#ifndef TOOLMAPGRID_H
#define TOOLMAPGRID_H

#include "Tool.h"

class ToolMapGrid : public Tool {

private:

	bool show = true;

public:

	virtual void keyPressEvent(MapView2D* m, QKeyEvent* e) {
		(void) m;
		if (e->key() == Qt::Key_NumberSign) { show = !show; }
	}

	void paintBefore(MapView2D* m, Painter& p) override {

		(void) m;

		if (!show) {return;}

		static const QColor cB(250,250,250);
		static const QColor cN(235,235,235);
		static const QColor c0(128,128,128);

		int w = p.width();
		int h = p.height();

		// grid-size
		const float step = p.getScaler().getLODstep();
		const float sStep = step/5;

		// map-region visible on the screen
		const Rect r = p.getScaler().getMapVisible(w, h, step);

		// x-lines
		for (float x = r.x0; x < r.x1; x += step) {

			// major-lines (without center)
			if (std::abs(x) > 0.001) {
				p.setPenBrush(cN, Qt::NoBrush);
				p.drawLine(x, r.y0, x, r.y1);
			}

			// minor-lines
			p.setPenBrush(cB, Qt::NoBrush);
			for (float x1 = x+sStep; x1 < x+step; x1 += sStep) {
				p.drawLine(x1, r.y0, x1, r.y1);
			}

		}

		// y-lines
		for (float y = r.y0; y < r.y1; y += step) {

			// major-lines (without center)
			if (std::abs(y) > 0.001) {
				p.setPenBrush(cN, Qt::NoBrush);
				p.drawLine(r.x0, y, r.x1, y);
			}

			// minor-lines
			p.setPenBrush(cB, Qt::NoBrush);
			for (float y1 = y+sStep; y1 < y+step; y1 += sStep) {
				p.drawLine(r.x0, y1, r.x1, y1);
			}

		}

		// thick center lines
		p.setPenBrush(c0, Qt::NoBrush);
		p.drawLine(0, r.y0, 0, r.y1);
		p.drawLine(r.x0, 0, r.x1, 0);

	}

};

#endif // TOOLMAPGRID_H