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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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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 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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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 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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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 <QtCore> |
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43 #include <stdio.h> |
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44 |
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45 //! [0] |
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46 class PingEvent : public QEvent |
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47 { |
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48 public: |
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49 PingEvent() : QEvent(QEvent::Type(QEvent::User+2)) |
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50 {} |
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51 }; |
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52 |
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53 class PongEvent : public QEvent |
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54 { |
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55 public: |
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56 PongEvent() : QEvent(QEvent::Type(QEvent::User+3)) |
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57 {} |
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58 }; |
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59 //! [0] |
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60 |
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61 //! [1] |
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62 class Pinger : public QState |
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63 { |
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64 public: |
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65 Pinger(QState *parent) |
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66 : QState(parent) {} |
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67 |
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68 protected: |
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69 virtual void onEntry(QEvent *) |
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70 { |
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71 machine()->postEvent(new PingEvent()); |
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72 fprintf(stdout, "ping?\n"); |
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73 } |
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74 }; |
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75 //! [1] |
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76 |
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77 //! [3] |
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78 class PongTransition : public QAbstractTransition |
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79 { |
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80 public: |
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81 PongTransition() {} |
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82 |
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83 protected: |
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84 virtual bool eventTest(QEvent *e) { |
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85 return (e->type() == QEvent::User+3); |
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86 } |
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87 virtual void onTransition(QEvent *) |
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88 { |
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89 machine()->postDelayedEvent(new PingEvent(), 500); |
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90 fprintf(stdout, "ping?\n"); |
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91 } |
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92 }; |
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93 //! [3] |
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94 |
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95 //! [2] |
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96 class PingTransition : public QAbstractTransition |
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97 { |
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98 public: |
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99 PingTransition() {} |
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100 |
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101 protected: |
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102 virtual bool eventTest(QEvent *e) { |
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103 return (e->type() == QEvent::User+2); |
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104 } |
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105 virtual void onTransition(QEvent *) |
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106 { |
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107 machine()->postDelayedEvent(new PongEvent(), 500); |
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108 fprintf(stdout, "pong!\n"); |
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109 } |
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110 }; |
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111 //! [2] |
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112 |
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113 //! [4] |
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114 int main(int argc, char **argv) |
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115 { |
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116 QCoreApplication app(argc, argv); |
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117 |
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118 QStateMachine machine; |
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119 QState *group = new QState(QState::ParallelStates); |
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120 group->setObjectName("group"); |
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121 //! [4] |
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122 |
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123 //! [5] |
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124 Pinger *pinger = new Pinger(group); |
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125 pinger->setObjectName("pinger"); |
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126 pinger->addTransition(new PongTransition()); |
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127 |
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128 QState *ponger = new QState(group); |
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129 ponger->setObjectName("ponger"); |
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130 ponger->addTransition(new PingTransition()); |
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131 //! [5] |
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132 |
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133 //! [6] |
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134 machine.addState(group); |
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135 machine.setInitialState(group); |
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136 machine.start(); |
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137 |
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138 return app.exec(); |
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139 } |
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140 //! [6] |