Index: openacs-4/packages/categories/www/include/widget.adp
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/www/include/widget.adp,v
diff -u -r1.2 -r1.3
--- openacs-4/packages/categories/www/include/widget.adp	1 Feb 2004 19:12:52 -0000	1.2
+++ openacs-4/packages/categories/www/include/widget.adp	6 Feb 2004 14:00:31 -0000	1.3
@@ -1,7 +1,8 @@
 <if @trees:rowcount@ gt 0>
   <multiple name=trees>
     @trees.tree_name@:
-    <select name="@name@"<if @trees.single_select_p@ eq f> multiple</if>>
+    <select name="@name@"<if @trees.assign_single_p@ eq f> multiple</if>>
+    <if @trees.assign_single_p@ eq t and @trees.require_category_p@ eq f><option value=""></if>
     <group column=tree_id>
       <option value="@trees.category_id@"<if @trees.selected_p@ eq 1> selected</if>>@trees.indent;noquote@@trees.category_name@
     </group>
Index: openacs-4/packages/categories/www/include/widget.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/www/include/widget.tcl,v
diff -u -r1.2 -r1.3
--- openacs-4/packages/categories/www/include/widget.tcl	1 Feb 2004 19:12:52 -0000	1.2
+++ openacs-4/packages/categories/www/include/widget.tcl	6 Feb 2004 14:00:31 -0000	1.3
@@ -12,12 +12,12 @@
     set name category_ids
 }
 
-template::multirow create trees tree_id tree_name category_id selected_p category_name indent single_select_p
+template::multirow create trees tree_id tree_name category_id selected_p category_name indent assign_single_p require_category_p
 
 template::util::list_to_lookup [category::get_mapped_categories $object_id] mapped
 
 foreach tree [category_tree::get_mapped_trees $package_id] {
-    util_unlist $tree tree_id tree_name subtree_id assign_single_p
+    util_unlist $tree tree_id tree_name subtree_id assign_single_p require_category_p
     set one_tree [list]
     foreach category [category_tree::get_tree -subtree_id $subtree_id $tree_id] {
 	util_unlist $category category_id category_name deprecated_p level
@@ -26,6 +26,7 @@
 	    set indent "[category::repeat_string "&nbsp;" [expr 2*$level -4]].."
 	}
 	set selected_p [info exists mapped($category_id)]
-	template::multirow append trees $tree_id $tree_name $category_id $selected_p $category_name $indent $assign_single_p
+
+	template::multirow append trees $tree_id $tree_name $category_id $selected_p $category_name $indent $assign_single_p $require_category_p
     }
 }