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