# Spinner (JavaScript)

Taryn Fox
jewelfox@fursona.net 2012
Unha animación spinner
Fran Dieguez
frandieguez@gnome.org 2012-2013.

# Indicador de progreso

This Spinner is stopped and started by pressing the spacebar.

#!/usr/bin/gjs

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

const SpinnerExample = new Lang.Class ({ Name: 'Spinner Example',

// Create the application itself _init: function () { this.application = new Gtk.Application ({ application_id: 'org.example.jsspinner', 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 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: "Spinner Example", default_height: 200, default_width: 200, border_width: 30 });

// Create a spinner which starts spinning automatically this._spinner = new Gtk.Spinner ({active: true}); this._window.add (this._spinner);

// Connect a keypress event to the function that makes it start or stop spinning this._window.connect("key-press-event", Lang.bind(this, this._onKeyPress));

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

_onKeyPress: function(widget, event) {

// Get the value of the key that was pressed let keyval = event.get_keyval()[1];

// If it was the spacebar, toggle the spinner to start or stop if (keyval == Gdk.KEY_space) { if (this._spinner.active == true) this._spinner.stop(); else this._spinner.start(); } }

});

// Run the application let app = new SpinnerExample (); app.application.run (ARGV);

Neste exemplo empregaremos o seguinte:

Gdk - Key Values

Gtk.Application

Gtk.ApplicationWindow

Gtk.Spinner