1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtCore module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "lifecycle.h"

    43 #include "stickman.h"

    44 #include "node.h"

    45 #include "animation.h"

    46 #include "graphicsview.h"

    47 

    48 #include <QtCore>

    49 #include <QtGui>

    50 

    51 class KeyPressTransition: public QSignalTransition

    52 {

    53 public:

    54     KeyPressTransition(GraphicsView *receiver, Qt::Key key)

    55         : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)

    56     {

    57     }

    58     KeyPressTransition(GraphicsView *receiver, Qt::Key key, QAbstractState *target)

    59         : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)

    60     {

    61         setTargetState(target);

    62     }

    63 

    64     virtual bool eventTest(QEvent *e)

    65     {

    66         if (QSignalTransition::eventTest(e)) {

    67             QVariant key = static_cast<QStateMachine::SignalEvent*>(e)->arguments().at(0);

    68             return (key.toInt() == int(m_key));

    69         } 

    70 

    71         return false;

    72     }

    73 private:

    74     Qt::Key m_key;

    75 };

    76 

    77 //! [4]

    78 class LightningStrikesTransition: public QEventTransition

    79 {

    80 public:

    81     LightningStrikesTransition(QAbstractState *target)

    82         : QEventTransition(this, QEvent::Timer)

    83     {

    84         setTargetState(target);

    85         qsrand((uint)QDateTime::currentDateTime().toTime_t());

    86         startTimer(1000);

    87     }

    88 

    89     virtual bool eventTest(QEvent *e)

    90     {

    91         return QEventTransition::eventTest(e) && ((qrand() % 50) == 0);

    92     }

    93 };

    94 //! [4]

    95 

    96 LifeCycle::LifeCycle(StickMan *stickMan, GraphicsView *keyReceiver)

    97     : m_stickMan(stickMan), m_keyReceiver(keyReceiver)

    98 {

    99     // Create animation group to be used for all transitions

   100     m_animationGroup = new QParallelAnimationGroup();

   101     const int stickManNodeCount = m_stickMan->nodeCount();

   102     for (int i=0; i<stickManNodeCount; ++i) {

   103         QPropertyAnimation *pa = new QPropertyAnimation(m_stickMan->node(i), "pos");

   104         m_animationGroup->addAnimation(pa);    

   105     }

   106 

   107     // Set up intial state graph

   108 //! [3]

   109     m_machine = new QStateMachine();

   110     m_machine->addDefaultAnimation(m_animationGroup);

   111 //! [3]

   112 

   113     m_alive = new QState(m_machine);

   114     m_alive->setObjectName("alive");

   115     

   116     // Make it blink when lightning strikes before entering dead animation

   117     QState *lightningBlink = new QState(m_machine);    

   118     lightningBlink->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::white);

   119     lightningBlink->assignProperty(m_stickMan, "penColor", Qt::black);

   120     lightningBlink->assignProperty(m_stickMan, "fillColor", Qt::white);

   121     lightningBlink->assignProperty(m_stickMan, "isDead", true);

   122     

   123 //! [5]

   124     QTimer *timer = new QTimer(lightningBlink);

   125     timer->setSingleShot(true);

   126     timer->setInterval(100);

   127     QObject::connect(lightningBlink, SIGNAL(entered()), timer, SLOT(start()));

   128     QObject::connect(lightningBlink, SIGNAL(exited()), timer, SLOT(stop()));

   129 //! [5]

   130   

   131     m_dead = new QState(m_machine);

   132     m_dead->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::black);

   133     m_dead->assignProperty(m_stickMan, "penColor", Qt::white);

   134     m_dead->assignProperty(m_stickMan, "fillColor", Qt::black);

   135     m_dead->setObjectName("dead");

   136            

   137     // Idle state (sets no properties)

   138     m_idle = new QState(m_alive);

   139     m_idle->setObjectName("idle");

   140 

   141     m_alive->setInitialState(m_idle);

   142 

   143     // Lightning strikes at random

   144     m_alive->addTransition(new LightningStrikesTransition(lightningBlink));

   145 //! [0]

   146     lightningBlink->addTransition(timer, SIGNAL(timeout()), m_dead);

   147 //! [0]

   148 

   149     m_machine->setInitialState(m_alive);

   150 }

   151 

   152 void LifeCycle::setDeathAnimation(const QString &fileName)

   153 {

   154     QState *deathAnimation = makeState(m_dead, fileName);

   155     m_dead->setInitialState(deathAnimation);

   156 }

   157 

   158 void LifeCycle::start()

   159 {

   160     m_machine->start();

   161 }

   162 

   163 void LifeCycle::addActivity(const QString &fileName, Qt::Key key)

   164 {

   165     QState *state = makeState(m_alive, fileName);

   166     m_alive->addTransition(new KeyPressTransition(m_keyReceiver, key, state));

   167 }

   168 

   169 QState *LifeCycle::makeState(QState *parentState, const QString &animationFileName)

   170 {

   171     QState *topLevel = new QState(parentState);

   172     

   173     Animation animation;

   174     {

   175         QFile file(animationFileName);

   176         if (file.open(QIODevice::ReadOnly))

   177             animation.load(&file);

   178     }

   179 

   180     const int frameCount = animation.totalFrames();

   181     QState *previousState = 0;

   182     for (int i=0; i<frameCount; ++i) {

   183         animation.setCurrentFrame(i);

   184 

   185 //! [1]

   186         QState *frameState = new QState(topLevel);                       

   187         const int nodeCount = animation.nodeCount();

   188         for (int j=0; j<nodeCount; ++j)

   189             frameState->assignProperty(m_stickMan->node(j), "pos", animation.nodePos(j));

   190 //! [1]

   191 

   192         frameState->setObjectName(QString::fromLatin1("frame %0").arg(i));

   193         if (previousState == 0)

   194             topLevel->setInitialState(frameState);

   195         else

   196 //! [2]

   197             previousState->addTransition(previousState, SIGNAL(polished()), frameState);

   198 //! [2]

   199         

   200         previousState = frameState;

   201     }

   202 

   203     // Loop

   204     previousState->addTransition(previousState, SIGNAL(polished()), topLevel->initialState());

   205 

   206     return topLevel;

   207 

   208 }

   209 

   210 LifeCycle::~LifeCycle()

   211 {

   212     delete m_machine;

   213     delete m_animationGroup;

   214 }