Re: Binding run-time data

[Armin Burgmeier <armin arbur net>]

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Germán Diago wrote:
> Hello. I'm using gtkmm to make a little program.
> 
> The program has some entries and a button.
> 
> When the button is clicked, I'd like to get the data inside the entries.
> 
> So I'd like my on_button_clicked slot to be like this:
> 
> void on_button_clicked(int data1, int data2);
> 
> If I use bind, the data is bound at compile-time, so I can't. I don't want
> to use Gtk::Entry * as  arguments, because I want the slots to be
> independent of the gui toolkit.
> Any help here? Thanks.

You can use sigc::compose() which is like sigc::bind() but takes a
functor to call instead of static data. It would look like this
(assuming your entries are actually SpinButtons because your
on_button_clicked function takes integers as arguments):

button.signal_clicked().connect(
    sigc::compose(
        sigc::ptr_fun(&on_button_clicked),
        sigc::mem_fun(entry1, &Gtk::SpinButton::get_value_as_int),
        sigc::mem_fun(entry2, &Gtk::SpinButton::get_value_as_int)
    )
);

Greetings,
Armin
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