/* This is the Window */

class MyWindow : Gtk.ApplicationWindow {

	/* Declare these two ToolButtons, as we will get them

	 * from the ui file (see lines 32 and 33), so we can

	 * hide() and show() them as needed.*/

	Gtk.ToolButton fullscreen_button;

	Gtk.ToolButton leave_fullscreen_button;

	/* Constructor */

	internal MyWindow (MyApplication app) {

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

		this.set_default_size (400, 200);

		var grid = new Gtk.Grid ();

		this.add (grid);

		grid.show ();

		/* add the toolbar from the ui file */

		var builder = new Gtk.Builder ();

		try {

			builder.add_from_file ("toolbar_builder.ui");

		}

		/* Handle the exception */

		catch (Error e) {

			error ("Unable to load file: %s", e.message);

		}

		grid.attach (builder.get_object ("toolbar") as Gtk.Toolbar, 0, 0, 1, 1);

		/* get these objects from the ui file so we can toggle between them */

		fullscreen_button = builder.get_object ("fullscreen_button") as Gtk.ToolButton;

		leave_fullscreen_button = builder.get_object ("leave_fullscreen_button") as Gtk.ToolButton;

		/* create the "undo" window action action */

		var undo_action = new SimpleAction ("undo", null);

		undo_action.activate.connect (undo_callback);

		this.add_action (undo_action);

		/* create the "fullscreen" window action */

		var fullscreen_action = new SimpleAction ("fullscreen", null);

		fullscreen_action.activate.connect (fullscreen_callback);

		this.add_action (fullscreen_action);

	}

	void undo_callback (SimpleAction simple, Variant? parameter) {

			print ("You clicked \"Undo\".\n");

	}

	void fullscreen_callback (SimpleAction simple, Variant? parameter) {

		if ((this.get_window ().get_state () & Gdk.WindowState.FULLSCREEN) != 0) {

			this.unfullscreen ();

			leave_fullscreen_button.hide ();

			fullscreen_button.show ();

		}

		else {

			this.fullscreen ();

			fullscreen_button.hide ();

			leave_fullscreen_button.show ();

		}

	}

}

/* This is the application */

class MyApplication : Gtk.Application {

	protected override void activate () {

		new MyWindow (this).show ();

	}

	protected override void startup () {

		base.startup ();

		/* Create the "new" action and add it to the app*/

		var new_action = new SimpleAction ("new", null);

		new_action.activate.connect (new_callback);

		this.add_action (new_action);

		/* Create the "open" action, and add it to the app */

		var open_action = new SimpleAction ("open", null);

		open_action.activate.connect (open_callback);

		this.add_action (open_action);

		/* You could also add the action to the app menu

		 * if you wanted to.

		 */

		//var menu = new Menu ();

		//menu.append ("New", "app.new");

		//this.app_menu = menu;

	}

	void new_callback (SimpleAction action, Variant? parameter) {

		print ("You clicked \"New\".\n");

	}

	void open_callback (SimpleAction action, Variant? parameter) {

			print ("You clicked \"Open\".\n");

	}

}

/* The main function creates the application and runs it. */

int main (string[] args) {

	return new MyApplication ().run (args);

}