to a QObject* ? Once I have the QObject*, the rest
should be easy in C++.


On Fri, Jul 22, 2011 at 5:21 PM, Phil Thompson
<phil at riverbankcomputing.com>wrote:

> On Tue, 19 Jul 2011 04:26:52 +0800, zhang jian <zhangmdev at gmail.com>
> wrote:
> > Hi,
> >
> > I have a question about embedded PyQt inside a Qt (C++) app. For now I
> have
> > 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
> Widget.
> > I can call stuff in PyQt from Qt using PyObject_CallMethod(), but I
> don't
> > 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
> to
> > 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++.
> Phil
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