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:  Gesture recognition utilities

    15 *

    16 */

    17 

    18 #include "utils.h"

    19 

    20 #include <coemain.h> // for CCoeEnv

    21 #include <eikappui.h>  // for CEikAppUi

    22 

    23 #include "gesturedefs.h"

    24 

    25 namespace GestureHelper

    26     {

    27     /** @return the longer edge of the size */

    28     inline TInt LongerEdge( const TSize& aSize ) 

    29         {

    30         return Max( aSize.iHeight, aSize.iWidth );

    31         }

    32     

    33     // for documentation, see header file

    34     TRect ToleranceRect( const TPoint& aCenterPoint ) 

    35         {

    36         TSize screenSize = static_cast<CEikAppUi*>( CCoeEnv::Static()->AppUi() )

    37             ->ApplicationRect().Size(); 

    38         // multiplication has to be done first, to avoid rounding integer to 0 with division

    39         int toleranceLength = ( KGestureTolerancePercent * LongerEdge( screenSize ) ) / 100; 

    40         TRect toleranceRect( aCenterPoint, TSize() );

    41         // grow by the tolerance length, while keeping the center point

    42         toleranceRect.Shrink( -toleranceLength, -toleranceLength );

    43         return toleranceRect;

    44         }

    45  

    46      // for documentation, see header file

    47     TRect ToleranceRect( const TPoint& aCenterPoint, MGestureEvent::TAxis aRelevantAxis ) 

    48         {

    49         TRect toleranceRect = ToleranceRect(aCenterPoint);

    50 

    51 		TSize screenSize = static_cast<CEikAppUi*>( CCoeEnv::Static()->AppUi() )

    52             ->ApplicationRect().Size();

    53             

    54 		if(aRelevantAxis == MGestureEvent::EAxisHorizontal)

    55 			{

    56 			toleranceRect.iTl.iY = 0;

    57         	toleranceRect.iBr.iY = screenSize.iHeight;	

    58 			}

    59 		else if(aRelevantAxis == MGestureEvent::EAxisVertical)

    60 			{

    61 			toleranceRect.iTl.iX = 0;

    62         	toleranceRect.iBr.iX = screenSize.iWidth;	

    63 			}

    64 		else // EAxisBoth

    65 			{

    66 			// nothing to be done	

    67 			}                   

    68 

    69         return toleranceRect;

    70         }

    71            

    72     } // namespace GestureHelper