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49 | ****************************************************************************/ |
50 | |
51 | #include <QtCore> |
52 | #include <stdio.h> |
53 | |
54 | //! [0] |
55 | class PingEvent : public QEvent |
56 | { |
57 | public: |
58 | PingEvent() : QEvent(QEvent::Type(QEvent::User+2)) |
59 | {} |
60 | }; |
61 | |
62 | class PongEvent : public QEvent |
63 | { |
64 | public: |
65 | PongEvent() : QEvent(QEvent::Type(QEvent::User+3)) |
66 | {} |
67 | }; |
68 | //! [0] |
69 | |
70 | //! [1] |
71 | class Pinger : public QState |
72 | { |
73 | public: |
74 | Pinger(QState *parent) |
75 | : QState(parent) {} |
76 | |
77 | protected: |
78 | void onEntry(QEvent *) override |
79 | { |
80 | machine()->postEvent(event: new PingEvent()); |
81 | fprintf(stdout, format: "ping?\n" ); |
82 | } |
83 | }; |
84 | //! [1] |
85 | |
86 | //! [3] |
87 | class PongTransition : public QAbstractTransition |
88 | { |
89 | public: |
90 | PongTransition() {} |
91 | |
92 | protected: |
93 | bool eventTest(QEvent *e) override { |
94 | return (e->type() == QEvent::User+3); |
95 | } |
96 | void onTransition(QEvent *) override |
97 | { |
98 | machine()->postDelayedEvent(event: new PingEvent(), delay: 500); |
99 | fprintf(stdout, format: "ping?\n" ); |
100 | } |
101 | }; |
102 | //! [3] |
103 | |
104 | //! [2] |
105 | class PingTransition : public QAbstractTransition |
106 | { |
107 | public: |
108 | PingTransition() {} |
109 | |
110 | protected: |
111 | bool eventTest(QEvent *e) override { |
112 | return (e->type() == QEvent::User+2); |
113 | } |
114 | void onTransition(QEvent *) override |
115 | { |
116 | machine()->postDelayedEvent(event: new PongEvent(), delay: 500); |
117 | fprintf(stdout, format: "pong!\n" ); |
118 | } |
119 | }; |
120 | //! [2] |
121 | |
122 | //! [4] |
123 | int main(int argc, char **argv) |
124 | { |
125 | QCoreApplication app(argc, argv); |
126 | |
127 | QStateMachine machine; |
128 | QState *group = new QState(QState::ParallelStates); |
129 | group->setObjectName("group" ); |
130 | //! [4] |
131 | |
132 | //! [5] |
133 | Pinger *pinger = new Pinger(group); |
134 | pinger->setObjectName("pinger" ); |
135 | pinger->addTransition(transition: new PongTransition()); |
136 | |
137 | QState *ponger = new QState(group); |
138 | ponger->setObjectName("ponger" ); |
139 | ponger->addTransition(transition: new PingTransition()); |
140 | //! [5] |
141 | |
142 | //! [6] |
143 | machine.addState(state: group); |
144 | machine.setInitialState(group); |
145 | machine.start(); |
146 | |
147 | return app.exec(); |
148 | } |
149 | //! [6] |
150 | |