/****************************************************************************+
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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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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtCore module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "lifecycle.h"+
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#include "stickman.h"+
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#include "node.h"+
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#include "animation.h"+
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#include "graphicsview.h"+
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+
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#include <QtCore>+
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#include <QtGui>+
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+
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class KeyPressTransition: public QSignalTransition+
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{+
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public:+
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    KeyPressTransition(GraphicsView *receiver, Qt::Key key)+
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        : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)+
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    {+
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    }+
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    KeyPressTransition(GraphicsView *receiver, Qt::Key key, QAbstractState *target)+
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        : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)+
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    {+
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        setTargetState(target);+
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    }+
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+
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    virtual bool eventTest(QEvent *e)+
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    {+
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        if (QSignalTransition::eventTest(e)) {+
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            QVariant key = static_cast<QStateMachine::SignalEvent*>(e)->arguments().at(0);+
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            return (key.toInt() == int(m_key));+
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        } +
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+
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        return false;+
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    }+
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private:+
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    Qt::Key m_key;+
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};+
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+
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//! [4]+
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class LightningStrikesTransition: public QEventTransition+
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{+
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public:+
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    LightningStrikesTransition(QAbstractState *target)+
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        : QEventTransition(this, QEvent::Timer)+
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    {+
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        setTargetState(target);+
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        qsrand((uint)QDateTime::currentDateTime().toTime_t());+
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        startTimer(1000);+
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    }+
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+
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    virtual bool eventTest(QEvent *e)+
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    {+
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        return QEventTransition::eventTest(e) && ((qrand() % 50) == 0);+
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    }+
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};+
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//! [4]+
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+
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LifeCycle::LifeCycle(StickMan *stickMan, GraphicsView *keyReceiver)+
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    : m_stickMan(stickMan), m_keyReceiver(keyReceiver)+
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{+
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    // Create animation group to be used for all transitions+
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    m_animationGroup = new QParallelAnimationGroup();+
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    const int stickManNodeCount = m_stickMan->nodeCount();+
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    for (int i=0; i<stickManNodeCount; ++i) {+
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        QPropertyAnimation *pa = new QPropertyAnimation(m_stickMan->node(i), "pos");+
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        m_animationGroup->addAnimation(pa);    +
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    }+
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+
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    // Set up intial state graph+
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//! [3]+
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    m_machine = new QStateMachine();+
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    m_machine->addDefaultAnimation(m_animationGroup);+
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//! [3]+
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+
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    m_alive = new QState(m_machine);+
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    m_alive->setObjectName("alive");+
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    +
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    // Make it blink when lightning strikes before entering dead animation+
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    QState *lightningBlink = new QState(m_machine);    +
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    lightningBlink->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::white);+
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    lightningBlink->assignProperty(m_stickMan, "penColor", Qt::black);+
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    lightningBlink->assignProperty(m_stickMan, "fillColor", Qt::white);+
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    lightningBlink->assignProperty(m_stickMan, "isDead", true);+
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    +
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//! [5]+
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    QTimer *timer = new QTimer(lightningBlink);+
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    timer->setSingleShot(true);+
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    timer->setInterval(100);+
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    QObject::connect(lightningBlink, SIGNAL(entered()), timer, SLOT(start()));+
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    QObject::connect(lightningBlink, SIGNAL(exited()), timer, SLOT(stop()));+
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//! [5]+
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  +
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    m_dead = new QState(m_machine);+
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    m_dead->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::black);+
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    m_dead->assignProperty(m_stickMan, "penColor", Qt::white);+
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    m_dead->assignProperty(m_stickMan, "fillColor", Qt::black);+
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    m_dead->setObjectName("dead");+
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           +
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    // Idle state (sets no properties)+
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    m_idle = new QState(m_alive);+
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    m_idle->setObjectName("idle");+
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+
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    m_alive->setInitialState(m_idle);+
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+
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    // Lightning strikes at random+
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    m_alive->addTransition(new LightningStrikesTransition(lightningBlink));+
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//! [0]+
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    lightningBlink->addTransition(timer, SIGNAL(timeout()), m_dead);+
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//! [0]+
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+
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    m_machine->setInitialState(m_alive);+
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}+
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+
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void LifeCycle::setDeathAnimation(const QString &fileName)+
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{+
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    QState *deathAnimation = makeState(m_dead, fileName);+
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    m_dead->setInitialState(deathAnimation);+
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}+
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+
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void LifeCycle::start()+
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{+
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    m_machine->start();+
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}+
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+
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void LifeCycle::addActivity(const QString &fileName, Qt::Key key)+
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{+
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    QState *state = makeState(m_alive, fileName);+
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    m_alive->addTransition(new KeyPressTransition(m_keyReceiver, key, state));+
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}+
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+
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QState *LifeCycle::makeState(QState *parentState, const QString &animationFileName)+
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{+
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    QState *topLevel = new QState(parentState);+
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    +
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    Animation animation;+
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    {+
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        QFile file(animationFileName);+
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        if (file.open(QIODevice::ReadOnly))+
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            animation.load(&file);+
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    }+
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+
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    const int frameCount = animation.totalFrames();+
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    QState *previousState = 0;+
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    for (int i=0; i<frameCount; ++i) {+
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        animation.setCurrentFrame(i);+
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+
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//! [1]+
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        QState *frameState = new QState(topLevel);                       +
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        const int nodeCount = animation.nodeCount();+
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        for (int j=0; j<nodeCount; ++j)+
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            frameState->assignProperty(m_stickMan->node(j), "pos", animation.nodePos(j));+
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//! [1]+
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+
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        frameState->setObjectName(QString::fromLatin1("frame %0").arg(i));+
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        if (previousState == 0)+
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            topLevel->setInitialState(frameState);+
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        else+
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//! [2]+
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            previousState->addTransition(previousState, SIGNAL(propertiesAssigned()), frameState);+
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//! [2]+
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        +
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        previousState = frameState;+
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    }+
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+
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    // Loop+
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    previousState->addTransition(previousState, SIGNAL(propertiesAssigned()), topLevel->initialState());+
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+
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    return topLevel;+
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+
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}+
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+
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LifeCycle::~LifeCycle()+
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{+
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    delete m_machine;+
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    delete m_animationGroup;+
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}+
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