/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:  Gesture recognition utilities

*

*/

#include "utils.h"

#include <coemain.h> // for CCoeEnv

#include <eikappui.h>  // for CEikAppUi

#include "gesturedefs.h"

namespace GestureHelper

    {

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

    inline TInt LongerEdge( const TSize& aSize ) 

        {

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

        }

    // for documentation, see header file

    TRect ToleranceRect( const TPoint& aCenterPoint ) 

        {

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

            ->ApplicationRect().Size(); 

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

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

        TRect toleranceRect( aCenterPoint, TSize() );

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

        toleranceRect.Shrink( -toleranceLength, -toleranceLength );

        return toleranceRect;

        }

     // for documentation, see header file

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

        {

        TRect toleranceRect = ToleranceRect(aCenterPoint);

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

            ->ApplicationRect().Size();

		if(aRelevantAxis == MGestureEvent::EAxisHorizontal)

			{

			toleranceRect.iTl.iY = 0;

        	toleranceRect.iBr.iY = screenSize.iHeight;	

			}

		else if(aRelevantAxis == MGestureEvent::EAxisVertical)

			{

			toleranceRect.iTl.iX = 0;

        	toleranceRect.iBr.iX = screenSize.iWidth;	

			}

		else // EAxisBoth

			{

			// nothing to be done	

			}                   

        return toleranceRect;

        }

    } // namespace GestureHelper