abstractchartlayout_p.h

// 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 ABSTRACTCHARTLAYOUT_H

#define ABSTRACTCHARTLAYOUT_H

#include <QtWidgets/QGraphicsLayout>

#include <QtCore/QMargins>

#include <QtCharts/QChartGlobal>

#include <QtCharts/private/qchartglobal_p.h>

QT_BEGIN_NAMESPACE

class ChartTitle;

class ChartAxisElement;

class ChartPresenter;

class QLegend;

class ChartBackground;

class Q_CHARTS_EXPORT AbstractChartLayout : public QGraphicsLayout

public:

    AbstractChartLayout(ChartPresenter *presenter);

    virtual ~AbstractChartLayout();

    virtual void setMargins(const QMargins &margins);

    virtual QMargins margins() const;

    void setGeometry(const QRectF &rect) override;

protected:

    virtual QRectF calculateBackgroundGeometry(const QRectF &geometry, ChartBackground *background,

                                               bool update = true) const;

    virtual QRectF calculateBackgroundMinimum(const QRectF &minimum) const;

    virtual QRectF calculateContentGeometry(const QRectF &geometry) const;

    virtual QRectF calculateContentMinimum(const QRectF &minimum) const;

    virtual QRectF calculateTitleGeometry(const QRectF &geometry, ChartTitle *title,

                                          bool update = true) const;

    virtual QRectF calculateTitleMinimum(const QRectF &minimum, ChartTitle *title) const;

    virtual QRectF calculateLegendGeometry(const QRectF &geometry, QLegend *legend,

                                           bool update = true) const;

    virtual QRectF calculateLegendMinimum(const QRectF &minimum, QLegend *legend) const;

    virtual QRectF calculateAxisGeometry(const QRectF &geometry,

                                         const QList<ChartAxisElement *>& axes,

                                         bool update = true) const = 0;

    virtual QRectF calculateAxisMinimum(const QRectF &minimum,

                                        const QList<ChartAxisElement *>& axes) const = 0;

    // from QGraphicsLayout

    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 {};

    ChartPresenter *m_presenter;

    QMargins m_margins;

    QRectF m_minAxisRect;

};

QT_END_NAMESPACE

#endif // ABSTRACTCHARTLAYOUT_H