diff options
Diffstat (limited to 'examples/widgets/animation/stickman/lifecycle.cpp')
-rw-r--r-- | examples/widgets/animation/stickman/lifecycle.cpp | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/examples/widgets/animation/stickman/lifecycle.cpp b/examples/widgets/animation/stickman/lifecycle.cpp new file mode 100644 index 0000000000..53249ccd6f --- /dev/null +++ b/examples/widgets/animation/stickman/lifecycle.cpp @@ -0,0 +1,217 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "lifecycle.h" +#include "stickman.h" +#include "node.h" +#include "animation.h" +#include "graphicsview.h" + +#include <QtCore> +#include <QtWidgets> + +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))), m_key(key) + { + setTargetState(target); + } + + virtual bool eventTest(QEvent *e) + { + 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); + 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), "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", 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); + 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, QObject *sender, const char *signal) +{ + QState *state = makeState(m_alive, fileName); + m_alive->addTransition(new KeyPressTransition(m_keyReceiver, key, state)); + + if((sender != NULL) || (signal != NULL)) { + 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 = 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), "pos", animation.nodePos(j)); +//! [1] + + frameState->setObjectName(QString::fromLatin1("frame %0").arg(i)); + if (previousState == 0) + topLevel->setInitialState(frameState); + else +//! [2] + previousState->addTransition(previousState, SIGNAL(propertiesAssigned()), frameState); +//! [2] + + previousState = frameState; + } + + // Loop + previousState->addTransition(previousState, SIGNAL(propertiesAssigned()), topLevel->initialState()); + + return topLevel; + +} + +LifeCycle::~LifeCycle() +{ + delete m_machine; + delete m_animationGroup; +} |