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Diffstat (limited to 'examples/animation/stickman/lifecycle.cpp')
-rw-r--r-- | examples/animation/stickman/lifecycle.cpp | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/examples/animation/stickman/lifecycle.cpp b/examples/animation/stickman/lifecycle.cpp new file mode 100644 index 0000000..eb4ed11 --- /dev/null +++ b/examples/animation/stickman/lifecycle.cpp @@ -0,0 +1,212 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "lifecycle.h" +#include "stickman.h" +#include "node.h" +#include "animation.h" +#include "graphicsview.h" + +#include <QtCore> +#include <QtGui> + +class KeyPressTransition: public QSignalTransition +{ +public: + KeyPressTransition(GraphicsView *receiver, Qt::Key key) + : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key) + { + } + KeyPressTransition(GraphicsView *receiver, Qt::Key key, QAbstractState *target) + : QSignalTransition(receiver, SIGNAL(keyPressed(int)), QList<QAbstractState*>() << target), m_key(key) + { + } + + virtual bool eventTest(QEvent *e) + { + if (QSignalTransition::eventTest(e)) { + QVariant key = static_cast<QSignalEvent*>(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, QList<QAbstractState*>() << target) + { + qsrand((uint)QDateTime::currentDateTime().toTime_t()); + startTimer(1000); + } + + virtual bool eventTest(QEvent *e) + { + return QEventTransition::eventTest(e) && ((qrand() % 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), "position"); + m_animationGroup->addAnimation(pa); + } + + // Set up intial state graph +//! [3] + m_machine = new QStateMachine(); + m_machine->addDefaultAnimation(m_animationGroup); +//! [3] + + m_alive = new QState(m_machine->rootState()); + m_alive->setObjectName("alive"); + + // Make it blink when lightning strikes before entering dead animation + QState *lightningBlink = new QState(m_machine->rootState()); + lightningBlink->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::white); + lightningBlink->assignProperty(m_stickMan, "penColor", Qt::black); + lightningBlink->assignProperty(m_stickMan, "fillColor", Qt::white); + lightningBlink->assignProperty(m_stickMan, "isDead", true); + +//! [5] + QTimer *timer = new QTimer(lightningBlink); + timer->setSingleShot(true); + timer->setInterval(100); + QObject::connect(lightningBlink, SIGNAL(entered()), timer, SLOT(start())); + QObject::connect(lightningBlink, SIGNAL(exited()), timer, SLOT(stop())); +//! [5] + + m_dead = new QState(m_machine->rootState()); + m_dead->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::black); + m_dead->assignProperty(m_stickMan, "penColor", Qt::white); + m_dead->assignProperty(m_stickMan, "fillColor", 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, SIGNAL(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) +{ + QState *state = makeState(m_alive, fileName); + m_alive->addTransition(new KeyPressTransition(m_keyReceiver, key, 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 = 0; + 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), "position", animation.nodePos(j)); +//! [1] + + frameState->setObjectName(QString::fromLatin1("frame %0").arg(i)); + if (previousState == 0) + topLevel->setInitialState(frameState); + else +//! [2] + previousState->addTransition(previousState, SIGNAL(polished()), frameState); +//! [2] + + previousState = frameState; + } + + // Loop + previousState->addTransition(previousState, SIGNAL(polished()), topLevel->initialState()); + + return topLevel; + +} + +LifeCycle::~LifeCycle() +{ + delete m_machine; + delete m_animationGroup; +} |