qstmgesturelib/recognisers/qstmpangesturerecogniser.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 04 May 2010 12:39:35 +0300
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Revision: 201015 Kit: 201018
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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 "qstmpangesturerecogniser.h"
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#include "qstmgenericsimplegesture.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_PanGestureRecogniser::QStm_PanGestureRecogniser(QStm_GestureListenerIf* listener) : 
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		                         QStm_GestureRecogniser(listener)
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{
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}
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QStm_PanGestureRecogniser::~QStm_PanGestureRecogniser()
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{
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}
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QStm_GestureRecognitionState QStm_PanGestureRecogniser::recognise(int numOfActiveStreams,
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                                    QStm_GestureEngineIf* pge)
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{
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    QStm_GestureRecognitionState 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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        const qstmUiEventEngine::QStm_UiEventIf* puie = pge->getUiEvents(0);
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        int countOfEvents = puie->countOfEvents() ;
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        qstmUiEventEngine::QStm_UiEventCode eventCode = puie->code() ;
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        if (countOfEvents > 1) { // do we have more than one event in the stream?
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            // Then look at the events to see if they are suitable for us
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            // should we check that all of the events are targeted to our window?
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            // currently we only check if the last one is for us and is EMove, then we pan if the speed is OK
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            if (m_loggingenabled) {
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            	LOGARG("QStm_PanGestureRecogniser: Got: numer of events %d, event code %d", countOfEvents, eventCode);
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            }
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            if (puie->target() == m_powner &&
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                eventCode == qstmUiEventEngine::EMove) { // The last one is move in our window
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                float speed = puie->speed();
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                if (m_loggingenabled) {
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                    LOGARG("QStm_PanGestureRecogniser: Pan: num %d code %d, speed %f, pos(%d, %d), prev pos(%d, %d)", 
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                            countOfEvents, eventCode, speed, puie->currentXY().x(), puie->currentXY().y(), 
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                            puie->previousXY().x(), puie->previousXY().y());
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                }
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                // It is pan gesture in our window, handle it, if the speed is inside limits
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                if (speed > m_panningspeedlow && speed < m_panningspeedhigh) {
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                    using qstmUiEventEngine::QStm_UiEventSpeed;
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                    state = EGestureActive;
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                    QStm_UiEventSpeed speedIf(speed, puie->speedVec());
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                    // Panning gesture
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                    qstmGesture::QStm_DirectionalGesture pgest(
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                                    KUid,
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                                    puie->currentXY(),
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                                    puie->previousXY(),
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                                    &speedIf,
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                                    m_loggingenabled);
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                    pgest.setTarget(puie->target());
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                    // Call the listener to inform that a Pan has occurred...
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                    m_listener->gestureEnter(pgest);
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                }
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            }
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            else if (eventCode == qstmUiEventEngine::ERelease) {
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            	LOGARG("QStm_PanGestureRecogniser::recognise: (0x%x) eventCode == ERelease", this);
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            }
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        }
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    }
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    m_state = state;
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    return state;
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}
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void QStm_PanGestureRecogniser::release(QStm_GestureEngineIf* pge)
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{
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	if (m_loggingenabled) {
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	    LOGARG("QStm_PanGestureRecogniser: release (0x%x)", this);	
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	}
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	const qstmUiEventEngine::QStm_UiEventIf* puie = pge->getUiEvents(0);
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    using qstmUiEventEngine::QStm_UiEventSpeed;
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    QStm_UiEventSpeed speedIf(puie->speed(), puie->speedVec());
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    qstmGesture::QStm_DirectionalGesture pgest(
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                    KUid,
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                    puie->currentXY(),
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                    puie->previousXY(),
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                    &speedIf,
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                    m_loggingenabled);
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	pgest.setTarget(puie->target());
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    m_listener->gestureExit(pgest) ;
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    m_state = ENotMyGesture;
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}
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void QStm_PanGestureRecogniser::setPanningSpeedLow(float aSpeed)/* __SOFTFP */
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{
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    m_panningspeedlow = aSpeed ;
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}
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void QStm_PanGestureRecogniser::setPanningSpeedHigh(float aSpeed) /*__SOFTFP */
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{
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    m_panningspeedhigh = aSpeed ;
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}
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   122