Re: determine the the type of an object

[Horváth Imre <blemidon kabelnet hu>]

Hi,

Yes, you can not connect a virtual function :(
I've tried this before...

Thanx:

Imre Horvath

2006. 12. 22, p�ek keltez�el 14.06-kor Pavlo Korzhyk ezt �a:
> > So the toolbar reconnect function gets a Gtk::Widget (the active tab),
> > and i need to know the class of this widget:
> >
> > // connect the toolbuttons to the widget
> > void RecordToolbar::reconnect(Gtk::Widget *aWidget)
> > {
> > toolbutton_first.signal_clicked().connect( sigc::mem_fun(*aWidget,
> > &[HERE I NEED THE CLASS OF THE WIDGET]::on_record_first) );
> > }
> > Do you now can I solve this problem?
> In theory you may create a second base class for your tabs. Your code
> will be something like:
> 
> class AbstractTab{
> public:
>   virtual void on_toolbar1()=0;
>   virtual void on_toolbar2()=0;
>   ...
> };
> 
> 
> class MyPageWidget : public Gtk::Widget , public AbstractTab{
> public:
>   virtual void on_toolbar1();
>   virtual void on_toolbar2();
>   ...
> };
> 
> void MyPageWidget::on_toolbar1()
> {
>    //write here the custom code of your tab
> }
> 
> 
> and ALLWAYS reconnect with
> 
> toolbutton_first.signal_clicked().connect( sigc::mem_fun(*aWidget,
>    &AbstractTab::on_record_first) );
> 
> Each time the signal with different "this" but same function address
> will be reconnected.
> 
> I never used virtual functions with sigc, so I could be missing
> something obvious.
> Anyway hope this post will be of some use :)
> 
> BTW don't forget to disconnect all other signals before/after a new handler.
>