/*

* Copyright (c) 2010 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: 

*

*/

#include "qstmupdowngesturerecogniser.h"

#include "qstmgenericsimplegesture.h"

#include "qstmuievent_if.h"

#include "qstmutils.h"

#include "qstmfilelogger.h"

using namespace qstmGesture ;

QStm_UpdownGestureRecogniser::QStm_UpdownGestureRecogniser(QStm_GestureListenerIf* listener) : 

		                                       QStm_GestureRecogniser(listener)

{

}

QStm_UpdownGestureRecogniser::~QStm_UpdownGestureRecogniser()

{

}

QStm_GestureRecognitionState QStm_UpdownGestureRecogniser::recognise(int numOfActiveStreams,

                                         QStm_GestureEngineIf* pge)

{

    QStm_GestureRecognitionState state = m_state = ENotMyGesture;

    // Check if we are enabled or not

    if (!m_gestureEnabled) return state ;

    // Look at the events to see if it looks like a tap or double tap

    if (numOfActiveStreams == 1) {

        // Then look at the event stream, it has to be tap and release

        const qstmUiEventEngine::QStm_UiEventIf* puie = pge->getUiEvents(0);

        int countOfEvents = puie->countOfEvents() ;

        qstmUiEventEngine::QStm_UiEventCode eventCode = puie->code() ;

        if (countOfEvents > 1) {// do we have more than one event in the stream?

            // Then look at the events to see if they are suitable for us

            // should we check that all of the events are targeted to our window?

            // currently we only check if the last one is for us and is EMove, then check if |x| > |y|

            if (puie->target() == m_powner &&

                    eventCode == qstmUiEventEngine::EMove) { // The last one is move in our window

            	if (m_loggingenabled) {

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

                }

                // Is it leftright gesture in our window?

                const QPoint& p = puie->currentXY() ;

                QPoint dp = p - puie->previousXY() ;

                // check that the Y movement is bigger

                if (ABS(dp.x()) < ABS(dp.y())) {

                    state = EGestureActive;

                    qstmGesture::QStm_GenericSimpleGesture pgest(KUid, p, dp.y(), puie) ;

                    // Give the gesture a name

                    pgest.setName(QString("Updown")) ;

                    pgest.setTarget(puie->target());

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

                    m_listener->gestureEnter(pgest) ;

                }

            }

        }

    }

    m_state = state;

    return state;

}

void QStm_UpdownGestureRecogniser::release(QStm_GestureEngineIf* pge)

{

	const qstmUiEventEngine::QStm_UiEventIf* puie = pge->getUiEvents(0);

    using qstmUiEventEngine::QStm_UiEventSpeed;

    const QPoint& p = puie->currentXY() ;

    QPoint dp = p - puie->previousXY() ;

    qstmGesture::QStm_GenericSimpleGesture pgest(KUid, p, dp.y(), puie) ;

    pgest.setTarget(puie->target());

    m_listener->gestureExit(pgest) ;

    m_state = ENotMyGesture;

}