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 "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 #ifndef _POINTARRAY_H_

    19 #define _POINTARRAY_H_

    20 

    21 #include <e32std.h>

    22 

    23 namespace GestureHelper

    24 {

    25 

    26 /** 

    27  * Represents a single point given at certain time

    28  */

    29 struct TPointEntry 

    30     {

    31     /** constructor */

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

    33             : iPos( aPos ), iTime( aTime )

    34         {

    35         }

    36     

    37     TPoint iPos;

    38     TTime iTime;

    39     };

    40     

    41 /**

    42  * Array of points that wraps another point array

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

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

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

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

    47  */

    48 NONSHARABLE_CLASS( TPointArray )

    49     {

    50 public:

    51     /** 

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

    53      */

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

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

    56     TInt Count() const;

    57     /** 

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

    59      *          as Raw(...)

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

    61      */

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

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

    64     TPoint Raw( TInt aIndex ) const;

    65     

    66 private:

    67     const RArray< TPointEntry >& iPoints;

    68     };

    69 

    70 } // namespace GestureHelper

    71 

    72 #endif // _POINTARRAY_H_