The QEventTransition class provides a QObject specific transition for events. More...

Inheritance diagram for QEventTransition:

Public Methods
	QEventTransition (QObject object, QEvent::Type type, QState sourceState=nullptr)

	QEventTransition (QState *sourceState=nullptr)

	~QEventTransition ()

QObject *	eventSource () const

QEvent::Type	eventType () const

void	setEventSource (QObject *object)

void	setEventType (QEvent::Type type)

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
	eventSource

	eventType

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 QEventTransition class provides a QObject specific transition for events. A QEventTransition object binds an event to a particular QObject. QEventTransition is part of State Machine.

QPushButton *button = ...;
QState *s1 = ...;
QState *s2 = ...;
 
// If in s1 and the button receives an Enter event, transition to s2
QEventTransition *enterTransition = new QEventTransition(button, QEvent::Enter);
enterTransition->setTargetState(s2);
s1->addTransition(enterTransition);
 
// If in s2 and the button receives an Exit event, transition back to s1
QEventTransition *leaveTransition = new QEventTransition(button, QEvent::Leave);
leaveTransition->setTargetState(s1);
s2->addTransition(leaveTransition);

Subclassing

When reimplementing eventTest() you should first call the base implementation to verify the event is a QStateMachine::WrappedEvent for the proper object and event type. Then cast the event to a QStateMachine::WrappedEvent and get the original event by calling QStateMachine::WrappedEvent::event() and perform additional checks on that object.

See also: QState::addTransition()

Constructor & Destructor Documentation

QEventTransition::QEventTransition ( QState * sourceState = nullptr )

Constructs a new QEventTransition object with the given sourceState.

QEventTransition::QEventTransition	(	QObject *	object,
		QEvent::Type	type,
		QState *	sourceState = `nullptr`
	)

Constructs a new QEventTransition object associated with events of the given type for the given object and with the given sourceState.

QEventTransition::~QEventTransition ( )

Destroys this QObject event transition.

Method Documentation

bool QEventTransition::event ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractTransition::event()

QObject * QEventTransition::eventSource ( ) const

Returns the value of the property eventSource associated with this event transition.

See also: setEventSource()

bool QEventTransition::eventTest ( QEvent * event )

overrideprotectedvirtual

Implements QAbstractTransition::eventTest()

Reimplemented in QMouseEventTransition::eventTest(), QKeyEventTransition::eventTest()

QEvent::Type QEventTransition::eventType ( ) const

Returns the value of the property eventType associated with this event transition.

See also: setEventType()

void QEventTransition::onTransition ( QEvent * event )

overrideprotectedvirtual

Implements QAbstractTransition::onTransition()

Reimplemented in QMouseEventTransition::onTransition(), QKeyEventTransition::onTransition()

void QEventTransition::setEventSource ( QObject * object )

Sets the property eventSource associated with this event transition to the given object.

See also: eventSource()

void QEventTransition::setEventType ( QEvent::Type type )

Sets the property eventType associated with this event transition to the given type.

See also: eventType()

Property Documentation

QEventTransition::eventSource

This property holds the event source this event transition is associated with.

Properties	Class Methods
read	eventSource
write	setEventSource

QEventTransition::eventType

This property holds the type of event this event transition is associated with.

Properties	Class Methods
read	eventType
write	setEventType

Public Methods

Protected Methods

Properties

Additional Inherited Members

Detailed Description

Subclassing

Constructor & Destructor Documentation

Method Documentation

Property Documentation