Provides support for the Windows wait functions. More...

Inheritance diagram for QWinEventNotifier:

Public Signals
void	activated (HANDLE hEvent)

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

void	objectNameChanged (const QString &objectName)

Public Slots
void	setEnabled (bool enable)

Public Slots inherited from QObject
void	deleteLater ()

Public Methods
	QWinEventNotifier (HANDLE hEvent, QObject *parent=nullptr)

	QWinEventNotifier (QObject *parent=nullptr)

	~QWinEventNotifier ()

HANDLE	handle () const

bool	isEnabled () const

void	setHandle (HANDLE hEvent)

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

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)

Additional Inherited Members
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 >())

Properties inherited from QObject
	objectName

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

	QObjectList

Detailed Description

The QWinEventNotifier class provides support for the Windows Wait functions. This class makes it possible to use the wait functions on windows in a asynchronous manner. With this class, you can register a HANDLE to an event and get notification when that event becomes signalled. The state of the event is not modified in the process so if it is a manual reset event you will need to reset it after the notification.

Once you have created a event object using Windows API such as CreateEvent() or OpenEvent(), you can create an event notifier to monitor the event handle. If the event notifier is enabled, it will emit the activated() signal whenever the corresponding event object is signalled.

The setEnabled() function allows you to disable as well as enable the event notifier. It is generally advisable to explicitly enable or disable the event notifier. A disabled notifier does nothing when the event object is signalled (the same effect as not creating the event notifier). Use the isEnabled() function to determine the notifier's current status.

Finally, you can use the setHandle() function to register a new event object, and the handle() function to retrieve the event handle.

Further information: Although the class is called QWinEventNotifier, it can be used for certain other objects which are so-called synchronization objects, such as Processes, Threads, Waitable timers.

Warning: This class is only available on Windows.

Constructor & Destructor Documentation

QWinEventNotifier::QWinEventNotifier ( QObject * parent = nullptr )

explicit

Constructs an event notifier with the given parent.

QWinEventNotifier::QWinEventNotifier	(	HANDLE	hEvent,
		QObject *	parent = `nullptr`
	)

explicit

Constructs an event notifier with the given parent. It enables the notifier, and watches for the event hEvent.

The notifier is enabled by default, i.e. it emits the activated() signal whenever the corresponding event is signalled. However, it is generally advisable to explicitly enable or disable the event notifier.

See also: setEnabled(), isEnabled()

QWinEventNotifier::~QWinEventNotifier ( )

Destroys this notifier.

Method Documentation

void QWinEventNotifier::activated ( HANDLE hEvent )

signal

This signal is emitted whenever the event notifier is enabled and the corresponding HANDLE is signalled. The state of the event is not modified in the process, so if it is a manual reset event, you will need to reset it after the notification. The object is passed in the hEvent parameter.

Note: This is a private signal. It can be used in signal connections but can not be emitted by the user.

See also: handle()

bool QWinEventNotifier::event ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QObject::event()

HANDLE QWinEventNotifier::handle ( ) const

Returns the HANDLE that has been registered in the notifier.

See also: setHandle()

bool QWinEventNotifier::isEnabled ( ) const

Returns true if the notifier is enabled, otherwise returns false.

See also: setEnabled()

void QWinEventNotifier::setEnabled ( bool enable )

slot

If enable is true, the notifier is enabled, otherwise the notifier is disabled.

See also: isEnabled(), activated()

void QWinEventNotifier::setHandle ( HANDLE hEvent )

Registers the HANDLE hEvent. The old HANDLE will be automatically unregistered.

Note: The notifier will be disabled as a side effect and needs to be re-enabled.

See also: handle(), setEnabled()

Public Signals

Public Slots

Public Methods

Protected Methods

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Method Documentation