Re: [gtkmm] Variable maps and spin buttons

[Martin Schulze <martin-ml hippogriff de>]

Am 27.08.2004 23:44:38 schrieb(en) Alberto Paro:
> Robert Zeh Wrote:
> > Has anyone thought of extending the Glade::VariablesMap class to
> handle
> > associations between integers and GtkSpinButtons?
> >
> Today I've extended Glade::VariablesMap, now it handles:
> * Entry,
> * ComboTextEntry,
> * SpinButton,
> * *Scale,
> * Calendar
> * CheckBox
>
> Tomorrow I'll post the patch on bugzilla.
>
> -----------------
> Now I'm managing to connect slot to a widget.
>
> for example:
>
>   /** This connect a glade button to a slot
>    *
>    * For instance:
>    * @code
>    * refXml->connect_button("button", sigc::mem_fun(*this,
> &ExampleWindow::on_button_clicked) );
>    * @endcode
>    *
>    * @param name The name of the widget.
>    * @param pslot The slot to connect to.
>    */
>   void connect_button(const Glib::ustring& name, const
> sigc::slot<void,const Gtk::Widget>& slot_);
>
>
> But I'm studying sigc because I have not understand how to pass a
> mem_fun to a function.

You will want to use 'const sigc::slot<[signature]>&' as argument type. 
The problem is that '[signature]' is not known i.e. 'connect_button'  
must be a template function. Also, the function needs eight overloads  
to cover 0 to 7 template arguments. Note that you won't be able to  
create a type-safe implementation, i.e. passing a wrong slot type won't  
result in an error at compile time but the executable will probably  
segfault.

Regards,

 Martin