many changes :P

mapview/tools/ToolMapGrid.h

@@ -5,12 +5,23 @@
 
 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);