| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtCore module of the Qt Toolkit. |
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| |
| #include "lifecycle.h" |
| #include "stickman.h" |
| #include "node.h" |
| #include "animation.h" |
| #include "graphicsview.h" |
| |
| #include <QEventTransition> |
| #include <QFile> |
| #include <QParallelAnimationGroup> |
| #include <QPropertyAnimation> |
| #include <QRandomGenerator> |
| #include <QSignalTransition> |
| #include <QState> |
| #include <QStateMachine> |
| #include <QTimer> |
| |
| class KeyPressTransition: public QSignalTransition |
| { |
| public: |
| KeyPressTransition(GraphicsView *receiver, Qt::Key key) |
| : QSignalTransition(receiver, &GraphicsView::keyPressed), m_key(key) |
| { |
| } |
| KeyPressTransition(GraphicsView *receiver, Qt::Key key, QAbstractState *target) |
| : QSignalTransition(receiver, &GraphicsView::keyPressed), m_key(key) |
| { |
| setTargetState(target); |
| } |
| |
| bool eventTest(QEvent *e) override |
| { |
| if (QSignalTransition::eventTest(e)) { |
| QVariant key = static_cast<QStateMachine::SignalEvent*>(e)->arguments().at(0); |
| return (key.toInt() == int(m_key)); |
| } |
| |
| return false; |
| } |
| private: |
| Qt::Key m_key; |
| }; |
| |
| //! [4] |
| class LightningStrikesTransition: public QEventTransition |
| { |
| public: |
| LightningStrikesTransition(QAbstractState *target) |
| : QEventTransition(this, QEvent::Timer) |
| { |
| setTargetState(target); |
| startTimer(1000); |
| } |
| |
| bool eventTest(QEvent *e) override |
| { |
| return QEventTransition::eventTest(e) && QRandomGenerator::global()->bounded(50) == 0; |
| } |
| }; |
| //! [4] |
| |
| LifeCycle::LifeCycle(StickMan *stickMan, GraphicsView *keyReceiver) |
| : m_stickMan(stickMan), m_keyReceiver(keyReceiver) |
| { |
| // Create animation group to be used for all transitions |
| m_animationGroup = new QParallelAnimationGroup(); |
| const int stickManNodeCount = m_stickMan->nodeCount(); |
| for (int i = 0; i < stickManNodeCount; ++i) { |
| QPropertyAnimation *pa = new QPropertyAnimation(m_stickMan->node(i), "pos"); |
| m_animationGroup->addAnimation(pa); |
| } |
| |
| // Set up initial state graph |
| //! [3] |
| m_machine = new QStateMachine(); |
| m_machine->addDefaultAnimation(m_animationGroup); |
| //! [3] |
| |
| m_alive = new QState(m_machine); |
| m_alive->setObjectName("alive"); |
| |
| // Make it blink when lightning strikes before entering dead animation |
| QState *lightningBlink = new QState(m_machine); |
| lightningBlink->assignProperty(m_stickMan->scene(), "backgroundBrush", QColor(Qt::white)); |
| lightningBlink->assignProperty(m_stickMan, "penColor", QColor(Qt::black)); |
| lightningBlink->assignProperty(m_stickMan, "fillColor", QColor(Qt::white)); |
| lightningBlink->assignProperty(m_stickMan, "isDead", true); |
| |
| //! [5] |
| QTimer *timer = new QTimer(lightningBlink); |
| timer->setSingleShot(true); |
| timer->setInterval(100); |
| QObject::connect(lightningBlink, &QAbstractState::entered, |
| timer, QOverload<>::of(&QTimer::start)); |
| QObject::connect(lightningBlink, &QAbstractState::exited, |
| timer, &QTimer::stop); |
| //! [5] |
| |
| m_dead = new QState(m_machine); |
| m_dead->assignProperty(m_stickMan->scene(), "backgroundBrush", QColor(Qt::black)); |
| m_dead->assignProperty(m_stickMan, "penColor", QColor(Qt::white)); |
| m_dead->assignProperty(m_stickMan, "fillColor", QColor(Qt::black)); |
| m_dead->setObjectName("dead"); |
| |
| // Idle state (sets no properties) |
| m_idle = new QState(m_alive); |
| m_idle->setObjectName("idle"); |
| |
| m_alive->setInitialState(m_idle); |
| |
| // Lightning strikes at random |
| m_alive->addTransition(new LightningStrikesTransition(lightningBlink)); |
| //! [0] |
| lightningBlink->addTransition(timer, &QTimer::timeout, m_dead); |
| //! [0] |
| |
| m_machine->setInitialState(m_alive); |
| } |
| |
| void LifeCycle::setDeathAnimation(const QString &fileName) |
| { |
| QState *deathAnimation = makeState(m_dead, fileName); |
| m_dead->setInitialState(deathAnimation); |
| } |
| |
| void LifeCycle::start() |
| { |
| m_machine->start(); |
| } |
| |
| void LifeCycle::addActivity(const QString &fileName, Qt::Key key, QObject *sender, const char *signal) |
| { |
| QState *state = makeState(m_alive, fileName); |
| m_alive->addTransition(new KeyPressTransition(m_keyReceiver, key, state)); |
| |
| if (sender && signal) |
| m_alive->addTransition(sender, signal, state); |
| } |
| |
| QState *LifeCycle::makeState(QState *parentState, const QString &animationFileName) |
| { |
| QState *topLevel = new QState(parentState); |
| |
| Animation animation; |
| { |
| QFile file(animationFileName); |
| if (file.open(QIODevice::ReadOnly)) |
| animation.load(&file); |
| } |
| |
| const int frameCount = animation.totalFrames(); |
| QState *previousState = nullptr; |
| for (int i = 0; i < frameCount; ++i) { |
| animation.setCurrentFrame(i); |
| |
| //! [1] |
| QState *frameState = new QState(topLevel); |
| const int nodeCount = animation.nodeCount(); |
| for (int j = 0; j < nodeCount; ++j) |
| frameState->assignProperty(m_stickMan->node(j), "pos", animation.nodePos(j)); |
| //! [1] |
| |
| frameState->setObjectName(QString::fromLatin1("frame %0").arg(i)); |
| if (previousState == nullptr) |
| topLevel->setInitialState(frameState); |
| else |
| //! [2] |
| previousState->addTransition(previousState, &QState::propertiesAssigned, frameState); |
| //! [2] |
| |
| previousState = frameState; |
| } |
| |
| // Loop |
| previousState->addTransition(previousState, &QState::propertiesAssigned, topLevel->initialState()); |
| |
| return topLevel; |
| |
| } |
| |
| LifeCycle::~LifeCycle() |
| { |
| delete m_machine; |
| delete m_animationGroup; |
| } |