1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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4 | ** All rights reserved.
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5 | ** Contact: Nokia Corporation ([email protected])
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6 | **
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7 | ** This file is part of the QtCore module of the Qt Toolkit.
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8 | **
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9 | ** $QT_BEGIN_LICENSE:LGPL$
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10 | ** Commercial Usage
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11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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12 | ** accordance with the Qt Commercial License Agreement provided with the
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13 | ** Software or, alternatively, in accordance with the terms contained in
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14 | ** a written agreement between you and Nokia.
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15 | **
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16 | ** GNU Lesser General Public License Usage
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17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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18 | ** General Public License version 2.1 as published by the Free Software
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19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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20 | ** packaging of this file. Please review the following information to
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21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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23 | **
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24 | ** In addition, as a special exception, Nokia gives you certain additional
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25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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27 | **
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28 | ** GNU General Public License Usage
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29 | ** Alternatively, this file may be used under the terms of the GNU
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30 | ** General Public License version 3.0 as published by the Free Software
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31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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32 | ** packaging of this file. Please review the following information to
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33 | ** ensure the GNU General Public License version 3.0 requirements will be
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34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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35 | **
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36 | ** If you have questions regarding the use of this file, please contact
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37 | ** Nokia at [email protected].
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38 | ** $QT_END_LICENSE$
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39 | **
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40 | ****************************************************************************/
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41 |
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42 | #include "lifecycle.h"
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43 | #include "stickman.h"
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44 | #include "node.h"
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45 | #include "animation.h"
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46 | #include "graphicsview.h"
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47 |
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48 | #include <QtCore>
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49 | #include <QtGui>
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50 |
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51 | class KeyPressTransition: public QSignalTransition
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52 | {
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53 | public:
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54 | KeyPressTransition(GraphicsView *receiver, Qt::Key key)
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55 | : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)
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56 | {
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57 | }
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58 | KeyPressTransition(GraphicsView *receiver, Qt::Key key, QAbstractState *target)
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59 | : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)
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60 | {
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61 | setTargetState(target);
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62 | }
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63 |
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64 | virtual bool eventTest(QEvent *e)
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65 | {
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66 | if (QSignalTransition::eventTest(e)) {
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67 | QVariant key = static_cast<QStateMachine::SignalEvent*>(e)->arguments().at(0);
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68 | return (key.toInt() == int(m_key));
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69 | }
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70 |
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71 | return false;
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72 | }
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73 | private:
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74 | Qt::Key m_key;
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75 | };
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76 |
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77 | //! [4]
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78 | class LightningStrikesTransition: public QEventTransition
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79 | {
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80 | public:
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81 | LightningStrikesTransition(QAbstractState *target)
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82 | : QEventTransition(this, QEvent::Timer)
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83 | {
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84 | setTargetState(target);
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85 | qsrand((uint)QDateTime::currentDateTime().toTime_t());
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86 | startTimer(1000);
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87 | }
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88 |
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89 | virtual bool eventTest(QEvent *e)
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90 | {
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91 | return QEventTransition::eventTest(e) && ((qrand() % 50) == 0);
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92 | }
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93 | };
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94 | //! [4]
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95 |
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96 | LifeCycle::LifeCycle(StickMan *stickMan, GraphicsView *keyReceiver)
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97 | : m_stickMan(stickMan), m_keyReceiver(keyReceiver)
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98 | {
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99 | // Create animation group to be used for all transitions
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100 | m_animationGroup = new QParallelAnimationGroup();
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101 | const int stickManNodeCount = m_stickMan->nodeCount();
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102 | for (int i=0; i<stickManNodeCount; ++i) {
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103 | QPropertyAnimation *pa = new QPropertyAnimation(m_stickMan->node(i), "pos");
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104 | m_animationGroup->addAnimation(pa);
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105 | }
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106 |
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107 | // Set up intial state graph
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108 | //! [3]
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109 | m_machine = new QStateMachine();
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110 | m_machine->addDefaultAnimation(m_animationGroup);
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111 | //! [3]
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112 |
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113 | m_alive = new QState(m_machine);
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114 | m_alive->setObjectName("alive");
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115 |
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116 | // Make it blink when lightning strikes before entering dead animation
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117 | QState *lightningBlink = new QState(m_machine);
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118 | lightningBlink->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::white);
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119 | lightningBlink->assignProperty(m_stickMan, "penColor", Qt::black);
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120 | lightningBlink->assignProperty(m_stickMan, "fillColor", Qt::white);
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121 | lightningBlink->assignProperty(m_stickMan, "isDead", true);
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122 |
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123 | //! [5]
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124 | QTimer *timer = new QTimer(lightningBlink);
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125 | timer->setSingleShot(true);
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126 | timer->setInterval(100);
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127 | QObject::connect(lightningBlink, SIGNAL(entered()), timer, SLOT(start()));
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128 | QObject::connect(lightningBlink, SIGNAL(exited()), timer, SLOT(stop()));
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129 | //! [5]
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130 |
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131 | m_dead = new QState(m_machine);
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132 | m_dead->assignProperty(m_stickMan->scene(), "backgroundBrush", Qt::black);
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133 | m_dead->assignProperty(m_stickMan, "penColor", Qt::white);
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134 | m_dead->assignProperty(m_stickMan, "fillColor", Qt::black);
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135 | m_dead->setObjectName("dead");
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136 |
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137 | // Idle state (sets no properties)
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138 | m_idle = new QState(m_alive);
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139 | m_idle->setObjectName("idle");
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140 |
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141 | m_alive->setInitialState(m_idle);
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142 |
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143 | // Lightning strikes at random
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144 | m_alive->addTransition(new LightningStrikesTransition(lightningBlink));
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145 | //! [0]
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146 | lightningBlink->addTransition(timer, SIGNAL(timeout()), m_dead);
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147 | //! [0]
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148 |
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149 | m_machine->setInitialState(m_alive);
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150 | }
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151 |
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152 | void LifeCycle::setDeathAnimation(const QString &fileName)
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153 | {
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154 | QState *deathAnimation = makeState(m_dead, fileName);
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155 | m_dead->setInitialState(deathAnimation);
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156 | }
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157 |
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158 | void LifeCycle::start()
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159 | {
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160 | m_machine->start();
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161 | }
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162 |
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163 | void LifeCycle::addActivity(const QString &fileName, Qt::Key key)
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164 | {
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165 | QState *state = makeState(m_alive, fileName);
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166 | m_alive->addTransition(new KeyPressTransition(m_keyReceiver, key, state));
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167 | }
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168 |
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169 | QState *LifeCycle::makeState(QState *parentState, const QString &animationFileName)
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170 | {
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171 | QState *topLevel = new QState(parentState);
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172 |
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173 | Animation animation;
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174 | {
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175 | QFile file(animationFileName);
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176 | if (file.open(QIODevice::ReadOnly))
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177 | animation.load(&file);
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178 | }
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179 |
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180 | const int frameCount = animation.totalFrames();
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181 | QState *previousState = 0;
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182 | for (int i=0; i<frameCount; ++i) {
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183 | animation.setCurrentFrame(i);
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184 |
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185 | //! [1]
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186 | QState *frameState = new QState(topLevel);
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187 | const int nodeCount = animation.nodeCount();
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188 | for (int j=0; j<nodeCount; ++j)
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189 | frameState->assignProperty(m_stickMan->node(j), "pos", animation.nodePos(j));
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190 | //! [1]
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191 |
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192 | frameState->setObjectName(QString::fromLatin1("frame %0").arg(i));
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193 | if (previousState == 0)
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194 | topLevel->setInitialState(frameState);
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195 | else
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196 | //! [2]
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197 | previousState->addTransition(previousState, SIGNAL(propertiesAssigned()), frameState);
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198 | //! [2]
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199 |
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200 | previousState = frameState;
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201 | }
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202 |
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203 | // Loop
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204 | previousState->addTransition(previousState, SIGNAL(propertiesAssigned()), topLevel->initialState());
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205 |
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206 | return topLevel;
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207 |
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208 | }
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209 |
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210 | LifeCycle::~LifeCycle()
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211 | {
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212 | delete m_machine;
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213 | delete m_animationGroup;
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214 | }
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