<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"/>

  
An image in a scrolled window.

  <links type="section"/>

  <section id="code">

    <title>Code used to generate this example</title>

    #!/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);

  </section>

  <section id="references">

    <title>API References</title>

    
In this sample we used the following:

    <list>

      <item>
<link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.ScrolledWindow.html">GtkScrolledWindow</link>
</item>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/gtk3-Standard-Enumerations.html">Standard Enumerations</link>
</item>

      <item>
<link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Image.html">GtkImage</link>
</item>

    </list>

  </section>

</page>