Re: [Vala] widgets emitting signals

[Jürg Billeter <j bitron ch>]

Hi Karl,

On Sat, 2008-11-22 at 12:54 +0000, Karl Lattimer wrote:
> I'm working on a GTK Widget in vala and was wondering if anyone can
> point me somewhere or give me a hint as to how I emit signals in vala.
>
> For instance, some event occurs inside of my widget as a result of a
> user event or a timed interlude and the widget emits a signal which can
> be caught and dealt with.
>
> In one example I want to emit a "selection-changed" signal after
> responding to a button-release event. This doesn't seem to be in the
> custom widget example code here
> http://live.gnome.org/Vala/GTKSample#head-88a57e061a4cc9b5cbe5c5c2f7a41cb78f6cccd2 but probably should be 
> there as it is an important part of writing custom widgets.

public class Foo : Object {
        // declare signal, if not inherited from base class
        public signal void selection_changed ();

        public void bar () {
                // emit signal
                this.selection_changed ();
        }
}

Jürg