//A window in the application

public class Window : Gtk.ApplicationWindow {

	public Window (Application app) {

		Object (application: app, title: "Gtk.MessageDialog Example");

		var label = new Gtk.Label ("This application goes boom!");

		this.add (label);

		var message_action = new SimpleAction ("message", null);

		message_action.activate.connect (message);

		this.add_action (message_action);

		this.set_default_size (400, 200);

		this.show_all ();

	}

	void dialog_response (Gtk.Dialog dialog, int response_id) {

		switch (response_id) {

			case Gtk.ResponseType.OK:

				print ("*boom*\n");

				break;

			case Gtk.ResponseType.CANCEL:

				print ("good choice\n");

				break;

			case Gtk.ResponseType.DELETE_EVENT:

				print ("dialog closed or cancelled\n");

				break;

		}

			dialog.destroy();

	}

	void message (SimpleAction simple, Variant? parameter) {

		var messagedialog = new Gtk.MessageDialog (this,

                            Gtk.DialogFlags.MODAL,

                            Gtk.MessageType.WARNING,

                            Gtk.ButtonsType.OK_CANCEL,

                            "This action will cause the universe to stop existing.");

		messagedialog.response.connect (dialog_response);

		messagedialog.show ();

	}

}

//This is the Application

public class Application : Gtk.Application {

	protected override void activate () {

		new Window (this);

	}

	protected override void startup () {

		base.startup ();

		var menu = new Menu ();

		menu.append ("Message", "win.message");

		menu.append ("Quit", "app.quit");

		this.app_menu = menu;

		var quit_action = new SimpleAction ("quit", null);

		//quit_action.activate.connect (this.quit);

		this.add_action (quit_action);

	}

	public Application () {

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

	}

}

//main function creates Application and runs it

int main (string[] args) {

	return new Application ().run (args);

}