/*

* Copyright (c) 2009 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: 

*

*/

/*

 * gestureeventfilter.cpp

 *

 *  Created on: Jan 22, 2009

 *      Author: tyutyuni

 */

#include "gesturedefs.h"

#include "gestureeventfilter.h"

using namespace RT_GestureHelper;

CGestureEventFilter::CGestureEventFilter(TInt aTapSize):iTapSize(aTapSize)

    {

    }

CGestureEventFilter::~CGestureEventFilter()

    {

    }

TBool CGestureEventFilter::FilterDrag(const TPointerEvent& aPointerEvent, TInt& aReason)

    {

    TTime now;

    now.HomeTime();

    return FilterDrag(aPointerEvent, now, aReason);

    }

TBool CGestureEventFilter::FilterDrag(const TPointerEvent& aPointerEvent, TTime& eventTime, TInt& aReason)

    {

    TBool filtered = EFalse;

    aReason = EFilteredNoReason;

    switch (aPointerEvent.iType)

        {

        case TPointerEvent::EButton1Down:

            {

            iIsTouchDown = ETrue;

            iTouchDownTime = iLastEventTime;

            iTouchDownPos = aPointerEvent.iPosition;

            break;

            }

        case TPointerEvent::EDrag:

            {

            if (iIsTouchDown)

                {

                TPoint delta = aPointerEvent.iPosition - iTouchDownPos;

                filtered = (Abs(delta.iX) <= iTapSize && Abs(delta.iY) <= iTapSize);

                aReason = (filtered) ? EFilteredBySize : EFilteredNoReason;

                }

            if (!filtered)

                {

                filtered = (eventTime.MicroSecondsFrom(iLastEventTime) < KMinTimeBetweenDrags);

                aReason = (filtered) ? EFilteredByTime : EFilteredNoReason;

                }

            if (!filtered)

                {

                iLastEventTime = eventTime;

                }

            iIsTouchDown = filtered;

            break;

            }

        case TPointerEvent::EButton1Up:

            {

            iIsTouchDown = EFalse;

            break;

            }

        }

    return filtered;

    }