diff options
Diffstat (limited to 'examples/statemachine')
-rw-r--r-- | examples/statemachine/factorial/main.cpp | 64 |
1 files changed, 38 insertions, 26 deletions
diff --git a/examples/statemachine/factorial/main.cpp b/examples/statemachine/factorial/main.cpp index 2b63690..ae5928f 100644 --- a/examples/statemachine/factorial/main.cpp +++ b/examples/statemachine/factorial/main.cpp @@ -48,6 +48,7 @@ #include <qfinalstate.h> #endif +//! [0] class Factorial : public QObject { Q_OBJECT @@ -55,10 +56,8 @@ class Factorial : public QObject Q_PROPERTY(int fac READ fac WRITE setFac) public: Factorial(QObject *parent = 0) - : QObject(parent) + : QObject(parent), m_x(-1), m_fac(1) { - m_fac = 1; - m_x = -1; } int x() const @@ -71,7 +70,7 @@ public: if (x == m_x) return; m_x = x; - emit xChanged(); + emit xChanged(x); } int fac() const @@ -85,28 +84,34 @@ public: } Q_SIGNALS: - void xChanged(); + void xChanged(int value); private: int m_x; int m_fac; }; +//! [0] +//! [1] class FactorialLoopTransition : public QSignalTransition { public: FactorialLoopTransition(Factorial *fact) - : QSignalTransition(fact, SIGNAL(xChanged())), m_fact(fact) + : QSignalTransition(fact, SIGNAL(xChanged(int))), m_fact(fact) {} - virtual bool eventTest(QEvent *) const + virtual bool eventTest(QEvent *e) const { - return m_fact->property("x").toInt() > 1; + if (!QSignalTransition::eventTest(e)) + return false; + QSignalEvent *se = static_cast<QSignalEvent*>(e); + return se->arguments().at(0).toInt() > 1; } - virtual void onTransition(QEvent *) + virtual void onTransition(QEvent *e) { - int x = m_fact->property("x").toInt(); + QSignalEvent *se = static_cast<QSignalEvent*>(e); + int x = se->arguments().at(0).toInt(); int fac = m_fact->property("fac").toInt(); m_fact->setProperty("fac", x * fac); m_fact->setProperty("x", x - 1); @@ -115,17 +120,22 @@ public: private: Factorial *m_fact; }; +//! [1] +//! [2] class FactorialDoneTransition : public QSignalTransition { public: FactorialDoneTransition(Factorial *fact) - : QSignalTransition(fact, SIGNAL(xChanged())), m_fact(fact) + : QSignalTransition(fact, SIGNAL(xChanged(int))), m_fact(fact) {} - virtual bool eventTest(QEvent *) const + virtual bool eventTest(QEvent *e) const { - return m_fact->property("x").toInt() <= 1; + if (!QSignalTransition::eventTest(e)) + return false; + QSignalEvent *se = static_cast<QSignalEvent*>(e); + return se->arguments().at(0).toInt() <= 1; } virtual void onTransition(QEvent *) @@ -136,35 +146,37 @@ public: private: Factorial *m_fact; }; +//! [2] +//! [3] int main(int argc, char **argv) { QCoreApplication app(argc, argv); - Factorial factorial; - QStateMachine machine; +//! [3] - QState *computing = new QState(machine.rootState()); - computing->addTransition(new FactorialLoopTransition(&factorial)); +//! [4] + QState *compute = new QState(machine.rootState()); + compute->assignProperty(&factorial, "fac", 1); + compute->assignProperty(&factorial, "x", 6); + compute->addTransition(new FactorialLoopTransition(&factorial)); +//! [4] +//! [5] QFinalState *done = new QFinalState(machine.rootState()); FactorialDoneTransition *doneTransition = new FactorialDoneTransition(&factorial); doneTransition->setTargetState(done); - computing->addTransition(doneTransition); - - QState *initialize = new QState(machine.rootState()); - initialize->assignProperty(&factorial, "x", 6); - FactorialLoopTransition *enterLoopTransition = new FactorialLoopTransition(&factorial); - enterLoopTransition->setTargetState(computing); - initialize->addTransition(enterLoopTransition); + compute->addTransition(doneTransition); +//! [5] +//! [6] + machine.setInitialState(compute); QObject::connect(&machine, SIGNAL(finished()), &app, SLOT(quit())); - - machine.setInitialState(initialize); machine.start(); return app.exec(); } +//! [6] #include "main.moc" |