<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="menubutton.vala" xml:lang="gl">

  <info>

  <title type="text">MenuButton (Vala)</title>

    <link type="guide" xref="beginner.vala#buttons"/>

    <revision version="0.1" date="2012-07-18" status="draft"/>

    <credit type="author copyright">

      <name>Tiffany Antopolski</name>

      <email its:translate="no">tiffany.antopolski@gmail.com</email>

      <years>2012</years>

    </credit>

    <desc>A widget that shows a menu when clicked on</desc>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Fran Dieguez</mal:name>

      <mal:email>frandieguez@gnome.org</mal:email>

      <mal:years>2012-2013.</mal:years>

    </mal:credit>

  </info>

  <title>MenuButton</title>

  <media type="image" mime="image/png" src="media/menubutton.png"/>

  
The GtkMenuButton widget is used to display a menu when clicked on. This menu can be provided either as a GtkMenu, or an abstract GMenuModel.

The GtkMenuButton widget can hold any valid child widget. That is, it can hold almost any other standard GtkWidget. The most commonly used child is the provided GtkArrow.

<note>
You need to be running GNOME 3.6 for the MenuButton to work.
</note>

public class MyWindow : Gtk.ApplicationWindow {

	internal MyWindow (MyApplication app) {

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

		this.set_default_size (600, 400);

		var grid = new Gtk.Grid ();

		var menubutton = new Gtk.MenuButton();

		menubutton.set_size_request (80, 35);

		var menumodel = new Menu ();

		menumodel.append ("New", "app.new");

		menumodel.append ("About", "win.about");

		/* We create the last item as a MenuItem, so that

		 * a submenu can be appended to this menu item.

		 */

		var submenu = new Menu ();

		menumodel.append_submenu ("Other", submenu);

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

		menubutton.set_menu_model (menumodel);

		var about_action = new SimpleAction ("about", null);

		about_action.activate.connect (this.about_cb);

		this.add_action (about_action);

		this.add(grid);

		grid.attach(menubutton, 0, 0, 1, 1);

	}

	void about_cb (SimpleAction simple, Variant? parameter) {

		print ("You clicked \"About\"\n");

	}

}

public class MyApplication : Gtk.Application {

	protected override void activate () {

		new MyWindow (this).show_all ();

	}

	internal MyApplication () {

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

	}

	/* Override the 'startup' signal of GLib.Application. */

	protected override void startup () {

		base.startup ();

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

		new_action.activate.connect (this.new_cb);

		this.add_action (new_action);

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

		quit_action.activate.connect (this.quit);

		this.add_action (quit_action);

	}

	void new_cb (SimpleAction simple, Variant? parameter) {

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

	}

}

public int main (string[] args) {

	return new MyApplication ().run (args);

}

Neste exemplo empregaremos o seguinte:

<list>

  <item>
<link href="http://developer.gnome.org/gtk3/3.5/gtk3-GtkMenuButton.html">MenuButton</link>
</item>

</list>

</page>