--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/medialists/inc/mglxmedialistobserver.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,154 @@
+/*
+* Copyright (c) 2008-2009 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:    Media item list observer interface 
+*
+*/
+
+
+
+
+#ifndef M_GLXMEDIALISTOBSERVER_H
+#define M_GLXMEDIALISTOBSERVER_H
+
+#include <mpxcommand.h>
+#include <mpxmessage2.h>
+#include <mpxattribute.h>
+#include <glxlistdefs.h>
+
+#include "glxthumbnailinfo.h"
+
+// Forward declaration
+class MGlxMediaList;
+
+/*! 
+  @class MGlxMediaListObserver
+  
+  @discussion Observes for changes in media list
+              MPX-specific
+  */
+class MGlxMediaListObserver
+    {
+public:
+
+    /**
+     * Notification that media items were added to the list
+     *
+     * @param aStartIndex First item that was added (inserted)
+     * @param aEndIndex Last item that was added (inserted)
+     * @param aList List that this callback relates to 
+     */
+    virtual void HandleItemAddedL(TInt aStartIndex, TInt aEndIndex,
+                                  MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification that media object is now available for an item 
+     *
+     * @param Index of the item 
+     * @param aList List that this callback relates to 
+     */
+    virtual void HandleMediaL(TInt aListIndex, MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification that media items were removed from the list
+     *
+     * @param aStartIndex First item that was removed 
+     * @param aEndIndex Last item that was removed
+     * @param aList List that this callback relates to 
+     */
+    virtual void HandleItemRemovedL(TInt aStartIndex, TInt aEndIndex,
+                                    MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification that media items were changed
+     *
+     * @param aItemIndexes Indexes of items that were changed
+     * @param aList List that this callback relates to 
+     */
+    virtual void HandleItemModifiedL(const RArray<TInt>& aItemIndexes, 
+                                     MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification that attributes are available
+     *
+     * @param aItemIndex Index of the item for which attributes are available
+     * @param aAttributes Array of attributes that have become available
+     * @param aList List that this callback relates to 
+     */
+    virtual void HandleAttributesAvailableL(TInt aItemIndex, 
+                                            const RArray<TMPXAttribute>& aAttributes, 
+                                            MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification that focus has moved
+     *
+     * @param aType the direction of the focus change
+     * @param aNewIndex the new index after the focus change
+     * @param aOldIndex the old index before the focus change
+     * @param aList List that this callback relates to
+     */
+    virtual void HandleFocusChangedL(NGlxListDefs::TFocusChangeType aType, 
+                                     TInt aNewIndex, TInt aOldIndex, 
+                                     MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification that an item has been selected/deselected
+     *
+     * @param aIndex Index of the item that has been selected/deselected
+     * @param aSelected Boolean to indicate selection/deselection
+     * @param aList List that the selection relates to
+     */
+    virtual void HandleItemSelectedL(TInt aIndex, TBool aSelected, 
+                                     MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification from the collection
+     * E.g. Items added/modified/deleted and progress notifications
+     *
+     * @param aMessage Message notification from the collection
+     * @param aList List that the notification relates to
+     */
+    virtual void HandleMessageL(const CMPXMessage& aMessage, 
+                                MGlxMediaList* aList) = 0;
+
+    /**
+     * Notification of an error from the collection
+     *
+     * @param aError Error code
+     */
+    virtual void HandleError(TInt aError) { (void)aError; };
+
+    /**
+     * Handle completion of a asynchronous command
+     * @todo: All clients should implement this callback
+     *
+     * @param aSessionId session id of the client that issued the command
+     * @param aCommandResult result of the command, NULL if error
+     * @param aError error code
+     * @param aList List that the notification relates to 
+     */
+    virtual void HandleCommandCompleteL(TAny* /*aSessionId*/, 
+                                        CMPXCommand* /*aCommandResult*/, 
+                                        TInt /*aError*/, 
+                                        MGlxMediaList* /*aList*/) {};
+
+    /**
+     * Handle media list population.
+     *
+     * @param aList List that the notification relates to 
+     */                                   
+    virtual void HandlePopulatedL(MGlxMediaList* /*aList*/) {};
+    };
+
+#endif // M_GLXMEDIALISTOBSERVER_H
+