QPropertyChangeHandler Class

template <typename Functor> class QPropertyChangeHandler

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

Header: #include <QPropertyChangeHandler>
CMake: find_package(Qt6 COMPONENTS Core REQUIRED)
target_link_libraries(mytarget PRIVATE Qt6::Core)
qmake: QT += core
Inherits: QPropertyObserver

Detailed Description

QPropertyChangeHandler<PropertyType, 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.

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