qgraphicslayoutstyleinfo_p.h

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// Copyright (C) 2016 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
#ifndef QGRAPHICSLAYOUTSTYLEINFO_P_H
#define QGRAPHICSLAYOUTSTYLEINFO_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 <QtWidgets/private/qtwidgetsglobal_p.h>
#include <QtGui/private/qabstractlayoutstyleinfo_p.h>
#include <QtWidgets/qstyleoption.h>
 
#include <memory>
 
QT_REQUIRE_CONFIG(graphicsview);
 
QT_BEGIN_NAMESPACE
 
class QStyle;
class QWidget;
class QGraphicsLayoutPrivate;
 
class QGraphicsLayoutStyleInfo : public QAbstractLayoutStyleInfo
{
public:
    QGraphicsLayoutStyleInfo(const QGraphicsLayoutPrivate *layout);
    ~QGraphicsLayoutStyleInfo();
 
    virtual qreal combinedLayoutSpacing(QLayoutPolicy::ControlTypes controls1,
                                        QLayoutPolicy::ControlTypes controls2,
                                        Qt::Orientation orientation) const override;
 
    virtual qreal perItemSpacing(QLayoutPolicy::ControlType control1,
                                 QLayoutPolicy::ControlType control2,
                                 Qt::Orientation orientation) const override;
 
    virtual qreal spacing(Qt::Orientation orientation) const override;
 
    virtual qreal windowMargin(Qt::Orientation orientation) const override;
 
    virtual void invalidate() override
    {
        m_style = nullptr;
        QAbstractLayoutStyleInfo::invalidate();
    }
 
    QWidget *widget() const;
    QStyle *style() const;
 
private:
    const QGraphicsLayoutPrivate *m_layout;
    mutable QStyle *m_style;
    QStyleOption m_styleOption;
    std::unique_ptr<QWidget> m_widget;
};
 
QT_END_NAMESPACE
 
#endif // QGRAPHICSLAYOUTSTYLEINFO_P_H