--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessoryservices/pluggeddisplay/pluggeddisplayengine/inc/centralrepositorywatch.h	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,177 @@
+/*
+* Copyright (c) 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: Class to watch key value changes in Central Repository.
+*
+*/
+
+
+
+#ifndef C_CENTRALREPOSITORYWATCH_H
+#define C_CENTRALREPOSITORYWATCH_H
+
+
+#include    <e32base.h>
+#include    <centralrepository.h>
+#include "centralrepositoryobserver.h"
+
+
+/**
+ *  Class to watch key value changes in Central Repository.
+ *
+ *  @code
+ *   ?good_class_usage_example(s)
+ *  @endcode
+ *
+ *  @lib none.
+ *  @since TB 9.2
+ */
+NONSHARABLE_CLASS( CCentralRepositoryWatch ): public CActive
+    {
+
+
+public:
+
+
+    /**
+    * Two-phased constructor.
+    * @param aObserver Observer's callback interface.
+    * @param aRepositoryUid Identifier of a repositor.
+    * @param aKeyId Identifier of a key.
+    */
+    static CCentralRepositoryWatch* NewL(
+            MCentralRepositoryObserver&   aObserver,
+            TUid aRepositoryUid,
+            TUint32 aKeyId
+            );
+    
+    /**
+    * Two-phased constructor.
+    * @param aObserver Observer's callback interface.
+    * @param aRepositoryUid Identifier of a repositor.
+    * @param aKeyId Identifier of a key.
+    */
+    static CCentralRepositoryWatch* NewLC(
+            MCentralRepositoryObserver&   aObserver,
+            TUid aRepositoryUid,
+            TUint32 aKeyId
+            );
+
+    /**
+    * Destructor.
+    */
+    virtual ~CCentralRepositoryWatch();
+
+    /**
+    * Watch value changes of a specified key in a specified CenRep.
+    * @param None
+    * @return void
+    */
+    void Watch();
+
+    /**
+    * Get current value of a specified key in a specified CenRep.
+    * @param aValue Reference to a variable to which current value is to be assigned.
+    * @return TInt Error code. 
+    *       KErrNone if successful, 
+    *       KErrAbort if in a transaction that has previously failed 
+    *       KErrPermissionDenied if caller fails capability check, 
+    *       KErrNotFound if the setting does not exist, 
+    *       KErrArgument if the setting exists but is not an integer, plus other system-wide error codes.
+    */
+    TInt GetCurrentValue( TInt& aValue );
+
+
+protected:
+
+    /**
+    * Active object cancellation
+    * @param None
+    * @return void
+    */
+    void DoCancel();
+
+private:
+
+
+    /**
+    * C++ default constructor.
+    * @param aObserver Observer's callback interface.
+    * @param aRepositoryId Identifier of a repositor.
+    * @param aKeyId Identifier of a key.
+    */
+    CCentralRepositoryWatch(
+            MCentralRepositoryObserver& aObserver,
+            TUid aRepositoryId,
+            TUint32 aKeyId );
+
+    /**
+    * By default Symbian OS constructor is private.
+    * @return void
+    */
+    void ConstructL(  );
+
+    /**
+    * Completion
+    * @param None
+    * @return void
+    */
+    void RunL();
+   
+    /**
+    * Error handling.
+    * @param aError Error code.
+    * @return void
+    */
+    TInt RunError( TInt aError );
+   
+    /**
+    * By default, prohibit copy constructor
+    */
+   CCentralRepositoryWatch( const CCentralRepositoryWatch& );
+
+   /**
+   * By default, prohibit assignment operator
+   */
+    CCentralRepositoryWatch& operator= ( const CCentralRepositoryWatch& );
+
+
+private: // data
+
+    /**
+     * Observer objects callback interface.
+     * Not own.
+     */
+    MCentralRepositoryObserver&   iObserver;
+
+    /**
+     * Repository pointer.
+     * Own.
+     */
+    CRepository*               iRepository;
+
+    /**
+     * Identifier of the repositor.
+     */
+    TUid                       iRepositoryUid;
+
+    /**
+     * Identifier of a key.
+     */
+    TInt32                     iKey;
+
+ 
+    };
+
+
+#endif // C_CENTRALREPOSITORYWATCH_H