initial commit

mapview/tools/ToolMapGrid.h

@@ -0,0 +1,71 @@
+#ifndef TOOLMAPGRID_H
+#define TOOLMAPGRID_H
+
+#include "Tool.h"
+
+class ToolMapGrid : public Tool {
+
+public:
+
+	void paintBefore(MapView2D* m, Painter& p) override {
+
+		(void) m;
+
+		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