From e40c5d4def557ea5abb45775d7aef59596ff6292 Mon Sep 17 00:00:00 2001
From: nicolasconnault <nicolasconnault>
Date: Fri, 24 Apr 2009 07:49:30 +0000
Subject: [PATCH] MDL-18949 Move selector is now disabled unless at least one
 grade item is selected.

---
 grade/edit/tree/functions.js | 17 +++++++++++++++++
 grade/edit/tree/index.php    |  2 +-
 grade/edit/tree/lib.php      |  2 +-
 3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/grade/edit/tree/functions.js b/grade/edit/tree/functions.js
index 9ef91b36167..44835cc4ed1 100755
--- a/grade/edit/tree/functions.js
+++ b/grade/edit/tree/functions.js
@@ -12,6 +12,8 @@ function togglecheckboxes(eid, value) {
         }
     }
 
+    toggleCategorySelector();
+
 }
 
 function toggle_advanced_columns() {
@@ -26,3 +28,18 @@ function toggle_advanced_columns() {
         YAHOO.util.Dom.replaceClass(shownAdvEls[i], "advancedshown", "advanced");
     }
 }
+
+/**
+ * Check if any of the grade item checkboxes is ticked. If yes, enable the dropdown. Otherwise, disable it
+ */
+function toggleCategorySelector() {
+    var itemboxes = YAHOO.util.Dom.getElementsByClassName('itemselect');
+    for (var i = 0; i < itemboxes.length; i++) {
+        if (itemboxes[i].checked) {
+            document.getElementById('menumoveafter').disabled = false;
+            return true;
+        }
+    }
+    document.getElementById('menumoveafter').disabled = 'disabled';
+
+}
diff --git a/grade/edit/tree/index.php b/grade/edit/tree/index.php
index 26d7e5abe03..4a79df69abd 100644
--- a/grade/edit/tree/index.php
+++ b/grade/edit/tree/index.php
@@ -330,7 +330,7 @@ if (!$moving) {
     echo '<input type="hidden" name="bulkmove" value="0" id="bulkmoveinput" />';
     echo get_string('moveselectedto', 'grades') . ' ';
     echo choose_from_menu($categories, 'moveafter', '', 'choose',
-            'document.getElementById(\'bulkmoveinput\').value=1;document.getElementById(\'gradetreeform\').submit()', 0, true);
+            'document.getElementById(\'bulkmoveinput\').value=1;document.getElementById(\'gradetreeform\').submit()', 0, true, true);
     echo '<div id="noscriptgradetreeform" style="display: inline;">
             <input type="submit" value="'.get_string('go').'" />
           </div>
diff --git a/grade/edit/tree/lib.php b/grade/edit/tree/lib.php
index 7ebdd820237..2ff1dca05b4 100755
--- a/grade/edit/tree/lib.php
+++ b/grade/edit/tree/lib.php
@@ -952,7 +952,7 @@ class grade_edit_tree_column_select extends grade_edit_tree_column {
         $itemselect = '';
 
         if ($params['itemtype'] != 'course' && $params['itemtype'] != 'category') {
-            $itemselect = '<input class="itemselect" type="checkbox" name="select_'.$params['eid'].'" />';
+            $itemselect = '<input class="itemselect" type="checkbox" name="select_'.$params['eid'].'" onchange="toggleCategorySelector();"/>';
         }
         return '<td class="cell last selection">' . $itemselect . '</td>';
     }