--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imagehandlingutilities/thumbnailmanager/thumbnailclient/inc/thumbnailrequestqueue.h	Tue Jan 26 15:18:05 2010 +0200
@@ -0,0 +1,129 @@
+/*
+* Copyright (c) 2006-2007 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:  Processor object for running thumbnail requests
+*
+*/
+
+
+#ifndef THUMBNAILREQUESTQUEUE_H
+#define THUMBNAILREQUESTQUEUE_H
+
+#include <e32base.h>
+
+#include "thumbnailmanager.h"
+
+class CThumbnailRequestActive;
+
+/**
+ *  Processor object for running queued tasks.
+ *
+ *  @since S60 v5.0
+ */
+class CThumbnailRequestQueue: public CBase
+    {
+public:
+
+    /**
+     * Two-phased constructor.
+     *
+     * @since S60 v5.0
+     * @return Instance of CThumbnailRequestQueue.
+     */
+    static CThumbnailRequestQueue* NewL();
+
+    /**
+     * Destructor
+     *
+     * @since S60 v5.0
+     */
+    virtual ~CThumbnailRequestQueue();
+
+    /**
+     * Activates next request if possible.
+     *
+     * @since S60 v5.0
+     */
+    void Process();
+    
+    /**
+     * Adds new request to the queue.
+     *
+     * @since S60 v5.0
+     * @param aRequest Request to be added to the queue.
+     */
+    void AddRequestL( CThumbnailRequestActive* aRequest );
+
+    /**
+     * Cancels request in the queue.
+     *
+     * @since S60 v5.0
+     * @param aId Request to be canceled.
+     * @return Error code.
+     */
+    TInt CancelRequest( const TThumbnailRequestId aId );
+    
+    /**
+     * Change priority of a request.
+     *
+     * @since S60 v5.0
+     * @param aId Request to be canceled.
+     * @param aNewPriority New priority.
+     * @return Error code.
+     */
+    TInt ChangePriority( const TThumbnailRequestId aId, const TInt aNewPriority );
+    
+    /**
+     * Marks request complete.
+     *
+     * @since S60 v5.0
+     */
+    void RequestComplete(CThumbnailRequestActive* aRequestAO = NULL);
+    
+    /**
+     * Removes completed requests.
+     *
+     * @since S60 v5.0
+     */
+	void RemoveCompleted(CThumbnailRequestActive* aRequestAO);
+
+private:
+
+    /**
+     * C++ default constructor
+     *
+     * @since S60 v5.0
+     * @return Instance of CThumbnailRequestQueue.
+     */
+    CThumbnailRequestQueue();
+
+    /**
+     * Symbian 2nd phase constructor can leave.
+     *
+     * @since S60 v5.0
+     */
+    void ConstructL();
+
+private:
+
+    /**
+     * Array of active objects for each pending thumbnail request.
+     */
+    RPointerArray <CThumbnailRequestActive> iRequests;
+    
+    // number of currently active requests
+    TInt iActiveRequests;
+
+};
+
+#endif // THUMBNAILREQUESTQUEUE_H