1 files changed, 29 insertions, 5 deletions
diff --git a/lib/dijit/themes/tundra/Tree.css b/lib/dijit/themes/tundra/Tree.css
index 5ba1c8804..76c81e0b1 100644
--- a/lib/dijit/themes/tundra/Tree.css
+++ b/lib/dijit/themes/tundra/Tree.css
@@ -1,72 +1,96 @@
+/* Tree */
 
 .tundra .dijitTreeNode {
     background-image : url('images/i.gif');
     background-repeat : repeat-y;
-    zoom: 1;	
+    zoom: 1;	/* force layout on IE (TODO: may not be needed anymore) */
 }
+
+/* left vertical line (grid) for all nodes */
 .tundra .dijitTreeIsLast {
     background: url('images/i_half.gif') no-repeat;
 }
+
 .tundra .dijitTreeIsRoot {
     margin-left: 0;
     background-image: none;
 }
+
 .tundra .dijitTreeExpando {
     width: 18px;
     height: 18px;
 }
+
 .tundra .dijitTreeRow {
-	
+	/* so insert line shows up on IE when dropping after a target element */
 	padding-bottom: 2px;
 }
+
 .tundra .dijitTreeContent {
     min-height: 18px;
     min-width: 18px;
 }
+
 .tundra .dijitTreeRowSelected .dijitTreeLabel {
 	background:#e2ebfe;
 }
 .tundra .dijitTreeRowHover {
-	
+	/* using a transparent png so that we can still see grid lines, which are (unfortunately) behind the dijitRowNode that we are hovering over */
 	background-image: url(images/treeHover.png);
 	background-repeat: repeat;
 	background-color: transparent !important;
 }
+
 .tundra .dijitTreeExpandoOpened {
 	background-image: url('images/treeExpand_minus.gif');
 }
+
 .tundra .dijitTreeExpandoClosed {
 	background-image: url('images/treeExpand_plus.gif');
 }
+
 .tundra .dijitTreeExpandoLeaf {
 	background-image: url('images/treeExpand_leaf.gif');
 }
+
 .tundra .dijitTreeExpandoLoading {
 	background-image: url('images/treeExpand_loading.gif');
 }
+
 .tundra .dijitTreeIcon {
 	width: 16px;
 	height: 16px;
 }
+
 .tundra .dijitFolderOpened {
 	background: url('images/folderOpened.gif') no-repeat;
 }
+
 .tundra .dijitFolderClosed {
 	background: url('images/folderClosed.gif') no-repeat;
 }
+
 .tundra .dijitLeaf {
 	background: url('images/leaf.gif') no-repeat;
 }
+
+/* Drag and Drop on TreeNodes
+ * Put insert line on dijitTreeContent node so it's aligned w/
+ * (ie, indented equally with) target element, even
+ * though dijitTreeRowNode is the actual "drag object"
+ */
 .tundra .dijitTreeNode .dojoDndItemBefore,
 .tundra .dijitTreeNode .dojoDndItemAfter {
 	border-bottom: none;
 	border-top: none;
 }
+
 .tundra .dijitTreeNode .dojoDndItemBefore .dijitTreeContent {
-	
+	/* copied from Common.css */
 	border-top: 2px solid #369;
 }
+
 .tundra .dijitTreeNode .dojoDndItemAfter .dijitTreeContent {
-	
+	/* copied from Common.css */
 	border-bottom: 2px solid #369;
 }