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/****************************************************************************
**
** Copyright (C) 2020 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QPROPERTY_P_H
#define QPROPERTY_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp. This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//
#include <qglobal.h>
#include <qvarlengtharray.h>
#include "qproperty.h"
QT_BEGIN_NAMESPACE
// This is a helper "namespace"
struct Q_AUTOTEST_EXPORT QPropertyBasePointer
{
const QtPrivate::QPropertyBase *ptr = nullptr;
QPropertyBindingPrivate *bindingPtr() const;
void addObserver(QPropertyObserver *observer);
void setFirstObserver(QPropertyObserver *observer);
QPropertyObserverPointer firstObserver() const;
int observerCount() const;
template <typename T>
static QPropertyBasePointer get(QProperty<T> &property)
{
return QPropertyBasePointer{&property.d.priv};
}
};
// This is a helper "namespace"
struct QPropertyObserverPointer
{
QPropertyObserver *ptr = nullptr;
void unlink();
void setBindingToMarkDirty(QPropertyBindingPrivate *binding);
void setChangeHandler(void (*changeHandler)(QPropertyObserver*));
void notify(QPropertyBindingPrivate *triggeringBinding);
void observeProperty(QPropertyBasePointer property);
void prependToBinding(QPropertyBindingPrivate *binding);
explicit operator bool() const { return ptr != nullptr; }
QPropertyObserverPointer nextObserver() const { return {ptr->next.data()}; }
};
class QPropertyBindingErrorPrivate : public QSharedData
{
public:
QPropertyBindingError::Type type = QPropertyBindingError::NoError;
QString description;
QPropertyBindingSourceLocation location;
};
struct BindingEvaluationState
{
BindingEvaluationState(QPropertyBindingPrivate *binding);
~BindingEvaluationState();
QPropertyBindingPrivate *binding;
QVarLengthArray<QPropertyObserver, 4> *dependencyObservers = nullptr;
BindingEvaluationState *previousState = nullptr;
};
QT_END_NAMESPACE
#endif // QPROPERTY_P_H
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