skplot2d.h
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			#ifndef SKPLOT2D_H
			#define SKPLOT2D_H

			#include "skplot.h"
			#include "plotstream.h"

			#include <vector>

			struct ColoredFunction
			{
			PlotStream<double> stream;
			symkit::color_s color;
			};

			class SKPlot2D : public SKPlot
			{

			std::vector<ColoredFunction> functions;

			static symkit::color_s colorlist[6];

			// take a color from the color list
			symkit::color_s generateColor();

			virtual void keyPressEvent(QKeyEvent*) override;

			public:

			SKPlot2D(float lineWidth, QWidget * parent = 0);

			virtual void paintData(QGLShaderProgram*) override;

			virtual void paintAxys(QGLShaderProgram*) override;

			std::size_t registerNewStream();

			PlotStream<double>& operator[](std::size_t n);

			PlotStream<double>& getFunctionStream(std::size_t n);

			const symkit::color_s& getFunctionColor(std::size_t n) const;

			PlotStream<double>& backStream();

			void clearAll();
			};

			#endif // SKPLOT2D_H

symkit_prog/symplot/skplot2d.h9ad6607cfc74ancarola