diff -r 000000000000 -r 4e91876724a2 photosgallery/viewframework/medialists/inc/mglxfetchcontext.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/medialists/inc/mglxfetchcontext.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,84 @@
+/*
+* 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 and attribute fetch context
+*
+*/
+
+
+
+
+#ifndef M_GLXFETCHCONTEXT_H
+#define M_GLXFETCHCONTEXT_H
+
+#include <e32base.h>
+#include "glxmediaid.h"
+
+#include <mpxattributespecs.h>
+
+class MGlxMediaList;
+class TMPXAttribute;
+
+/**
+ *  MGlxFetchContext
+ *
+ *  Interface that allows clients to define which media items should be 
+ *  retrieved and which properties for them
+ *
+ *  @lib none
+ */
+class MGlxFetchContext 
+    {
+public:
+    /**
+     * Specifies which attributes should be fetched for a particular item
+     * in the list.
+     * @param aList the list for which the request relates to
+     * @return in aItemIndices the list indices for which the attributes should be requested for
+     *         if no items requiring attributes, returns an empty array.
+     *         Caller should make sure the array is empty before calling.
+     * @return in aAttributes the attributes that should be retrieved
+     * @return in aDetailedSpecs a new detailed specification object 
+     *		   regarding the attributes or NULL. Caller must set the 
+     *		   parameter to NULL.
+     * @return TInt number of items with outstanding requests.
+     *     KErrGeneral if there are no more requests but there are outstanding errors.
+     */
+    virtual TInt AttributeRequestL(const MGlxMediaList* aList, RArray<TInt>& aItemIndices, 
+    	RArray<TMPXAttribute>& aAttributes, CMPXAttributeSpecs*& aDetailedSpecs) const = 0;
+    
+    /**
+     * Lists all attributes that a required for a particular item in the list.
+     * Ignores whether the attributes have been loaded or not. This function 
+     * is used for garbage collection, in order to know if an attribute is 
+     * still in use. 
+     * @param aList the list for which the call relates to
+     * @param aListIndex the index in the list of the particular item
+     * @return in aAttributes all attributes that this context requires.
+     *		   if no attributes are required, returns the array as empty.
+     *	       Caller must make sure the array is empty before calling.
+     */
+    virtual void AllAttributesL(const MGlxMediaList* aList, TInt aListIndex, 
+    	RArray<TMPXAttribute>& aAttributes) const = 0;
+
+    /**
+     * Provides the number of items with currently outstanding requests
+     *
+     * @param aList the list for which the call relates to
+     * @return TInt number of items with outstanding requests.
+     *     KErrGeneral if there are no more requests but there are outstanding errors.
+     */
+    virtual TInt RequestCountL(const MGlxMediaList* aList) const = 0;
+    };
+
+#endif // M_GLXFETCHCONTEXT_H
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