content_taxonomy_tree_addons-0.1 doesn't seem to do anything

I am trying to get this done in the 5.x version. I could report back with a patch for that that'd hopefully work in the 6.x version.

For a clue, see http://drupal.org/node/76500

The key (I think!) is using the optgroup facility in #options arrays in Form API. Instead of having an option tree:

"#options" = array(
  1 => "parent term tid 1 which you want unselectable", 
  2 => "term tid 2", 
  3 => "term tid 3"
)

you need to make an array of arrays of options:

"#options" = array(
  "parent term (now unselectable)" => array(
    2 => "term tid 2", 
    3 => "term tid 3"
  )
)

You could do this using hook_form_alter() from another module, or we could work it into this module (I will try the first thing first).

Sadly, Form API does not allow nested optgroups, that is, we can only make optgroups for the first-level terms. I have this working under version 5.x-1.x-dev, ugly ugly code follows.

To get it to work you have to specify a negative depth (instead of "2" you say -2 to have this patch kick in).

--- content_taxonomy/content_taxonomy_options.module    2009-03-25 18:17:25.369406874 -0600
+++ ../../prod68ws.ruv.itesm.mx/modules/content_taxonomy/content_taxonomy_options.module        2009-03-25 19:14:24.143256262 -0600
@@ -180,6 +180,12 @@
 function content_taxonomy_options_array($vid, $parent = NULL, $depth = 0, $blank_field = TRUE, $show_depth = FALSE) {
   $options = array();

+  // Handle first level optgroups when $depth is negative
+  $first_level_optroup = FALSE;
+  if ($depth < 0) {
+    $first_level_optroup_flag = TRUE;
+    $depth = -$depth;
+  }
   if ($depth == 1) {
     $tree = taxonomy_get_children($parent, $vid);
   }
@@ -200,7 +206,29 @@
       else {
         $value = $term->name;
       }
-      $options[$term->tid] = $value;
+
+      if ($first_level_optroup_flag) {
+        $parents = taxonomy_get_parents($term->tid);
+        sort($parents);
+        $parent_tid = $parents[0]->tid;
+        if (sizeof($parents) == 0) {
+          // Does it have children?
+          if (sizeof($children = taxonomy_get_children($term->tid)) == 0) {
+            $options[$term->tid] = $value;
+          } else {
+            $first_level_groupname[$term->tid] = $term->name;
+          }
+        } else {
+          if ($first_level_groupname[$parent_tid]) {
+            $options[$first_level_groupname[$parent_tid]][] = $value;
+          } else {
+            $options[$term->tid] = $value;
+          }
+        }
+      } else {
+        $options[$term->tid] = $value;
+      }
+
     }
   }
   return $options;

subscribing.
but I can't apply the above patch to last -dev package, I get error: malformed patch at line 4.

@ksc: Hierarchical Select support is moving closer =)

Check out: #342992: Port HS support for Content Taxonomy to Drupal 6

Closing due to HS support now solved.

This is simple module, that disable checkbox on parents in Content Taxonomy Tree module
This is dev version.

I don't see that this did anything after it was installed. No extra checkboxes. I'm using Drupal 6.16. Is there any documentation for this module?

thanks for the module!