\inmodule QtCore More...

#include <qproperty.h>

Inheritance diagram for QPropertyChangeHandler< Functor >:

Collaboration diagram for QPropertyChangeHandler< Functor >:

Public Member Functions
Q_NODISCARD_CTOR	QPropertyChangeHandler (Functor handler)

template<typename Property, QtPrivate::IsUntypedPropertyData< Property > = true>
Q_NODISCARD_CTOR	QPropertyChangeHandler (const Property &property, Functor handler)

Public Member Functions inherited from QPropertyObserver
constexpr	QPropertyObserver ()=default

	QPropertyObserver (QPropertyObserver &&other) noexcept

QPropertyObserver &	operator= (QPropertyObserver &&other) noexcept

	~QPropertyObserver ()

template<typename Property, QtPrivate::IsUntypedPropertyData< Property > = true>
void	setSource (const Property &property)

void	setSource (const QtPrivate::QPropertyBindingData &property)

Additional Inherited Members
Public Types inherited from QPropertyObserverBase
enum	ObserverTag { ObserverNotifiesBinding , ObserverNotifiesChangeHandler , ObserverIsPlaceholder }

Protected Types inherited from QPropertyObserverBase
using	ChangeHandler = void ()(QPropertyObserver, QUntypedPropertyData *)

Protected Member Functions inherited from QPropertyObserver
	QPropertyObserver (ChangeHandler changeHandler)

QUntypedPropertyData *	aliasedProperty () const

Detailed Description

template<typename Functor>
class QPropertyChangeHandler< Functor >

\inmodule QtCore

The QPropertyChangeHandler class controls the lifecycle of change callback installed on a QProperty.

QPropertyChangeHandler<Functor> is created when registering a callback on a QProperty to listen to changes to the property's value, using QProperty::onValueChanged and QProperty::subscribe. As long as the change handler is alive, the callback remains installed.

A handler instance can be transferred between C++ scopes using move semantics.

Definition at line 292 of file qproperty.h.