1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Algorithm to recognise gesture from a stream of points

    15 *

    16 */

    17 

    18 #ifndef _GESTURERECOGNISER_H_

    19 #define _GESTURERECOGNISER_H_

    20 

    21 #include <e32std.h>

    22 #include <rt_gestureobserver.h>

    23 

    24 namespace RT_GestureHelper

    25 {

    26 

    27 class TPointArray;

    28 

    29 /**

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

    31  * easier to replace it with a heavier implementation

    32  */

    33 NONSHARABLE_CLASS( TGestureRecogniser )

    34     {

    35 public:

    36     /** 

    37      * Translates points into a gesture code

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

    39      *                to pass in repeated points (sequential points that are 

    40      *                almost in the same place)

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

    42      *                   EFalse if gesture ended at pointer being released 

    43      * @return recognised gesture id or EUnknownGesture

    44      */

    45     TGestureCode GestureCode( const TPointArray& aPoints ) const;

    46     };

    47     

    48 } // namespace GestureHelper

    49 

    50 #endif // _GESTURERECOGNISER_H_