Developing GNOME Apps in
Javascript
Felipe Borges
<felipeborges@gnome.org>
Why talk about Gjs?
GNOME is....
Desktop environment
Development platform
GNOME Developer Platform
Javascript is pretty cool!
It has bad parts!
Globals
Unexpected behaviour
No block scope
But it also has good parts!
Closures are central
Functions are first-class objects
Prototypal inheritance
Is everywhere!
Gjs
First released in 2008
Well maintained
Main development language for
writing GNOME Apps
GNOME Apps in JS
Documents
Shell
Polari
gjs-console
Get started
Gjs and Gtk
Actions and signals
Run your application
const Lang = imports.lang;
const Gtk = imports.gi.Gtk;
const App = new Lang.Class({
Name: 'App',
Extends: Gtk.Application,...
_onActivate: function () {
this._window.show_all();
},
_onStartup: function () {
this._window = new Gtk.ApplicationWindow(...
Run your application
let app = new App();
app.run(ARGV);
$ gjs helloWorld.js
http://developer.gnome.org/
Become a Friend of GNOME
Individual donation program
Donations support the
GNOME project
http://gnome.org/friends
Developing GNOME Apps in
Javascript
Felipe Borges
<felipeborges@gnome.org>
Developing GNOME Apps in Javascript
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Developing GNOME Apps in Javascript

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Developing GNOME Apps in Javascript

  1. 1. Developing GNOME Apps in Javascript Felipe Borges <felipeborges@gnome.org>
  2. 2. Why talk about Gjs?
  3. 3. GNOME is.... Desktop environment Development platform
  4. 4. GNOME Developer Platform
  5. 5. Javascript is pretty cool!
  6. 6. It has bad parts! Globals Unexpected behaviour No block scope
  7. 7. But it also has good parts! Closures are central Functions are first-class objects Prototypal inheritance Is everywhere!
  8. 8. Gjs First released in 2008 Well maintained Main development language for writing GNOME Apps
  9. 9. GNOME Apps in JS Documents Shell Polari
  10. 10. gjs-console
  11. 11. Get started Gjs and Gtk Actions and signals Run your application
  12. 12. const Lang = imports.lang; const Gtk = imports.gi.Gtk; const App = new Lang.Class({ Name: 'App', Extends: Gtk.Application, _init: function () { this.parent({ application_id: 'org.example.App' }); this.connect('activate', Lang.bind(this, this._onActivate)); this.connect('startup', Lang.bind(this, this._onStartup)); },
  13. 13. _onActivate: function () { this._window.show_all(); }, _onStartup: function () { this._window = new Gtk.ApplicationWindow({ application: this, title: "Hello World!" }); this._window.set_default_size(200, 200); let label = new Gtk.Label({ label: "Hello World" }); this._window.add(label); } });
  14. 14. Run your application let app = new App(); app.run(ARGV); $ gjs helloWorld.js
  15. 15. http://developer.gnome.org/
  16. 16. Become a Friend of GNOME Individual donation program Donations support the GNOME project http://gnome.org/friends
  17. 17. Developing GNOME Apps in Javascript Felipe Borges <felipeborges@gnome.org>

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