/* A window in the application */

class MyWindow : Gtk.ApplicationWindow {

	/* The constructor */

	internal MyWindow (MyApplication app) {

		Object (application: app, title: "CheckButton Example");

		this.set_default_size (300, 100);

		this.border_width = 10;

		var checkbutton = new Gtk.CheckButton.with_label ("Show Title");

		/* Connect the checkbutton to the

		 * callback function (aka. signal handler).

		 */

		checkbutton.toggled.connect (this.toggled_cb);

		/* Add the button to the this window */

		this.add (checkbutton);

		checkbutton.set_active (true);

		checkbutton.show ();

	}

	/* The signal handler for the 'toggled' signal of the checkbutton. */

	void toggled_cb (Gtk.ToggleButton checkbutton) {

		if (checkbutton.get_active())

			this.set_title ("CheckButton Example");

		else

			this.set_title ("");

	}

}

/* This is the application */

class MyApplication : Gtk.Application {

	/* The constructor */

	internal MyApplication () {

		Object (application_id: "org.example.checkbutton");

	}

	/* Override the activate signal of GLib.Application */

	protected override void activate () {

		new MyWindow (this).show ();

	}

}

/* main creates and runs the application */

int main (string[] args) {

	return new MyApplication ().run (args);

}