qstmgesturelib/recognisers/qstmtouchgesturerecogniser.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 04 May 2010 12:39:35 +0300
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/*
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#include "qstmgenericsimplegesture.h"
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#include "qstmtouchgesturerecogniser.h"
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#include "qstmuievent_if.h"
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#include <qstmfilelogger.h>
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using namespace qstmGesture ;
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QStm_TouchGestureRecogniser::QStm_TouchGestureRecogniser(QStm_GestureListenerIf* listener) :
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                                      QStm_GestureRecogniser(listener)
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{
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}
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QStm_TouchGestureRecogniser::~QStm_TouchGestureRecogniser()
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{
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}
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/*!
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 * Touch gesture recogniser.  Note that this one never owns the gesture, it just calls
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 * the callback if it detects ETouch inside the area being watched.
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 * There could be also check for the target window?
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 */
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QStm_GestureRecognitionState QStm_TouchGestureRecogniser::recognise(int numOfActiveStreams,
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                                    QStm_GestureEngineIf* pge)
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{
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    QStm_GestureRecognitionState state = m_state = ENotMyGesture;
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    // Check if we are enabled or not
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    if (!m_gestureEnabled) return state ;
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    if (numOfActiveStreams == 1) {
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        // Then look at the event stream, it has to be EHold
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        const qstmUiEventEngine::QStm_UiEventIf* puie = pge->getUiEvents(0);
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        qstmUiEventEngine::QStm_UiEventCode eventCode = puie->code();
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        if (m_loggingenabled) {
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            LOGARG("QStm_TouchGestureRecogniser: 0x%x num %d code %d", this, puie->countOfEvents(), eventCode);
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        }
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        if (eventCode == qstmUiEventEngine::ETouch) {
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            const QPoint& tapPoint = puie->currentXY();
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            if (m_loggingenabled) {
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                LOGARG("QStm_TouchGestureRecogniser: 0x%x ETouch: num %d at %d, %d", 
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                		this, puie->countOfEvents(), tapPoint.x(), tapPoint.y());
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                LOGARG("QStm_TouchGestureRecogniser: area, %d,%d %d,%d", m_area.x(), 
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                		m_area.y(), m_area.x() + m_area.width(), m_area.y() + m_area.height());
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            }
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            bool produceGesture ;
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            if(!m_area.isEmpty()) {
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                produceGesture = m_area.contains(tapPoint);
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                if(produceGesture && m_loggingenabled) {
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                    LOGARG("QStm_TouchGestureRecogniser: HIT area (%d,%d) in %d,%d %d,%d", 
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                    		tapPoint.x(), tapPoint.y(), m_area.y(), m_area.x() + m_area.width(), m_area.y() + m_area.height());
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                }
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            }
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            else {
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                produceGesture = (m_powner == puie->target()); // no area defined, touch detected in the window
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            }
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            if (produceGesture) {
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                // state = EGestureActive ; do not take ownership, all gestures anyway start with ETouch
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                // issue the touch gesture
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                qstmGesture::QStm_GenericSimpleGesture pgest(KUid, tapPoint);
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                pgest.setTarget(puie->target());
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                // Call the listener to inform that a touch has occurred...
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                m_listener->gestureEnter(pgest);
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            }
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        }
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    }
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    return state;
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}
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void QStm_TouchGestureRecogniser::release(QStm_GestureEngineIf* /*ge*/)
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{
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    if (m_loggingenabled) {
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        LOGARG("QStm_TouchGestureRecogniser: 0x%x release", this);
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    }
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}
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void QStm_TouchGestureRecogniser::setArea(const QRect& theArea)
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{
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    m_area = theArea ;
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    if (m_loggingenabled) {
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        LOGARG("QStm_TouchGestureRecogniser: area, %d,%d %d,%d", 
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        		m_area.y(), m_area.x() + m_area.width(), m_area.y() + m_area.height());
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    }
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}