<?php

dl('php_gtk.' . (strstr(PHP_OS, 'WIN') ? 'dll' : 'so'));

/* callback that forces a redraw of simple child widgets */
function exposure($adj, $layout) {
  $layout->queue_draw();
}

/* set up a window and size it to be smaller than the intended layout */
$window = &new GtkWindow();
$window->set_position(GTK_WIN_POS_CENTER);
$window->set_title('Layout');
$window->set_usize(200, 200);
$window->connect_object('destroy', array('gtk', 'main_quit'));

/* create and add the scrolled window to the main window */
$scrolledwindow = &new GtkScrolledWindow();
$window->add($scrolledwindow);

/* create and add the layout widget to the scrolled window */
$layout = &new GtkLayout(null, null);
$scrolledwindow->add($layout);

/* set the layout to be bigger than the windows that contain it */
$x = gdk::screen_width();
$y = gdk::screen_height();
$layout->set_size($x, $y);

/* get the adjustment objects and connect them to the callback.  This
   part should not be necessary under *nix systems */
$hadj = $scrolledwindow->get_hadjustment();
$vadj = $scrolledwindow->get_vadjustment();
$hadj->connect('value-changed', 'exposure', $layout);
$vadj->connect('value-changed', 'exposure', $layout);

/* populate the layout with a mixture of buttons and labels */
for ($i=0 ; $i < round($y/100); $i++)  {
  for ($j=0 ; $j < round($x/100); $j++)  {
    $buf =sprintf('Button %d, %d', $i, $j);
    if (($i + $j) % 2) $button = &new GtkButton($buf);
    else $button = &new GtkLabel($buf);
    $layout->put($button, $j*100, $i*100);
  }
}

/* display everything and run the main loop */
$layout->show_all();
$window->show_all();

gtk::main();

?>