ColorGradientSource.h

/*
 * This file is part of KQuickCharts
 * SPDX-FileCopyrightText: 2019 Marco Martin <mart@kde.org>
 * SPDX-FileCopyrightText: 2019 David Edmundson <davidedmundson@kde.org>
 * SPDX-FileCopyrightText: 2019 Arjen Hiemstra <ahiemstra@heimr.nl>
 *
 * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
#ifndef COLORGRADIENTSOURCE_H
#define COLORGRADIENTSOURCE_H
 
#include <QColor>
#include <QList>
 
#include "ChartDataSource.h"
 
/**
 * A data source that provides a hue-shifted color as data.
 */
class QUICKCHARTS_EXPORT ColorGradientSource : public ChartDataSource
{
    Q_OBJECT
    QML_ELEMENT
 
public:
    explicit ColorGradientSource(QObject *parent = nullptr);
 
    Q_PROPERTY(QColor baseColor READ baseColor WRITE setBaseColor NOTIFY baseColorChanged)
    QColor baseColor() const;
    void setBaseColor(const QColor &newBaseColor);
    Q_SIGNAL void baseColorChanged();
 
    Q_PROPERTY(int itemCount READ itemCount WRITE setItemCount NOTIFY itemCountChanged)
    void setItemCount(int newItemCount);
    Q_SIGNAL void itemCountChanged();
 
    Q_PROPERTY(QVariantList colors READ colors NOTIFY dataChanged)
    QVariantList colors() const;
 
    int itemCount() const override;
    QVariant item(int index) const override;
    QVariant minimum() const override;
    QVariant maximum() const override;
 
private:
    void regenerateColors();
 
    QColor m_baseColor = Qt::blue;
    int m_itemCount = 0;
    QList<QColor> m_colors;
};
 
#endif // COLORGRADIENTSOURCE_H