1 /*

     2 * Copyright (c) 2008 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:  Array of points

    15 *

    16 */

    17 

    18 

    19 #ifndef _POINTARRAY_H_

    20 #define _POINTARRAY_H_

    21 

    22 #include <e32std.h>

    23 

    24 namespace RT_GestureHelper

    25 {

    26 

    27 /** 

    28  * Represents a single point given at certain time

    29  */

    30 struct TPointEntry 

    31     {

    32     /** constructor */

    33     inline TPointEntry( const TPoint& aPos, const TTime& aTime ) 

    34             : iPos( aPos ), iTime( aTime )

    35         {

    36         }

    37     

    38     TPoint iPos;

    39     TTime iTime;

    40     };

    41     

    42 /**

    43  * Array of points that wraps another point array

    44  * The purpose of this class is to allow deriving classes to override []

    45  * and in that member function adjust the point, e.g., by setting one

    46  * axis to always a constant value. This allows providing a sequence of

    47  * points to the recogniser in which the other axis is ignored.

    48  */

    49 NONSHARABLE_CLASS( TPointArray )

    50     {

    51 public:

    52     /** 

    53      * @param aPoints points array to wrap (and filter)

    54      */

    55     TPointArray( const RArray< TPointEntry >& aPoints ); 

    56     /** @returns length of the array */

    57     TInt Count() const;

    58     /** 

    59      * @returns a filtered point at aIndex. Default implementation same

    60      *          as Raw(...)

    61      * virtual so deriving classes can modify the point (e.g., filter one axis)

    62      */

    63     virtual TPoint operator[]( TInt aIndex ) const;

    64     /** @returns an raw, non-filtered point at aIndex */

    65     TPoint Raw( TInt aIndex ) const;

    66     

    67 private:

    68     const RArray< TPointEntry >& iPoints;

    69     };

    70 

    71 } // namespace GestureHelper

    72 

    73 #endif // _POINTARRAY_H_