[Qt-interest] How associate slot sender with my data object?

[Ed Sutton]

> In your initial mail you asked whether it's possible to know the sender's
> checked state from within a slot. Well, QObject::sender() tells you the
> QObject that emitted the signal, so you could qobject_cast<> that to a
> QRadioButton and check its state, and do whatever else you want to know
> about the sender.

I had this part.  Probably made my question too wordy.

> But I might as well be misunderstanding your use-case right here :-)

The key to the question is how can I also associate the sender with an instance of MyObject?  

Must I make an external stl map collection or is there a more "QT" like way?

-Ed

> 
> But I might as well be misunderstanding your use-case right here :-)
> 
> /Thomas
> 
> Am 20.06.2009, 18:14 Uhr, schrieb Ed Sutton <ESutton at fescorp.com>:
> 
> > Thank you for your help.  ( I apologize for accidentally replying
> > directly )
> >
> >> I take it you are looking for QObject::sender()
> >> (http://doc.trolltech.com/4.5/qobject.html#sender) ?
> >
> > I am not sure I understand.
> >
> > I can get the sender if I use the SLOT(channelChanged(QWidget*))
> > signature.  How can QObject::sender() be used to associated the sender
> > with my data object?
> >
> > Forgive for being slow.
> >
> > -Ed
> >
> >> > I am getting started using signals and slots. I use QSignalMapper with
> >> > QGroupBox collection of QRadioButtons that select video channels.
> >> >
> >> > In the received slot, how can I both retrieve the sender's checked
> >> state
> >> > and associate the sender with it's related channel data object?  Do QT
> >> > widgets support a pointer to a void* "tag object"?  Some way to
> >> > associate my data object with the signal sender?  I tried to make my
> >> own
> >> > but cannot seem to derive from QRadioButton.
> >> >
> >> > In order to determine the QRadioButton checked state in the slot, the
> >> > best choice seems to use the SLOT(channelChanged(QWidget*)) signature.
> >> > In order to associate the sender with my data object, must I make my
> >> own
> >> > associative map collection?  Is this typical or is there a better
> >> > approach?
> >> >
> >> > Thanks in advance for sharing your experience,
> >> >
> >> > -Ed
> >> >
> >> > _______________________________________________
> >> > Qt-interest mailing list
> >> > Qt-interest at trolltech.com
> >> > http://lists.trolltech.com/mailman/listinfo/qt-interest
> >>
> >
> >
> > _______________________________________________
> > Qt-interest mailing list
> > Qt-interest at trolltech.com
> > http://lists.trolltech.com/mailman/listinfo/qt-interest
>