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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <private/qqmlfinalizer_p.h>
QT_BEGIN_NAMESPACE
QQmlFinalizerHook::~QQmlFinalizerHook() = default;
/*!
\class QQmlFinalizerHook
\internal
QQmlFinalizerHook is an internal interface to run code after the current toplevel
component has been completed.
At first, this might look like QQmlParserStaus' componentComplete functionality
by another name - however there is a difference. To understand it, consider the
following QML file:
\qml
import QtQuick
Item {
id: root
Rectangle {
id: rect
Rectangle { id: innerRect }
}
property Item it: Item {id: myItem }
}
\endqml
This file will instantiate 4 (sub-)components: One for each of root, rect, innerRect
and myItem. If the component gets loaded in a synchronous way, each of their
componentComplete (if existent) would run directly one after another (in a non-specified
order).
However, in the case of an asynchronous instantiation, e.g. via a loader, we might interrupt
the (sub-)component construction partway: There can be a delay between the various
componentComplete calls, and not all sub-components might have been constructed yet.
QQmlFinalizerHook::componentFinalized is instead called after all asynchronously instantiated
(sub-)components have been constructed. Notably, all bindings of those components have also
been set up.
\note While the engine does not use qobject_cast, tooling still relies on the interface
being marked as such. Thus you should always use the Q_INTERFACES macro in classes deriving
from QQmlFinalizerHook.
*/
/*!
\fn void QQmlFinalizerHook::componentFinalized()
The customization point provided by this interface. See the class description for
why it is useful and how it compares to componentComplete.
\sa QQmlParserStatus::componentComplete
*/
QT_END_NAMESPACE
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