class CAlfEffectObserver;

class CXnAppUiAdapter;

#define KGfxContextAddWidget                TUid::Uid( 0x102750F4 )

#define KGfxContextRemoveWidget             TUid::Uid( 0x102750F4 )

#define KGfxContextActivateNextView         TUid::Uid( 0x102750F1 )

#define KGfxContextActivatePrevView         TUid::Uid( 0x102750F2 )

#define KGfxContextBgAppear                 TUid::Uid( 0x102750F3 )

#define KGfxControlActionAppear             3

#define KGfxControlActionDisappear          4

#define KGfxControlActionAppearPrt          3

#define KGfxControlActionDisappearPrt       5

#define KGfxControlActionAppearLsc          6

#define KGfxControlActionDisappearLsc       7

#define KGfxContextOpenWallpaperView        1007

#define KGfxContextCloseWallpaperView       1008

    TXnEffect() 

        : iNode( NULL ), iState( 0 ), iId( 0 ), iExplicitEnd( EFalse )

        {        

        }

    TBool iExplicitEnd;

NONSHARABLE_CLASS( CXnEffectManager ) : public CTimer    

    static CXnEffectManager* NewL( CXnAppUiAdapter& aAppUiAdapter );

private:

    // from CTimer

    /**

     * @see CTimer

     */

    void RunL();

    /**

     * Begin handling of fullscreen effect.

     * 

     * @since S60 5.2 

     * @param aId effect id

     */

    void BeginFullscreenEffectL( TInt aId );

    /**

     * Ends fullscreen effect.

     * 

     * @since S60 5.2 

     * @param aId effect id

     */

    void EndFullscreenEffect( TInt aId );

    /**

     * Begin view change effect

     * 

     * @since S60 5.2

     * @param aThis Active view

     * @param aOther View to activate

     * @param aEffect Effect uid 

     * @return ETrue of effect is started, EFalse otherwise

     */    

    TBool BeginActivateViewEffect( const CXnViewData& aThis, 

        const CXnViewData& aOther, TUid aEffect );

    /**

     * End view change effect

     * 

     * @since S60 5.2

     * @param aThis Active view

     * @param aOther View to activate

     * @param aEffect Effect uid 

     */        

    void EndActivateViewEffect( const CXnViewData& aThis, 

        const CXnViewData& aOther, TUid aEffect );

    /**

     * Begins background appear effect

     * 

     * @since S60 5.2

     * @param aBg Background control

     * @param aWaitActiveEffect ETrue if active effect is checked, EFalse otherwise

     */

    void BgAppearEffect( CCoeControl* aBg, TBool aWaitActiveEffect = EFalse );

    /**

     * Checks if effect is active for control

     * 

     * @since S60 5.2

     * @param aControl Control to check

     * @return ETrue if active, EFalse otherwise

     */

    TBool ControlEffectActive( const CCoeControl* aControl ) const;

    /** 

     * Updates iLandscape flag

     * 

     * @since S60 5.2

     */

    void OrientationChanged();

    /** 

     * Cleanup control effect

     * 

     * @since S60 5.2

     */    

    void CleanupControlEffect();

     * Waits active effects to complete

     * @param aInterval Interval in micro seconds to wait active effects to complete     

     * @return ETrue if no active effects ongoing when function returns, EFalse otherwise 

    TBool WaitActiveEffect( TInt aInterval );

    CXnEffectManager( CXnAppUiAdapter& aAppUiAdapter );

    /** Effect observer, owned */

    CAlfEffectObserver* iObserver;

    /** AppUi, not owned */

    CXnAppUiAdapter& iAppUiAdapter;

    RArray< TXnEffect > iEffects;

    /** List of controls in current effect, not owned */

    RPointerArray< CCoeControl > iControls;

    /** Effect group id */

    TInt iGroupId;    

    /** Flag to indicate whether background effect is started */

    TBool iBgEffect;

    /** Orientation */

    TBool iLandscape;