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<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="aboutdialog.js" xml:lang="gl">
<info>
<title type="text">AboutDialog (JavaScript)</title>
<link type="guide" xref="beginner.js#windows"/>
<revision version="0.1" date="2012-05-30" status="draft"/>
<credit type="author copyright">
<name>Taryn Fox</name>
<email its:translate="no">jewelfox@fursona.net</email>
<years>2012</years>
</credit>
<desc>Mostrar información sobre un aplicativo</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Fran Dieguez</mal:name>
<mal:email>frandieguez@gnome.org</mal:email>
<mal:years>2012-2013.</mal:years>
</mal:credit>
</info>
<title>AboutDialog</title>
<media type="image" mime="image/png" src="media/aboutdialog_GMenu.png"/>
<p>A modal dialog window which shows information about an application and its creators. This one is triggered by clicking "About" in the application's menu, which is normally a good place to put it.</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 AboutDialogExample {
// Create the application itself
constructor() {
this.application = new Gtk.Application({
application_id: 'org.example.jsaboutdialog',
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 creates the menu and builds the UI
_onStartup() {
this._initMenus();
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: "AboutDialog Example",
default_height: 250,
default_width: 350 });
// Show the window and all child widgets
this._window.show_all();
}
// Create the application menu
_initMenus() {
let menu = new Gio.Menu();
menu.append("About", 'app.about');
menu.append("Quit",'app.quit');
this.application.set_app_menu(menu);
// Create the "About" menu option and have it call the _showAbout() function
let aboutAction = new Gio.SimpleAction({ name: 'about' });
aboutAction.connect('activate', () => { this._showAbout(); });
this.application.add_action(aboutAction);
// Create the "Quit" menu option and have it close the window
let quitAction = new Gio.SimpleAction ({ name: 'quit' });
quitAction.connect('activate', () => { this._window.destroy(); });
this.application.add_action(quitAction);
}
_showAbout() {
// String arrays of the names of the people involved in the project
var authors = ["GNOME Documentation Team"];
var documenters = ["GNOME Documentation Team"];
// Create the About dialog
let aboutDialog = new Gtk.AboutDialog({ title: "AboutDialog Example",
program_name: "GtkApplication Example",
copyright: "Copyright \xa9 2012 GNOME Documentation Team",
authors: authors,
documenters: documenters,
website: "http://developer.gnome.org",
website_label: "GNOME Developer Website" });
// Attach the About dialog to the window
aboutDialog.modal = true;
aboutDialog.transient_for = this._window;
// Show the About dialog
aboutDialog.show();
// Connect the Close button to the destroy signal for the dialog
aboutDialog.connect('response', function() {
aboutDialog.destroy();
});
}
};
// Run the application
let app = new AboutDialogExample();
app.application.run(ARGV);
</code>
<p>Neste exemplo empregaremos o seguinte:</p>
<list>
<item><p><link href="http://developer.gnome.org/gio/unstable/GMenu.html">GMenu</link></p></item>
<item><p><link href="http://developer.gnome.org/gio/stable/GSimpleAction.html">GSimpleAction</link></p></item>
<item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.AboutDialog.html">Gtk.AboutDialog</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>
</list>
</page>
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