[Glade-users] signal handler with arguments from property editor

[tristan.van.berkom at gmail.com (Tristan Van Berkom)]

mw158979 wrote:

> > I have built a gtk keypad with Glade and I wish to assign the same
> > "pressed" signal handler to every key button and to give an additional
> > argument to the signal callback, specifying for each key button a
> > different key identifier. Is it possible to do this from the property
> > editor? Thanks in advance for any help.
> >    
 From what I'm seeing, unfortunately that not currently possible.

> You can fill the field 'object'.
>
> Glade then generates code with that text as gpointer type
> argument for g_signal_connect, perhaps you will need
> to place conversion in the editor. I don't know how about
> libglade.
>
> That argument you will receive in your callback (as user_data).
>  
Well, I'm not exactly sure about the code that glade-2
generates, but libglade uses that feild to lookup a widget
by that name and connect the object as user_data.

I assume the code glade-2 would generate would look like:
    g_signal_connect (button, "clicked", my_hanlder, lookup_widget 
("my_object"));
where you put "my_object" in the "object" field.

Either way, if you are useing code generation, you can modify the
generated code and use a string constant for user data, if
your not generating code; you'll have to find another way.

That other way could be:

void
my_clicked_handler (GtkWidget *button, gpointer unused)
{
    gchar *key, *name;

    name = gtk_widget_get_name (button);
    key = derive_key_from_widget_name ();

    /* keyboard code */
}

Cheers,
                                   -Tristan