Re: [GtkD] How to connect to notify::active signal?

[Geert via Digitalmars-d-learn]

On Saturday, 4 May 2013 at 09:59:12 UTC, Mike Wey wrote:
On 05/04/2013 05:20 AM, Alexandr Druzhinin wrote:
04.05.2013 1:18, Mike Wey пишет:
On 05/03/2013 06:30 PM, Alexandr Druzhinin wrote:
I need to connect to "notify::active" signal for Switch 
widget to
process changing of its state. The guides say I shouldn't 
use onActivate
signal, but "notify:active". But I didn't find a way to do 
it. Can
somebody help with it?

Are you referring to gtk.Switch ?

yes, gtk.Switch
if I connect to activate signal by means addOnActivate nothing 
works.
Documentation says I should use "notify::active" event (it 
belongs to
ObjectG, as I understand?), but I cannot find a way to connect 
to this
signal by means of GtkD.

You can use addOnNotify it currently doesn't allow you to 
specify the property for witch you want to receive the signal 
(it probably should).

For now you could do:

Switch sw = new Switch();
sw.addOnNotify(&notify);

void notify(ParamSpec param, ObjectG obj)
{
        if(param.getName() == "active")
        {
                //Do stuff
        }
}



Hi!

I would like to share a small example of this:



module gtkd_switch;
// Compile: ldc -w  main.d  `pkg-config --cflags --libs gtkd-3`

import std.stdio;
import gtk.Builder;
import gtk.Main, gtk.Window, gtk.Switch, gtk.Widget;
import gobject.ObjectG ,gobject.ParamSpec;


void on_swt_change(ParamSpec param, ObjectG obj, Switch 
*obj_switch){
    bool state = obj_switch.getActive();
    writefln("Changed! %b", state);
}

void main(string[] args) {
    Main.init(args);

    Builder g = new Builder();
    g.addFromFile("vista.glade");

    // Widgets from glade file "vista.glade":
    Window w = cast(Window)g.getObject("window1");
    w.setDefaultSize(320, 80);
    w.setTitle("Gtkd Switch addOnNotify");
    Switch swt = cast(Switch)g.getObject("swt_test");

    // Actions:
    w.addOnHide( delegate void(Widget aux){ Main.quit(); } );
    swt.addOnNotify(delegate void (ParamSpec, 
ObjectG){on_swt_change(ParamSpec, ObjectG, &swt);}, "active");

    w.showAll();
    Main.run();
}