curvegraph.hpp

// SPDX-License-Identifier: LGPL-2.1-or-later OR BSD-3-Clause
// SPDX-FileCopyrightText: 2004 - 2008 Olof Naessén and Per Larsson
// SPDX-FileCopyrightText: 2013 - 2026 Fifengine contributors
 
#ifndef INCLUDE_FIFECHAN_WIDGETS_CURVEGRAPH_HPP_
#define INCLUDE_FIFECHAN_WIDGETS_CURVEGRAPH_HPP_
 
#include "fifechan/point.hpp"
#include "fifechan/widget.hpp"
 
namespace fcn
{
    class Graphics;

    class FIFEGUI_API CurveGraph : public Widget
    {
    public:
        CurveGraph();

        explicit CurveGraph(PointVector data);
 
        ~CurveGraph() override = default;
 
        CurveGraph(CurveGraph const &)            = delete;
        CurveGraph& operator=(CurveGraph const &) = delete;
        CurveGraph(CurveGraph&&)                  = delete;
        CurveGraph& operator=(CurveGraph&&)       = delete;

        void setPointVector(PointVector const & data);

        PointVector const & getPointVector() const;

        void resetPointVector();

        void setThickness(unsigned int thickness);

        unsigned int getThickness() const;

        void setAutomaticControlPoints(bool acp);

        bool isAutomaticControlPoints() const;

        void setOpaque(bool opaque);

        bool isOpaque() const;

        void draw(Graphics* graphics) override;
 
    protected:
        void update();

        Point getBezierPoint(PointVector const & points, int elements, float t);

        void addControlPoints(PointVector const & points, PointVector& newPoints);

        bool m_opaque{false};

        bool m_acp{true};

        bool m_needUpdate{false};

        unsigned int m_thickness{1};

        PointVector m_data;

        PointVector m_curveData;
    };
}; // namespace fcn
 
#endif // INCLUDE_FIFECHAN_WIDGETS_CURVEGRAPH_HPP_