/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, version 2.1 of the License.

* 

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

* GNU Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with this program.  If not, 

* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".

*

* Description:

*

*/

#include "qstmgenericsimplegesture.h"

#include "qstmmaybetapgesturerecogniser.h"

#include "qstmuievent_if.h"

#include "qstmutils.h"

#include "qstmfilelogger.h"

using namespace qstmGesture ;

using namespace qstmUiEventEngine;

QStm_MaybeTapGestureRecogniser::QStm_MaybeTapGestureRecogniser(QStm_GestureListenerIf* listener) :

                                        QStm_GestureRecogniser(listener)

{

    m_powner = listener->getOwner() ;

    if (listener) {

        addTapListener(listener, m_powner) ;

    }

    m_gestureEnabled = true;

    m_numOfActiveStreams = 0;

}

QStm_MaybeTapGestureRecogniser::~QStm_MaybeTapGestureRecogniser()

{

    m_tapListeners.clear() ;

    m_tapListenerWindows.clear() ;

}

QStm_GestureRecognitionState QStm_MaybeTapGestureRecogniser::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) {

        m_numOfActiveStreams = numOfActiveStreams; 

        // 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 (m_loggingenabled) {

            LOGARG("QStm_MaybeTapGestureRecogniser: event: %s, countOfEvents: %d, code: %d", 

                   event_name(eventCode), countOfEvents, eventCode);

        }

        void* target = puie->target();

        if (countOfEvents == 2) { // Do we have touch and release in the stream, check if there are two events

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

            if (target && eventCode == qstmUiEventEngine::ERelease) {// The last one is release

                qstmUiEventEngine::QStm_UiEventIf* puieFirst = puie->previousEvent();

                if (puieFirst != NULL && 

                    (eventCode = puieFirst->code()) == qstmUiEventEngine::ETouch && // is the first one ETouch

                    isPointClose(puie->currentXY(), puie->previousXY())) { // if system failed to deliver move event between 

                	                                                       // down and up we can get tap with two points

                	                                                       // too far from each other, so check for it

                    if (m_loggingenabled) {

                        LOGARG("QStm_MaybeTapGestureRecogniser: 0x%x TAP: countOfEvents: %d, event: %s", this, countOfEvents, event_name(eventCode));

                    }

                    m_firstTapXY = puieFirst->currentXY() ;

                    m_firstTapTarget = target ;

                    m_firstTapSpeed = puie->speed() ;

                    int inx = m_tapListenerWindows.indexOf(m_firstTapTarget) ;

                    if (inx == -1) {

                        inx = 0;

                    }

                    qstmGesture::QStm_GenericSimpleGesture pgest(

                                        qstmGesture::EGestureUidMaybeTap, 

                                        m_firstTapXY, 

                                        puie->timestamp(),

                                        qstmGesture::ETapTypeSingle, 

                                        puieFirst) ; // TODO: speed is 0?

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

                                    QStm_GestureListenerIf* plistener = m_tapListeners[inx] ;

                                    plistener->gestureEnter(pgest) ;

                }

            }

        }

    }

    m_state = state;

    return state;

}

void QStm_MaybeTapGestureRecogniser::release(QStm_GestureEngineIf* /*ge*/)

{

    if (m_loggingenabled) {

        LOGARG("QStm_MaybeTapGestureRecogniser: 0x%x release, %d %d", this, m_firstTapXY.x(), m_firstTapXY.y());

    }

    m_state = ENotMyGesture;

}

void QStm_MaybeTapGestureRecogniser::enableLogging(bool loggingOn)

{

    m_loggingenabled = loggingOn;

}

void QStm_MaybeTapGestureRecogniser::setOwner(void* owner)

{

    m_powner = owner;

}

void QStm_MaybeTapGestureRecogniser::enable(bool enabled)

{

    m_gestureEnabled = enabled ;

}

bool QStm_MaybeTapGestureRecogniser::isEnabled()

{

    return m_gestureEnabled ;

}

void QStm_MaybeTapGestureRecogniser::setTapRange(int rangeInMillimetres)

{

    m_rangesizeInPixels = QStm_Utils::mm2Pixels(rangeInMillimetres) ;

}

bool QStm_MaybeTapGestureRecogniser::isPointClose(const QPoint&  firstPoint, const QPoint& secondPoint)

{

    QRect tolerance = QStm_Utils::toleranceRectPx(secondPoint, m_rangesizeInPixels) ;

    bool aretheyclose = tolerance.contains(firstPoint);

    return aretheyclose ;

}

void QStm_MaybeTapGestureRecogniser::addTapListener(QStm_GestureListenerIf* listener, void* listenerOwner)

{

    m_tapListeners.append(listener) ;

    m_tapListenerWindows.append(listenerOwner) ;

}

void QStm_MaybeTapGestureRecogniser::removeTapListener(QStm_GestureListenerIf* listener, void* /*listenerOwner*/)

{

    int inx = m_tapListeners.indexOf(listener) ;

    if(inx != -1) {

        m_tapListeners.removeAt(inx) ;

        m_tapListenerWindows.removeAt(inx) ;

    }

}