--- a/dnd_test/dnd_test.module	Tue Feb 17 15:46:36 2009 -0600
+++ b/dnd_test/dnd_test.module	Thu Feb 19 12:33:19 2009 -0600
@@ -1,5 +1,8 @@
 <?php
 
+/**
+ * Implementation of hook_menu().
+ */
 function dnd_test_menu() {
   $items = array();
   $items['dnd-test/library'] = array(
@@ -10,10 +13,19 @@
   return $items;
 }
 
+/**
+ * Implementation of hook_perm().
+ */
 function dnd_test_perm() {
   return array('access dnd test library');
 }
 
+
+/**
+ * Implementation of hook_form_alter().
+ *
+ * This demonstrates how to attach Drag and Drop to a given textarea.
+ */
 function dnd_test_form_alter(&$form, &$form_state) {
   if ($form['#id'] == 'node-form' && $form['type']['#value'] == 'page') {
     drupal_add_css(drupal_get_path('module', 'dnd_test') .'/dnd_test.css');
@@ -26,21 +38,92 @@
   }
 }
 
+/**
+ * Implementation of hook_theme().
+ */
+function dnd_test_theme() {
+  return array(
+    'dnd_editor_item'  => array(
+      'arguments' => array('i' => NULL, 'size' => NULL),
+      'template'  => 'dnd-editor-item',
+    ),
+    'dnd_library_item' => array(
+      'arguments' => array('i' => NULL), 
+      'template'  => 'dnd-library-item',
+    ),
+  );
+}
+
+/**
+ * Page call back that returns some JSON
+ */
 function dnd_test_library() {
+  $page = ($_GET['page']) ? $_GET['page'] : 1;
+  $test_library = dnd_test_generate_library($page);
+  return drupal_json(array(
+    'header'  => '<h3>'. t('Test library: Page @page', array('@page' => $page)) .'</h3>',
+    'library' => $test_library['library'],
+    'editor_representations' => $test_library['editor_representations'],
+    'footer'  => '<div class="pager">'. l(t('1'), 'dnd-test/library') . ' '. l(t('2'), 'dnd-test/library', array('query' => array('page' => 2))) .'</div>',
+  ));
+}
 
-  $var = array(
-    'header' => '<h3>Test library</h3>',
-    'footer' => '<div class="pager">'. l(1, 'dnd-test/library') . ' '. l(2, 'dnd-test/library', array('query' => array('page' => 2))) .'</div>',
+/**
+ * Create contrived output
+ */
+function dnd_test_generate_library($page = 1, $limit = 5) {
+  $start = ($page * $limit) - ($limit); 
+  $end   = $page * $limit;
+
+  $library = '';
+  $editor_representations = array();
+  for ($i=$start + 1; $i < $end + 1; $i++) {
+    $library .= theme('dnd_library_item', $i);
+    $editor_representations += dnd_editor_items($i);
+  }
+  return array(
+    'library' => $library,
+    'editor_representations' => $editor_representations,
   );
-  $modifier = ($_GET['page'] == 2) ? 'page-2' : 'page-1';
-  for ($i=1; $i < 6; $i++) {
-    $library = '<div class="row"><a href="" class="drop" id="image-'. $i .'-'. $modifier .'">'. theme('image', drupal_get_path('module', 'dnd_test') .'/img/'. $modifier .'-small.jpg') .'Image '. $i .'</a></div>';
-    $editor = theme('image', drupal_get_path('module', 'dnd_test') .'/img/'. $modifier .'-large.jpg');
-    $var['library']['image-'. $i .'-'. $modifier] = array(
-      'library' => $library,
-      'editor'  => $editor,
-    );
+}
+
+/**
+ * Theme wrapper that spins out multiple library representations for a given
+ * editor representation.  This is because we want to demonstrate how to allow
+ * for multiple versions (i.e. different sizes) of a single item
+ */
+function dnd_editor_items($i) {
+  $item = array();
+  foreach(array(t('S'), t('M'), t('L')) as $size) {
+    $item['item-'. $i .'-'. $size] = theme('dnd_editor_item', $i, $size);
   }
-  drupal_json($var);
-  exit();
+  return $item;
 }
+
+/**
+ * Completely contrived edit item theme function
+ */
+function template_preprocess_dnd_library_item(&$variables) {
+  $i = $variables['i'];
+  $variables['image'] = theme('image', drupal_get_path('module', 'dnd_test') .'/img/item-'. $i .'-thumb.jpg');
+  $variables['title'] = t('Lorem Ipsum @count', array('@count' => $i));
+  $variables['date'] = 'Feb 18 2009';
+  $variables['author'] = 'David Eads';
+  foreach(array(t('S'), t('M'), t('L')) as $size) {
+    $sizes[] = l('<span>'. $size .'</span>', '', array( 
+      'html'       => TRUE,
+      'attributes' => array(
+        'class' => 'drop size-'. $size, 
+        'id' => 'item-'. $i .'-'. $size,
+      ),
+      'query' => array('dnd_id' => 'item-'. $i .'-'. $size),
+    ));
+  }
+  $variables['sizes'] = '<ul><li>'. implode('</li><li>', $sizes) .'</li></ul>';
+}
+
+
+function template_preprocess_dnd_editor_item(&$variables) {
+  list($i, $size) = array($variables['i'], $variables['size']);
+  $variables['image'] = theme('image', drupal_get_path('module', 'dnd_test') .'/img/item-'. $i .'-'. $size .'.jpg');
+}