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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="colorbutton.js" xml:lang="es">
<info>
<title type="text">ColorButton (JavaScript)</title>
<link type="guide" xref="beginner.js#color-selectors"/>
<revision version="0.1" date="2013-06-25" status="review"/>
<credit type="author copyright">
<name>Meg Ford</name>
<email its:translate="no">megford@gnome.org</email>
<years>2013</years>
</credit>
<desc>Un botón para mostrar el diálogo de selección de color</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 - 2014</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>ColorButton</title>
<media type="image" mime="image/png" src="media/colorbutton.png"/>
<p>Este ColorButton muestra un diálogo de selección de color e imprime por la terminal los valores RGB del color seleccionado.</p>
<links type="sections"/>
<section id="code">
<title>Código usado para generar este ejemplo</title>
<code mime="application/javascript" style="numbered">#!/usr/bin/gjs
const Gdk = imports.gi.Gdk;
const GObject = imports.gi.GObject;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const ColorbuttonExample = new Lang.Class ({
Name: 'Colorbutton Example',
// Create the application itself
_init: function () {
this.application = new Gtk.Application ({ application_id: 'org.example.jscolorbutton' });
// 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: "ColorButton",
default_width: 150,
default_height: 50,
border_width: 10 });
this.button = new Gtk.ColorButton();
this.color = new Gdk.RGBA();
this.color.red = 0.0;
this.color.green = 0.0;
this.color.blue = 1.0;
this.color.alpha = 0.5;
this.button.set_rgba(this.color);
this.button.connect("color-set", Lang.bind(this, this.onColorChosen));
this.label = new Gtk.Label();
this.label.set_text("Click to choose a color");
let grid = new Gtk.Grid();
grid.attach(this.button, 0, 0, 2, 1);
grid.attach(this.label, 0, 1, 2, 1);
this.window.add(grid);
this.window.show_all();
},
onColorChosen: function() {
let colorName = this.color.to_string();
this.label.set_text("You chose the color " + colorName);
}
});
// Run the application
let app = new ColorbuttonExample ();
app.application.run (ARGV);
</code>
</section>
<section id="references">
<title>Referencias de la API</title>
<p>En este ejemplo se usa lo siguiente:</p>
<list>
<item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.ColorButton.html">GtkColorButton</link></p></item>
<item><p><link href="http://developer.gnome.org/gdk3/stable/gdk3-RGBA-Colors.html">Colores RGBA</link></p></item>
</list>
</section>
</page>
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