# Image (JavaScript)

Taryn Fox
jewelfox@fursona.net 2012
A widget displaying an image
Fran Dieguez
frandieguez@gnome.org 2012-2013.

# Image

This GtkApplication displays an image file from the current directory.

If the image file isn't loaded successfully, the image will contain a "broken image" icon. The filename.png needs to be in the current directory for this code to work. Use your favorite picture!

#!/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);

Neste exemplo empregaremos o seguinte:

Gtk.Application

Gtk.ApplicationWindow

Gtk.Image