/****************************************************************************
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** Copyright (C) 2015 The Qt Company Ltd.
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
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****************************************************************************/

#ifndef QQUICKSTYLE_P_H
#define QQUICKSTYLE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtQml/qqml.h>
#include <QtCore/qlist.h>
#include <QtCore/qobject.h>
#include <QtCore/qpointer.h>
#include <QtCore/qsharedpointer.h>
#include <QtQuick/private/qquickitemchangelistener_p.h>

QT_BEGIN_NAMESPACE

class QSettings;

class QQuickStyle : public QObject, public QQuickItemChangeListener
{
    Q_OBJECT

public:
    explicit QQuickStyle(QObject *parent = Q_NULLPTR);
    ~QQuickStyle();

    static QSharedPointer<QSettings> settings(const QString &group = QString());

protected:
    void init();

    QList<QQuickStyle *> childStyles() const;

    QQuickStyle *parentStyle() const;
    void setParentStyle(QQuickStyle *style);

    virtual void parentStyleChange(QQuickStyle *newParent, QQuickStyle *oldParent);

    void itemParentChanged(QQuickItem *item, QQuickItem *parent) Q_DECL_OVERRIDE;

private:
    QList<QQuickStyle *> m_childStyles;
    QPointer<QQuickStyle> m_parentStyle;
};

QT_END_NAMESPACE

#endif // QQUICKSTYLE_P_H