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

[Ed Sutton]

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
> >
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