/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  Algorithm to recognise gesture from a stream of points

*

*/

#ifndef _GESTURERECOGNISER_H_

#define _GESTURERECOGNISER_H_

#include <e32std.h>

#include "rt_gestureobserver.h"

namespace RT_GestureHelper

{

class TPointArray;

/**

 * Note: Not a static class or a function pointer, just to make it sligthly 

 * easier to replace it with a heavier implementation

 */

NONSHARABLE_CLASS( TGestureRecogniser )

    {

public:

    /** 

     * Translates points into a gesture code

     * @param aPoints Points that form the gestures. Client is not required 

     *                to pass in repeated points (sequential points that are 

     *                almost in the same place)

     * @param aIsHolding ETrue if gesture was ended at pointer being held down at same position

     *                   EFalse if gesture ended at pointer being released 

     * @return recognised gesture id or EUnknownGesture

     */

    TGestureCode GestureCode( const TPointArray& aPoints ) const;

    };

} // namespace GestureHelper

#endif // _GESTURERECOGNISER_H_