298 NONSHARABLE_CLASS(CAlfEffectObserver): public CBase

   299     {

   300 public:

   301     

   302     class MAlfEffectObserver

   303         {

   304         public:    

   305         /** bit field */    

   306         enum{

   307             EAlfEffectStarted = 0x1,

   308             EAlfEffectComplete = 0x2

   309             };    

   310         virtual void HandleEffectCallback(TInt aType, TInt aHandle, TInt aStatus) = 0;

   311         };

   312     

   313     IMPORT_C static CAlfEffectObserver* NewL();

   314     IMPORT_C ~CAlfEffectObserver();

   315 

   316      /**

   317      * Asks the number of active effects

   318      * @return error code or number of active effects (>= 0).

   319      */    

   320     IMPORT_C TInt ActiveEffectsCount();

   321 

   322      /**

   323      * Subscribe callback for a handle

   324      * @leave system wide error code

   325      */    

   326     IMPORT_C void SubscribeCallbackL(MAlfEffectObserver* aObserver, TInt aHandle, TInt aType = MAlfEffectObserver::EAlfEffectComplete );

   327     

   328 private:

   329     CAlfEffectObserver();

   330     class CAlfEffectObserverData;

   331     CAlfEffectObserverData* iData;

   332     };

   333