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_
 
// Project headers (subdirs before local)
#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();

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

            static 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_