[PyQt] QMetaObject::Connection equivalent

[Phil Thompson]

On 2 Mar 2016, at 3:09 pm, Florian Bruhin <me at the-compiler.org> wrote:
> 
> Hi,
> 
> I just noticed Qt5 returns a QMetaObject::Connection object when using
> QObject::connect:
> 
> http://doc.qt.io/qt-5/qobject.html#connect-2
> http://doc.qt.io/qt-5/qmetaobject-connection.html
> 
> You can then use that with the appropriate QObject::disconnect method
> to disconnect e.g. lambdas easily again:
> 
> http://doc.qt.io/qt-5/qobject.html#disconnect-4
> 
> I'm missing something like that in Python - it'd be nice to be able to
> do something like this:
> 
>    w = QTextEdit()
>    connection = w.textChanged.connect(lambda text: None)
>    # [...]
>    w.textChanged.disconnect(connection)
> 
> 'connection' then would be some pyqtSignalConnection object which
> pyqtSignal.disconnect understands.
> 
> Alternatively (or in addition to the above), disconnect could be a
> method of pyqtSignalConnection:
> 
>    w = QTextEdit()
>    connection = w.textChanged.connect(lambda text: None)
>    # [...]
>    connection.disconnect()
> 
> This would make it easier to work with Python lambda's and
> pyqtSignals.
> 
> What do you think?

I don't know I've had a blind spot about this...

QMetaObject.Connection is now wrapped, is returned by connect() and can be passed to disconnect().

...in tonight's snapshot.

Phil