diff -r d189ee25cf9d -r 3533d4323edc emailuis/uicomponents/inc/fstreelistobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailuis/uicomponents/inc/fstreelistobserver.h	Wed Sep 01 12:28:57 2010 +0100
@@ -0,0 +1,276 @@
+/*
+* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  An observer interface for the tree list component.
+*
+*/
+
+
+#ifndef M_FSTREELISTOBSERVER_H
+#define M_FSTREELISTOBSERVER_H
+
+#include "fstreelistconstants.h"
+
+/**
+ * MFsTreeObserver defines an interface which is used to observe tree list 
+ * events.
+ *
+ * Observer of the tree list is notified of changes in the tree list through 
+ * this interface with appropriate events.
+ * @code
+ *
+ * @endcode
+ *
+ * @lib 
+ */
+NONSHARABLE_CLASS( MFsTreeListObserver )
+    {
+public:
+
+    enum TFsTreeListEvent
+        {
+        /** 
+         * An item was added to the tree list. 
+         * No action required.
+         */
+        EFsTreeListItemAdded,
+        
+        /** 
+         * A node was added to the tree list. 
+         * No action required.
+         */
+        EFsTreeListNodeAdded,
+        
+        /** 
+         * An item was removed from the tree list. 
+         * No action required.
+         */
+        EFsTreeListItemRemoved,
+        
+        /** 
+         * A node was removed from the tree list.
+         * No action required.
+         */
+        EFsTreeListNodeRemoved,
+        
+        /**
+         * All items and nodes were removed from the tree list.
+         * No action required.
+         */
+        EFsTreeListRemovedAll,
+        
+        /**
+         * Item/Node was moved from one parent to the other in the tree list.
+         * No action required.
+         */
+        EFsTreeListItemMoved,
+        
+        /**
+         * Item's/Node's data has changed.
+         * No action required.
+         */
+        EFsTreeListItemDataChanged,
+        
+        /**
+         * Item data's visualizer has changed.
+         * No action required.
+         */
+        EFsTreeListItemVisualizerChanged,
+        
+        /**
+         * Node data's visualizer has changed.
+         * No action required.
+         */
+        EFsTreeListNodeVisualizerChanged,
+        
+        // <cmail> "Base class modifications for using touch"
+        /**
+         * Action started for selected tree item.
+         */
+        EFsTreeListItemTouchAction,
+        
+        /**
+         * Long tap action started for selected tree item. 
+         */
+        EFsTreeListItemTouchLongTap,
+                
+        /**
+         * Touch focus for list gained. 
+         */
+        EFsTreeListItemTouchFocused,    
+                
+        // </cmail>
+                
+        /**
+         * Item/Node was selected in the tree list. It means that the user
+         * pressed a selection (or other, depending on the implementation of
+         * the tree list) key on item/node.
+         * 
+         * No action required.
+         */
+        EFsTreeListItemSelected,
+        
+        /**
+         * Focus will be moved to the specified item/node.
+         * Event triggered just before an item gets focus.
+         * No action required.
+         */
+        EFsTreeListItemWillGetFocused,
+        
+        /**
+         * Focus was moved to the specified item/node.
+         * No action required.
+         */
+        EFsTreeListItemFocused,
+        
+        /**
+         * Item/node was marked.
+         * No action required.
+         */
+        EFsTreeListItemMarked,
+        
+        /**
+         * Item/node was unmarked.
+         * No action required.
+         */
+        EFsTreeListItemUnmarked,
+        
+        /**
+         * Item/node was dimmed.
+         * No action required.
+         */
+        EFsTreeListItemDimmed,
+        
+        /**
+         * Loop event. Focus has moved from the last item item in the list to 
+         * the first or form the first to the last.
+         * 
+         * No action required.
+         */
+        EFsTreeListLoop,
+        
+        /**
+         * List became visible.
+         * No action required.
+         */
+        EFsTreeListShown,
+        
+        /**
+         * List has been hidden.
+         * No action required.
+         */
+        EFsTreeListHidden,
+        
+        /**
+         * Text size in all the items/nodes in the list has increased.
+         * No action required.
+         */
+        EFsTreeListTextSizeIncreased,
+        
+        /**
+         * Text size in all the items/nodes in the list has decreased.
+         * No action required.
+         */
+        EFsTreeListTextSizeDecreased,
+        
+        /**
+         * Node change state to unrolled.
+         * No action required.
+         */
+        EFsTreeListNodeUnrolled,
+        
+        /**
+         * Node change state to rolled.
+         * No action required.
+         */
+        EFsTreeListNodeRolled,
+        
+        /**
+         * List received focus
+         */
+        EFsTreeListFocusReceived,
+
+        /**
+         * List lost focus
+         */          
+        EFsTreeListFocusLost,
+        
+        /**
+         * Item has been selected
+         */
+        EFsTreeItemSelected,
+        
+        /**
+         * Item with menu has been selected
+         */ 
+        EFsTreeItemWithMenuSelected,
+        
+        /**
+         * Right click on list.
+         */
+        EFsTreeListKeyRightArrow,
+        
+        /**
+         * Left click on list.
+         */
+        EFsTreeListKeyLeftArrow,
+
+        // <cmail>
+
+        /**
+         * Event generated when a single node is collapsed.
+         */
+        EFsTreeListItemCollapsed,
+
+        /**
+         * Event generated when a single node is expanded.
+         */
+        EFsTreeListItemExpanded,
+
+        /**
+         * Event generated when all nodes are collapsed.
+         */
+        EFsTreeListCollapsedAll,
+
+        /**
+         * Event generated when all nodes are expanded.
+         */
+        EFsTreeListExpandedAll,
+        // </cmail>
+        /**
+         * Handle focus visibility changes
+         */
+        EFsFocusVisibilityChange
+        };    
+
+public:
+
+    /**
+     * Observer of the tree list is notified of changes in the tree list
+     * through this function.
+     * 
+     * @param aEvent Event which happend in the tree list.
+     * @param aId Id of the node/item associated with the event. KFsTreeNoneID
+     *            means that the event is not associated with a node/item.
+     * @param aPoint Event coordinates. Valid only for touch events.
+     */
+    // <cmail> Touch
+    virtual void TreeListEventL( const TFsTreeListEvent aEvent, 
+                                 const TFsTreeItemId aId,
+                                 const TPoint& aPoint ) = 0;
+    // </cmail>
+    
+    };
+    
+     
+#endif // M_FSTREELISTOBSERVER_H