<?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="scrolledwindow.js" xml:lang="pt-BR">
  <info>
    <title type="text">ScrolledWindow (JavaScript)</title>
    <link type="guide" xref="beginner.js#scrolling"/>
    <revision version="0.1" date="2012-05-26" status="draft"/>

    <credit type="author copyright">
      <name>Meg Ford</name>
      <email its:translate="no">megford@gnome.org</email>
      <years>2013</years>
    </credit>

    <desc>Adds scrollbars to its child widget</desc>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Rafael Ferreira</mal:name>
      <mal:email>rafael.f.f1@gmail.com</mal:email>
      <mal:years>2013</mal:years>
    </mal:credit>
  </info>

  <title>ScrolledWindow</title>
  <media type="image" mime="image/png" src="media/scrolledwindow.png"/>
  <p>An image in a scrolled window.</p>

  <links type="section"/>

  <section id="code">
    <title>Code used to generate this example</title>
    <code mime="application/javascript" style="numbered">#!/usr/bin/gjs

imports.gi.versions.Gtk = '3.0';

const GObject = imports.gi.GObject;
const Gtk = imports.gi.Gtk;

class ScrolledWindowExample {

    // Create the application itself
    constructor() {
        this.application = new Gtk.Application({
            application_id: 'org.example.jscrolledwindow'
        });

        // 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,
            title: "ScrolledWindow Example",
            default_width: 200,
            default_height: 200,
            border_width: 10
        });
        // the scrolledwindow
        this.scrolledWindow = new Gtk.ScrolledWindow();
        this.scrolledWindow.set_border_width(10);
        // there is always the scrollbar (otherwise: AUTOMATIC - only if needed - or NEVER)
        this.scrolledWindow.set_policy(Gtk.PolicyType.ALWAYS, Gtk.PolicyType.ALWAYS);
        // an image - slightly larger than the window
        this.image = new Gtk.Image();
        this.image.set_from_file("gnome-image.png");

        // add the image to the scrolledwindow
        this.scrolledWindow.add_with_viewport(this.image);

        // add the scrolledwindow to the window
        this.window.add(this.scrolledWindow);
        this.window.show_all();
    }
};

// Run the application
let app = new ScrolledWindowExample();
app.application.run (ARGV);
</code>
  </section>

  <section id="references">
    <title>API References</title>
    <p>In this sample we used the following:</p>
    <list>
      <item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.ScrolledWindow.html">GtkScrolledWindow</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/gtk3-Standard-Enumerations.html">Standard Enumerations</link></p></item>
      <item><p><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Image.html">GtkImage</link></p></item>
    </list>
  </section>
</page>