<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" xml:lang="fr">

  <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>Un élément graphique qui affiche une image</desc>

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

      <mal:name>Luc Rebert,</mal:name>

      <mal:email>traduc@rebert.name</mal:email>

      <mal:years>2011</mal:years>

    </mal:credit>

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

      <mal:name>Alain Lojewski,</mal:name>

      <mal:email>allomervan@gmail.com</mal:email>

      <mal:years>2011-2012</mal:years>

    </mal:credit>

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

      <mal:name>Luc Pionchon</mal:name>

      <mal:email>pionchon.luc@gmail.com</mal:email>

      <mal:years>2011</mal:years>

    </mal:credit>

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

      <mal:name>Bruno Brouard</mal:name>

      <mal:email>annoa.b@gmail.com</mal:email>

      <mal:years>2011-12</mal:years>

    </mal:credit>

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

      <mal:name>Luis Menina</mal:name>

      <mal:email>liberforce@freeside.fr</mal:email>

      <mal:years>2014</mal:years>

    </mal:credit>

  </info>

  <title>Image</title>

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

  
Cette application Gtk affiche un fichier image issu du dossier en cours.

  <note>
Si le fichier image n'est pas chargé correctement, l'image contient une icône en forme d'« image brisée ». Le <file>nomdufichier.png</file> doit être dans le dossier actuel pour que ce code fonctionne. Faites bon usage de votre photo favorite !
</note>

#!/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);

Dans cet exemple, les éléments suivants sont utilisés :

<list>

  <item>
<link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Application.html">Gtk.Application</link>
</item>

  <item>
<link href="http://developer.gnome.org/gtk3/stable/GtkApplicationWindow.html">Gtk.ApplicationWindow</link>
</item>

  <item>
<link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Image.html">Gtk.Image</link>
</item>

</list>

</page>