--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/harvester/composerplugins/imagecomposer/inc/locationrelationobserver.h Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,136 @@
+/*
+* Copyright (c) 2006-2009 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: Image Composer's listener for changes in db location relations
+ *
+*/
+
+
+#ifndef LOCATIONRELATIONOBSERVER_H
+#define LOCATIONRELATIONOBSERVER_H
+
+#include "mdeharvestersession.h"
+#include "mdequery.h"
+
+// forward declarations
+class CMdENamespaceDef;
+class CComposerImagePlugin;
+
+/**
+ * CLocationRelationObserver
+ *
+ */
+class CLocationRelationObserver : public CBase, public MMdERelationObserver, public MMdEQueryObserver
+ {
+public:
+ // Constructors and destructor
+
+ /**
+ * Destructor.
+ */
+ ~CLocationRelationObserver();
+
+ /**
+ * Two-phased constructor.
+ */
+ static CLocationRelationObserver* NewL( CMdESession* aSession, CComposerImagePlugin* aComposer );
+
+protected:
+
+ /**
+ * Called to notify the observer that new relations has been
+ * added/modified/removed in the metadata engine database.
+ *
+ * @param aSession session
+ * @param aType defines if relation was added/modified/remove
+ * @param aRelationIdArray IDs of relations
+ */
+
+ void HandleRelationNotification(CMdESession& aSession,
+ TObserverNotificationType aType,
+ const RArray<TItemId>& aRelationIdArray);
+
+ /**
+ * Called to notify the observer that new results have been received
+ * in the query.
+ * From MMdEQueryObserver.
+ *
+ * @param aQuery Query instance that received new results.
+ * @param aFirstNewItemIndex Index of the first new item that was added
+ * to the result item array.
+ * @param aNewItemCount Number of items added to the result item
+ * array.
+ *
+ * No implementation needed!
+ */
+ void HandleQueryNewResults( CMdEQuery& /*aQuery*/,
+ TInt /*aFirstNewItemIndex*/, TInt /*aNewItemCount*/ );
+
+ /**
+ * Handle query results.
+ * From MMdEQueryObserver.
+ *
+ * @param aQuery Query instance that received new results.
+ * @param aError Error code.
+ */
+ void HandleQueryCompleted( CMdEQuery& aQuery, TInt aError );
+
+private:
+
+ /**
+ * Constructor for performing 1st stage construction
+ */
+ CLocationRelationObserver();
+
+ /**
+ * EPOC default constructor for performing 2nd stage construction
+ */
+ void ConstructL( CMdESession* aSession, CComposerImagePlugin* aComposer );
+
+ /**
+ * Query the related image object ids from MdE database.
+ * @param aObjectIdArray Array of Location object database ids.
+ */
+ void QueryRelationItemsL( );
+
+
+private:
+
+ /**
+ * Pointer to default Mde namespace.
+ */
+ CMdENamespaceDef* iDefaultNamespace;
+
+ /**
+ * Pointer to Mde session.
+ */
+ CMdESession* iSession;
+
+ /**
+ * Pointer to a composer.
+ */
+ CComposerImagePlugin* iComposer;
+
+ /**
+ * MdE query object to use for querying relations
+ */
+ CMdERelationQuery* iQuery;
+
+ TBool iQueryStarted;
+
+ RArray<TItemId> iRelationIdArray;
+
+ };
+
+#endif // LOCATIONRELATIONOBSERVER_H
+