/*

* 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 the License "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 RT_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; 

        */

        long toleranceLength = Mm2Pixels(KFingerSize_mm) / 2;

        TRect toleranceRect( aCenterPoint, TSize() );

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

        toleranceRect.Shrink( -toleranceLength, -toleranceLength );

        return toleranceRect;

        }

    long Twips2Pixels(long twips) 

        {

        CWsScreenDevice* screen = CCoeEnv::Static()->ScreenDevice();

        TZoomFactor deviceMap(screen);

        deviceMap.SetZoomFactor(TZoomFactor::EZoomOneToOne);

        long px = deviceMap.VerticalTwipsToPixels(twips); //assuming that vertical

        return px;                                        //the same as horizontal

        }

    long Mm2Pixels(long mm) 

        {

        return Twips2Pixels(mm * KTwipsInMm); 

        }

    long Inches2Pixels(double inches) 

        {

        return Twips2Pixels(inches * KTwipsInInch); 

        }

    } // namespace GestureHelper