<?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="image.js" lang="ca">
  <info>
  <title type="text">Image (JavaScript)</title>
    <link type="guide" xref="beginner.js#display-widgets"/>
    <revision version="0.1" date="2012-05-24" status="draft"/>

    <credit type="author copyright">
      <name>Taryn Fox</name>
      <email its:translate="no">jewelfox@fursona.net</email>
      <years>2012</years>
    </credit>

    <desc>A widget displaying an image</desc>
  </info>

  <title>Image</title>
  <media type="image" mime="image/png" src="media/image.png"/>
  <p>This GtkApplication displays an image file from the current directory.</p>
  <note><p>
    If the image file isn't loaded successfully, the image will contain a "broken image" icon.  The <file>filename.png</file> needs to be in the current directory for this code to work.  Use your favorite picture!
  </p></note>

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

imports.gi.versions.Gtk = '3.0';

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

class ImageExample {

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

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

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

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

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

        // Create the application window
        this._window = new Gtk.ApplicationWindow({
            application: this.application,
            window_position: Gtk.WindowPosition.CENTER,
            title: "Welcome to GNOME",
            default_height: 300,
            default_width: 300
        });

        // Create the label
        this.jsimage = new Gtk.Image ({file: "gnome-image.png"});
        this._window.add (this.jsimage);

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

// Run the application
let app = new ImageExample ();
app.application.run (ARGV);
</code>
<p>
  In this sample we used the following:
</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.Image.html">Gtk.Image</link></p></item>
</list>
</page>
