/*

* 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 "qstmreleasegesturerecogniser.h"

#include "qstmuievent_if.h"

#include "qstmfilelogger.h"

using namespace qstmGesture ;

QStm_ReleaseGestureRecogniser::QStm_ReleaseGestureRecogniser(QStm_GestureListenerIf* listener) :

                                 QStm_GestureRecogniser(listener)

{

}

QStm_ReleaseGestureRecogniser::~QStm_ReleaseGestureRecogniser()

{

}

/*!

 * 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?

 */

QStm_GestureRecognitionState QStm_ReleaseGestureRecogniser::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 edge scroll with one pointer

    if (numOfActiveStreams == 1) {

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

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

        int countOfEvents = puie->countOfEvents();

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

        if (m_loggingenabled) {

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

        }

        if (eventCode == qstmUiEventEngine::ERelease) {

            if (m_loggingenabled) {

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

                		this, countOfEvents, puie->currentXY().x(), puie->currentXY().y());

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

                		m_area.x(), m_area.y(), m_area.x() + m_area.width(), m_area.y() + m_area.height());

            }

            bool produceGesture ;

            if(!m_area.isEmpty())  {

                produceGesture = m_area.contains(puie->currentXY()) ;

                if(produceGesture && m_loggingenabled) {

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

                    		puie->currentXY().x(), puie->currentXY().y(), 

                    	    m_area.x(), m_area.y(), m_area.x() + m_area.width(), m_area.y() + m_area.height());

                }

            }

            else {

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

            }

            if (produceGesture) {

                // issue the release gesture using the GenericSimpleGesture

                // Give the gesture a name

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

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

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

                m_listener->gestureEnter(pgest);

            }

        }

    }

    m_state = state;

    return state;

}

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

{

    if (m_loggingenabled) {

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

    }

    m_state = ENotMyGesture;

}

void QStm_ReleaseGestureRecogniser::setArea(const QRect& theArea)

{

    m_area = theArea ;

    if (m_loggingenabled) {

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

        		m_area.x(), m_area.y(), m_area.x() + m_area.width(), m_area.y() + m_area.height());

    }

}