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

[Thomas Dähling]

I take it you are looking for QObject::sender()  
(http://doc.trolltech.com/4.5/qobject.html#sender) ?

Am 20.06.2009, 17:47 Uhr, schrieb Ed Sutton <ESutton at fescorp.com>:

> 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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