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authorKent Hansen <khansen@trolltech.com>2009-05-13 09:20:14 (GMT)
committerKent Hansen <khansen@trolltech.com>2009-05-13 09:21:02 (GMT)
commit5c7c8208c559d82e96aa7aa8c753c224d89022a2 (patch)
treed258a60e557c47853aebf9261cdb0bafdacd6213 /examples/statemachine
parent288de11968d4b71c97fc5d1a175d4c4ac7023552 (diff)
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document statemachine/factorial example
Diffstat (limited to 'examples/statemachine')
-rw-r--r--examples/statemachine/factorial/main.cpp64
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"