<?xml version="1.0" encoding="utf-8"?>
<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="grid.js" xml:lang="gl">
  <info>
  <title type="text">Grid (JavaScript)</title>
    <link type="guide" xref="beginner.js#layout"/>
    <revision version="0.1" date="2012-05-26" status="draft"/>

    <credit type="author copyright">
      <name>Susanna Huhtanen</name>
      <email its:translate="no">ihmis.suski@gmail.com</email>
      <years>2012</years>
    </credit>
    <credit type="editor">
	<name>Taryn Fox</name>
        <email its:translate="no">jewelfox@fursona.net</email>
    </credit>

    <desc>Pack widgets in rows and columns</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>Grade</title>
  <media type="image" mime="image/png" src="media/grid.png"/>
  <p>A button widget connected to a progress bar, inside of a grid which handles the layout.</p>

<code mime="application/javascript" style="numbered">#!/usr/bin/gjs

const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;

const GridExample = new Lang.Class ({
    Name: 'Grid Example',

    /* Create the application itself
       This boilerplate code is needed to build any GTK+ application. */
        _init: function () {
            this.application = new Gtk.Application ({
                application_id: 'org.example.jsgrid',
                flags: Gio.ApplicationFlags.FLAGS_NONE
            });

    // Connect 'activate' and 'startup' signals to the callback functions
    this.application.connect('activate', Lang.bind(this, this._onActivate));
    this.application.connect('startup', Lang.bind(this, this._onStartup));
    },

    // Callback function for 'activate' signal presents windows when active
    _onActivate: function () {
        this._window.present ();
    },

    // Callback function for 'startup' signal initializes menus and builds the UI
    _onStartup: function () {
        this._buildUI ();
    },




    // Build the application's UI
    _buildUI: function () {

        // Create the application window
            this._window = new Gtk.ApplicationWindow  ({ application: this.application,
                                                         window_position: Gtk.WindowPosition.CENTER,
                                                         title: "Grid Example"});

        // Create the grid
        this.Grid = new Gtk.Grid ();

        // Create the widgets inside the grid
        this.progressBar = new Gtk.ProgressBar ();
        this.Button = new Gtk.Button ({ label: "Button" });
        this.Button.connect ("clicked", Lang.bind(this, this._clickHandler));

        // Assemble the grid
        this._window.add (this.Grid);
        this.Grid.attach (this.Button, 1, 1, 1, 1);
        this.Grid.attach_next_to (this.progressBar, this.Button, Gtk.PositionType.BOTTOM, 1, 1);

                // Show the window and all child widgets
                this._window.show_all();
    },

    // Here's the function that says what happens when the button is clicked
    _clickHandler: function () {
        this.progressBar.pulse ();
    }


});

// Run the application
let app = new GridExample ();
app.application.run (ARGV);
</code>
<p>Neste exemplo empregaremos o seguinte:</p>
<list>
  <item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Application.html">Gtk.Application</link></p></item>
  <item><p><link href="http://developer.gnome.org/gtk3/stable/GtkApplicationWindow.html">Gtk.ApplicationWindow</link></p></item>
  <item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Button.html">Gtk.Button</link></p></item>
  <item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Grid.html">Gtk.Grid</link></p></item>
  <item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.ProgressBar.html">Gtk.ProgressBar</link></p></item>
</list>
</page>
