legendlayout_p.h - mozsearch

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt Chart 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.

#ifndef LEGENDLAYOUT_H

#define LEGENDLAYOUT_H

#include <QtWidgets/QGraphicsLayout>

#include <QtCharts/QChartGlobal>

#include <QtCharts/private/qchartglobal_p.h>

QT_BEGIN_NAMESPACE

class QLegend;

class LegendMarkerItem;

class Q_CHARTS_EXPORT LegendLayout : public QGraphicsLayout

public:

    LegendLayout(QLegend *legend);

    virtual ~LegendLayout();

    void setGeometry(const QRectF &rect) override;

    void setOffset(qreal x, qreal y);

    QPointF offset() const;

    void invalidate() override;

protected:

    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const override;

    int count() const override { return 0; }

    QGraphicsLayoutItem *itemAt(int) const override { return 0; };

    void removeAt(int) override {};

private:

    void setAttachedGeometry(const QRectF &rect);

    void setDettachedGeometry(const QRectF &rect);

    struct LegendWidthStruct {

        LegendMarkerItem *item;

        qreal width;

};

    static bool widthLongerThan(const LegendWidthStruct *item1,

                                const LegendWidthStruct *item2);

private:

    QLegend *m_legend;

    qreal m_offsetX;

    qreal m_offsetY;

    qreal m_minOffsetX;

    qreal m_minOffsetY;

    qreal m_maxOffsetX;

    qreal m_maxOffsetY;

    qreal m_width;

    qreal m_height;

};

QT_END_NAMESPACE

#endif