/*

* 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 helper implementation

*

*/

#include "GenericSimpleGesture.h"

#include "releasegesturerecogniser.h"

#include "rt_uievent.h"

#include "filelogger.h"

using namespace stmGesture ;

_LIT8(KReleaseName, "Release");

CReleaseGestureRecogniser::CReleaseGestureRecogniser(MGestureListener* aListener) :

    CGestureRecogniser(aListener)

{

}

CReleaseGestureRecogniser* CReleaseGestureRecogniser::NewL(MGestureListener* aListener)

{

    CReleaseGestureRecogniser* self = new (ELeave) CReleaseGestureRecogniser(aListener) ;

    return self;

}

CReleaseGestureRecogniser::~CReleaseGestureRecogniser()

{

}

/*!

 * Release gesture recogniser.  Note that this one never owns the gesture, it just calls

 * the callback if it detects ERelease inside the area being watched.

 * There could be also check for the target window?

 */

TGestureRecognitionState CReleaseGestureRecogniser::recognise(int numOfActiveStreams,

        MGestureEngineIf* pge)

{

    TGestureRecognitionState state = ENotMyGesture;

    // Check if we are enabled or not

    if (!m_gestureEnabled) return state ;

    // Look at the events to see if it looks like edge scroll with one pointer

    if (numOfActiveStreams == 1)

    {

        // Then look at the event stream, it has to be EHold

        const stmUiEventEngine::MUiEvent* puie = pge->getUiEvents(0);

        if (!puie) return state;

        int countOfEvents = puie->countOfEvents();

        stmUiEventEngine::TUiEventCode eventCode = puie->Code();

        if (m_loggingenabled)

        {

            LOGARG("CReleaseGestureRecogniser: %d num %d code %d", eventCode, countOfEvents, eventCode);

        }

        if (eventCode == stmUiEventEngine::ERelease)

        {

            if (m_loggingenabled)

            {

                LOGARG("CReleaseGestureRecogniser: 0x%x ERelease: num %d code %d, %d", 

                        this, countOfEvents, puie->CurrentXY().iX, puie->CurrentXY().iY);

                LOGARG("CReleaseGestureRecogniser: area, %d,%d %d,%d", 

                        m_area.iTl.iX, m_area.iTl.iY, m_area.iBr.iX, m_area.iBr.iY);

            }

            bool produceGesture ;

            if(!m_area.IsEmpty())

            {

                produceGesture = m_area.Contains(puie->CurrentXY()) ;

                if(produceGesture && m_loggingenabled)

                {

                    LOGARG("CReleaseGestureRecogniser: HIT area (%d,%d) in %d,%d %d,%d", 

                            puie->CurrentXY().iX, puie->CurrentXY().iY, 

                            m_area.iTl.iX, m_area.iTl.iY, 

                            m_area.iBr.iX, m_area.iBr.iY);

                }

            }

            else

            {

                produceGesture = (m_powner == puie->Target()) ;  // no area defined, touch detected in the window

            }

            if (produceGesture)

            {

                state = EGestureActive ;

                // issue the release gesture using the GenericSimpleGesture

                stmGesture::TGenericSimpleGesture pgest(KUid, puie->CurrentXY());

                // Give the gesture a name

                pgest.setName(KReleaseName) ;

                // Call the listener to inform that a release has occurred...

                m_listener->gestureEnter(pgest);

            }

        }

    }

    return state;

}

void CReleaseGestureRecogniser::release(MGestureEngineIf* /*ge*/)

{

    if (m_loggingenabled)

    {

        LOGARG("CReleaseGestureRecogniser: 0x%x release", this);

    }

}

void CReleaseGestureRecogniser::setArea(const TRect& theArea)

{

    m_area = theArea ;

    if (m_loggingenabled)

    {

        LOGARG("CReleaseGestureRecogniser: area, %d,%d %d,%d", 

                m_area.iTl.iX, m_area.iTl.iY, 

                m_area.iBr.iX, m_area.iBr.iY);

    }

}