The QSignalTransition class provides a transition based on a signal. More...

Inheritance diagram for QSignalTransition:

Public Methods
template<class SignalClass , class... SignalArgs>
	QSignalTransition (QObject sender, void (SignalClass::signal)(SignalArgs...), QState *sourceState=nullptr)

	QSignalTransition (QState *sourceState=nullptr)

	~QSignalTransition ()

const QObject *	senderObject () const

void	setSenderObject (const QObject *sender)

Public Methods inherited from QAbstractTransition
	QAbstractTransition (QState *sourceState=nullptr)

virtual	~QAbstractTransition ()

void	addAnimation (QAbstractAnimation *animation)

QList< QAbstractAnimation * >	animations () const

QStateMachine *	machine () const

void	removeAnimation (QAbstractAnimation *animation)

void	setTargetState (QAbstractState *target)

void	setTargetStates (const QList< QAbstractState * > &targets)

void	setTransitionType (TransitionType type)

QState *	sourceState () const

QAbstractState *	targetState () const

QList< QAbstractState * >	targetStates () const

TransitionType	transitionType () const

Public Methods inherited from QObject
	QObject (QObject *parent=nullptr)

	~QObject ()

bool	blockSignals (bool block)

const QList< QObject * > &	children () const

bool	connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QString >	dynamicPropertyNames () const

virtual bool	eventFilter (QObject watched, QEvent event)

template<typename T >
T	findChild (const QString &childName=QString ()) const

template<class T >
QList< T >	findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<class T >
QList< T >	findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

bool	inherits (const QString &className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

QObject *	parent () const

template<class T = QVariant>
T	property (const QString &name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const QString &name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

QThread *	thread () const

Protected Methods
bool	event (QEvent *event) override

bool	eventTest (QEvent *event) override

void	onTransition (QEvent *event) override

Protected Methods inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signalMethod) const

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signalMethod) const

bool	isSignalConnected (const QMetaMethod &signalMethod) const

int	receivers (const QString &signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Properties
	senderObject

Properties inherited from QAbstractTransition
	sourceState

	targetState

	targetStates

	transitionType

Properties inherited from QObject
	objectName

Additional Inherited Members
Public Types inherited from QAbstractTransition
enum	TransitionType

Public Signals inherited from QAbstractTransition
void	targetStateChanged ()

void	targetStatesChanged ()

void	triggered ()

Public Signals inherited from QObject
void	destroyed (QObject *obj=nullptr)

void	objectNameChanged (const QString &objectName)

Public Slots inherited from QObject
void	deleteLater ()

Static Public Methods inherited from QObject
static bool	connect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

static bool	connect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())

static bool	connect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, std::nullptr_t, const QObject receiver, std::nullptr_t)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...))

template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)

static QMetaObject &	staticMetaObject ()

static QString	tr (const char text, const char comment=nullptr, std::optional< int > numArg=std::optional< int >())

Related Functions inherited from QObject
T	qobject_cast (QObject *object)

	QObjectList

Detailed Description

The QSignalTransition class provides a transition based on a CopperSpice signal.

Typically you would use the overload of QState::addTransition() that takes a sender and signal as arguments, rather than creating QSignalTransition objects directly. QSignalTransition is part of the State Machine.

You can subclass QSignalTransition and reimplement eventTest() to make a signal transition conditional; the event object passed to eventTest() will be a QStateMachine::SignalEvent object.

class CheckedTransition : public QSignalTransition {
   public:
     CheckedTransition(QCheckBox *check)
        : QSignalTransition(check, SIGNAL(stateChanged(int))) {}
 
   protected:
     bool eventTest(QEvent *e) {
        if (! QSignalTransition::eventTest(e)) {
           return false;
        }
 
        QStateMachine::SignalEvent *se = static_cast<QStateMachine::SignalEvent*>(e);
        return (se->arguments().at(0).toInt() == Qt::Checked);
     }
 };
 
 ...
 
 QCheckBox *check = new QCheckBox();
 check->setTristate(true);
 
 QState *s1 = new QState();
 QState *s2 = new QState();
 
 CheckedTransition *t1 = new CheckedTransition(check);
 t1->setTargetState(s2);
 s1->addTransition(t1);

Constructor & Destructor Documentation

QSignalTransition::QSignalTransition ( QState * sourceState = nullptr )

Constructs a new signal transition with the given sourceState.

template<class SignalClass , class... SignalArgs>

QSignalTransition::QSignalTransition	(	QObject *	sender,
		void (SignalClass::*)(SignalArgs...)	signal,
		QState *	sourceState = `nullptr`
	)

Constructs a new signal transition associated with the given signal of the given sender and with the given sourceState.

QSignalTransition::~QSignalTransition ( )

Destroys this signal transition.

Method Documentation

bool QSignalTransition::event ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractTransition::event()

bool QSignalTransition::eventTest ( QEvent * event )

overrideprotectedvirtual

The default implementation returns true if the event is a QStateMachine::SignalEvent object and the event's sender and signal index match this transition, and returns false otherwise.

Implements QAbstractTransition::eventTest()

void QSignalTransition::onTransition ( QEvent * event )

overrideprotectedvirtual

Implements QAbstractTransition::onTransition()

const QObject * QSignalTransition::senderObject ( ) const

Returns the value of the property senderObject associated with this signal transition.

See also: setSenderObject()

void QSignalTransition::setSenderObject ( const QObject * sender )

Sets the property senderObject associated with this signal transition to sender.

See also: senderObject()

Property Documentation

QSignalTransition::senderObject

This property holds the sender object that this signal transition is associated with.

Properties	Class Methods
read	senderObject
write	setSenderObject
notify	senderObjectChanged

Public Methods

Protected Methods

Properties

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Method Documentation

Property Documentation