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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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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