gnome-devel-docs 3.28.0-1 / usr / share / help / es / gnome-devel-demos / progressbar.js.page

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<?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="progressbar.js" xml:lang="es">
  <info>
  <title type="text">ProgressBar (JavaScript)</title>
    <link type="guide" xref="beginner.js#display-widgets"/>
    <revision version="0.1" date="2012-06-01" status="draft"/>

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

    <desc>Una barra que indica el progreso de manera visual</desc>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Daniel Mustieles</mal:name>
      <mal:email>daniel.mustieles@gmail.com</mal:email>
      <mal:years>2011 - 2017</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Nicolás Satragno</mal:name>
      <mal:email>nsatragno@gmail.com</mal:email>
      <mal:years>2012 - 2013</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Jorge González</mal:name>
      <mal:email>jorgegonz@svn.gnome.org</mal:email>
      <mal:years>2011</mal:years>
    </mal:credit>
  </info>

  <title>ProgressBar</title>
  <media type="video" mime="application/ogv" src="media/progressbar.ogv">
    <tt:tt xmlns:tt="http://www.w3.org/ns/ttml">
      <tt:body>
        <tt:div begin="0s" end="6s">
          <tt:p>Pulsar cualquier tecla detiene e inicia esta ProgressBar.</tt:p>
        </tt:div>
      </tt:body>
    </tt:tt>
  </media>
  <p>La ProgressBar se detiene y se inicia pulsando una tecla.</p>

<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 ProgressBarExample {

    // Create the application itself
    constructor() {
        this.application = new Gtk.Application({
            application_id: 'org.example.jsprogressbar',
            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 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,
                                                       default_height: 20,
                                                       default_width: 220,
                                                       title: "ProgressBar Example"});

        // Create the progress bar
        this.progressBar = new Gtk.ProgressBar ();
        this._window.add(this.progressBar);

        // Start the function that pulses the bar every 100 milliseconds
        this.sourceID = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 100,
                                         this._barPulse.bind(this));

        // Connect a keypress event to the function that toggles the bar to start or stop pulsing
        this._window.connect("key-press-event", this._onKeyPress.bind(this));

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

    // Pulse the progressbar (unless it has been disabled by a keypress)
    _barPulse() {
        this.progressBar.pulse();
        return true;
    }

    // Start or stop the progressbar when a key is pressed
    _onKeyPress() {
        if (this.sourceID == 0)
            this.sourceID = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 100,
                                             this._barPulse.bind(this));
        else {
            GLib.source_remove(this.sourceID);
            this.sourceID = 0;
        }
    }

};

// Run the application
let app = new ProgressBarExample ();
app.application.run (ARGV);
</code>
<p>En este ejemplo se usa lo siguiente:</p>
<list>
  <item><p><link href="http://www.roojs.org/seed/gir-1.2-gtk-3.0/gjs/GLib.html">GLib</link></p></item>
  <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.ProgressBar.html">Gtk.ProgressBar</link></p></item>
</list>
</page>

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