<?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(800, 640);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());

// define toolbar definition
$toolbar_definition = array('Zoom_In', 'Zoom_Out', 'Zoom_100');
setup_toolbar($vbox, $toolbar_definition); // note 1

$hbox = new GtkHBox();
$vbox->pack_start($hbox, 0);

$hbox->pack_start($url_entry = new GtkEntry('http://gtk.php.net/'));
$hbox->pack_start($go_button = new GtkButton('Go'), 0);
$go_button->set_size_request(32, -1);

$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC,Gtk::POLICY_AUTOMATIC);
$vbox->pack_start($scrolled_win);
$gtkhtml = new GtkHTML();
$scrolled_win->add($gtkhtml);

$gtkhtml->connect('url-requested', 'on_url_requested');
$gtkhtml->connect('link-clicked', 'on_link_clicked');

$url_entry->connect('activate', 'on_url_entry_activate', $go_button);
$go_button->connect('clicked', 'on_go_button', $url_entry, $gtkhtml);
$go_button->clicked();

$window->show_all();
Gtk::main();

function on_url_entry_activate($entry, $go_button) {
    $go_button->clicked();
}

function on_go_button($button, $url_entry, $gtkhtml) {
    $url = $url_entry->get_text();
    $html_text = file_get_contents($url);
    $gtkhtml->set_base($url);
    $gtkhtml->load_from_string($html_text);
}

function on_url_requested($gtkhtml, $url, $stream) {
    echo "image url = $url\n";
    // load the image

}

function on_link_clicked($gtkhtml, $url) {
    global $url_entry, $go_button;
    $url_entry->set_text($url);
    $go_button->clicked();
}

// setup toolbar
function setup_toolbar($container, $toolbar_definition) {
    $toolbar = new GtkToolBar();
    foreach($toolbar_definition as $item) {
        if ($item=='<hr>') {
            $toolbar->insert(new GtkSeparatorToolItem(), -1);
        } else {
            $stock_image_name = 'Gtk::STOCK_'.strtoupper($item);
            if (defined($stock_image_name)) {
                $toolbar_item = GtkToolButton::new_from_stock(
                    constant($stock_image_name));
                $toolbar->insert($toolbar_item, -1);
                $toolbar_item->connect('clicked',
                    'on_toolbar_button', $item);
            }
        }
    }
    $container->pack_start($toolbar, 0);
}

// process toolbar
function on_toolbar_button($button, $item) {
    echo "toolbar clicked: $item\n";
    global $gtkhtml;
    switch($item) {
        case 'Zoom_In': $gtkhtml->zoom_in(); break; // note 2
        case 'Zoom_Out': $gtkhtml->zoom_out(); break; // note 3
        case 'Zoom_100': $gtkhtml->zoom_reset(); // note 4
    }
}

?>