initial commit

mapview/tools/ToolRuler.h

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+#ifndef TOOLRULER_H
+#define TOOLRULER_H
+
+#include "Tool.h"
+
+class ToolRuler : public Tool {
+
+private:
+
+	int mouseX;
+	int mouseY;
+
+	const bool fullSize = true;
+	const int rs = 40;		// ruler size
+	const int tsMajor = 20;	// major-tick size
+	const int tsMinor = 5;	// minor-tick size
+
+public:
+
+	virtual void mouseMoveEvent(MapView2D* m, QMouseEvent* e) override {
+
+		(void) m;
+
+		this->mouseX = e->x();
+		this->mouseY = e->y();
+	}
+
+	virtual void paintBefore(MapView2D* m, Painter& p) override {
+
+		(void) m;
+
+		// mouse-indicator within the image?
+		if (fullSize) {
+			const int w = p.width();
+			const int h = p.height();
+			p.setPenBrush(Qt::lightGray, Qt::NoBrush);
+			p.p->drawLine(rs, mouseY, w, mouseY);
+			p.p->drawLine(mouseX, rs, mouseX, h);
+		}
+
+	}
+
+	virtual void paintAfter(MapView2D* m, Painter& p) override {
+
+		(void) m;
+
+		static const QColor c1(240,240,240);
+		static const QColor c2(200,200,200);
+
+		const int w = p.width();
+		const int h = p.height();
+
+		// ruler step-size depending on the current zoom level
+		const float step = p.getScaler().getLODstep();
+		const float sStep = step / 10.0f;
+
+		// the visible map-rect
+		const Rect r = p.getScaler().getMapVisible(w, h, step);
+
+		QRect rx(rs,0,w-1-rs,rs);
+		QRect ry(0,rs,rs,h-1-rs);
+
+		// background
+		{
+
+			// samller font
+			QFont f = p.p->font(); f.setPointSize(8);
+			p.p->setFont(f);
+
+			// outline
+			p.setPen(Qt::darkGray);
+
+			// x-axis
+			QLinearGradient gx(0,0,0,rs); gx.setColorAt(0, c1); gx.setColorAt(1, c2); p.setBrush(gx);
+			p.p->drawRect(rx);
+
+			// y-axis
+			QLinearGradient gy(0,0,rs,0); gy.setColorAt(0, c2); gy.setColorAt(1, c1); p.setBrush(gy);
+			p.p->drawRect(ry);
+
+		}
+
+		// mouse-indicator
+		p.setPenBrush(Qt::darkGray, Qt::NoBrush);
+		p.p->drawLine(0, mouseY, rs, mouseY);
+		p.p->drawLine(mouseX, 0, mouseX, rs);
+
+
+
+		p.setPenBrush(Qt::black, Qt::NoBrush);
+		char buf[128];
+
+
+		// y-axis
+		p.p->setClipRect(ry);
+		for (float y = r.y0; y <= r.y1; y += step) {
+
+			// major-lines
+			const float yMajor = p.s.yms(y);
+			//if (yMajor < 0 || yMajor > h) {continue;}		// stop at the end
+			p.p->drawLine(0,yMajor, tsMajor,yMajor);
+
+			// minor-lines
+			for (float y1 = y+sStep; y1 < y+step; y1 += sStep) {
+				const float yMinor = p.s.yms(y1);
+				p.p->drawLine(0,yMinor, tsMinor,yMinor);
+			}
+
+			// text-label
+			std::sprintf(buf, "%.1f", y);
+			p.p->drawText(6, yMajor-2, buf);
+		}
+
+		// x-axis
+		p.p->setClipRect(rx);
+		for (float x = r.x0; x <= r.x1; x += step) {
+
+			// major-lines
+			const float xMajor = p.s.xms(x);
+			//if (xMajor < 0 || xMajor > w) {continue;}		// stop at the end
+			p.p->drawLine(xMajor,0, xMajor,tsMajor);
+
+			// minor-lines
+			for (float x1 = x+sStep; x1 < x+step; x1 += sStep) {
+				const float xMinor = p.s.xms(x1);
+				p.p->drawLine(xMinor,0, xMinor,tsMinor);
+			}
+
+			// text-label
+			std::sprintf(buf, "%.1f", x);
+			p.p->drawText(xMajor+2, 18, buf);
+		}
+
+		p.p->setClipping(false);
+
+	}
+
+};
+
+#endif // TOOLRULER_H