chartthememanager_p.h

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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 CHARTTHEMEMANAGER_H

#define CHARTTHEMEMANAGER_H

#include <QtCharts/QChartGlobal>

#include <QtCharts/QChart>

#include <QtGui/QColor>

#include <QtGui/QGradientStops>

#include <QtCharts/private/qchartglobal_p.h>

#include <QtCore/qhash.h>

QT_BEGIN_NAMESPACE

class ChartTheme;

class Q_CHARTS_EXPORT ChartThemeManager: public QObject

    Q_OBJECT

public:

    enum BackgroundShadesMode {

        BackgroundShadesNone = 0,

        BackgroundShadesVertical,

        BackgroundShadesHorizontal,

        BackgroundShadesBoth

};

public:

    explicit ChartThemeManager(QChart* chart);

    void setTheme(QChart::ChartTheme theme);

    ChartTheme* theme() const { return m_theme.data(); }

    void decorateChart(QChart *chart, ChartTheme* theme) const;

    void decorateLegend(QLegend *legend, ChartTheme* theme) const;

    void updateSeries(QAbstractSeries *series);

    QHash<QAbstractSeries *, int> seriesMap() const { return m_seriesMap; }

public:

    static QList<QGradient> generateSeriesGradients(const QList<QColor>& colors);

    static QColor colorAt(const QColor &start, const QColor &end, qreal pos);

    static QColor colorAt(const QGradient &gradient, qreal pos);

private:

    int createIndexKey(const QList<int> &keys) const;

    int seriesCount(QAbstractSeries::SeriesType type) const;

public Q_SLOTS:

    void handleSeriesAdded(QAbstractSeries *series);

    void handleSeriesRemoved(QAbstractSeries *series);

    void handleAxisAdded(QAbstractAxis *axis);

    void handleAxisRemoved(QAbstractAxis *axis);

protected:

    QScopedPointer<ChartTheme> m_theme;

    QHash<QAbstractSeries *,int> m_seriesMap;

    QList<QAbstractAxis *> m_axisList;

    QChart* m_chart;

};

QT_END_NAMESPACE

#endif // CHARTTHEME_H