/*

* 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:  Application class

 *

*/

#ifndef TSPHYSICS_H

#define TSPHYSICS_H

#include <e32base.h>

#include <e32std.h>

class MAknPhysicsObserver;

/**

 * Simple physics for grid animation

 */

class CTsPhysics : public CActive

    {

public:

    /*

     * Destructor

     */

    ~CTsPhysics();

    /**

     * Two-phased constructor.

     */

    static CTsPhysics* NewL( MAknPhysicsObserver& aObserver );

    /**

     * Two-phased constructor.

     */

    static CTsPhysics* NewLC( MAknPhysicsObserver& aObserver );

public: // New functions

    /**

     * Starts animation

     * 

     * @param  aDrag       next drag point

     * @param  aStartTime  when animation should be started

     */

    void StartPhysics( const TPoint& aTarget );

    /**

     * Stops animation

     */

    void StopPhysics();

private:

    /**

     * C++ constructor

     */

    CTsPhysics( MAknPhysicsObserver& aObserver );

    /**

     * Second-phase constructor

     */

    void ConstructL();

private: // From CActive

    /**

     * Handles completion

     */

    void RunL();

    /**

     * Called when cancelled

     */

    void DoCancel();

    /**

     * Hanldes error

     */

    TInt RunError( TInt aError );

private: // New functions

    /**

     * Calculates animation steps

     */

    TInt CalculateAnimationSteps( const TPoint& aTarget );

private:

    enum TPhysicsStatus

        {

        EStopped,

        ERunning,

        EFinished

        };

    /**

     * Observer

     */

    MAknPhysicsObserver& iObserver;

    /**

     * Animation timer

     */

    RTimer iTimer;

    /**

     * Animation state

     */

    TPhysicsStatus iPhysicsState;

    /**

     * Controls animation refresh rate

     */

    TTimeIntervalMicroSeconds32 iAnimationTickTime;

    /**

     * Animation ticks counter

     */

    TInt iAnimationTicks;

    /**

     * Offset of how much view should be moved

     */

    RArray<TPoint> iAnimationSteps;

    };

#endif // TSPHYSICS_H