// Description: declaration of graphics facilities

// Revision history: 4/7/1999/LY



#ifndef OVERLAY_WINDOW

#define OVERLAY_WINDOW



#include "decl.h"

#include <leda\GraphWin.h>

#include "dcel.h"



class OverlayWindow : public GraphWin	// inherit from LEDA graphics window class

{

	public:

		OverlayWindow(double x = DEFAULT_WIDTH, double y = DEFAULT_HEIGHT, 

			const char* label = "Map overlay");

		// redefinition of init in derived class in order to provide default arguments

		void init(double xmin = DEFAULT_XMIN, double xmax = DEFAULT_XMAX, 

					 double ymin = DEFAULT_YMIN)

		{	GraphWin::win_init(xmin,xmax,ymin);	}

		void draw_D_CEL();	// used in redraw operation (requires earlier call to second version of function)

		void draw_D_CEL(const D_CEL& d_cel, double x = DEFAULT_X_OFFSET, 

							 double y = DEFAULT_Y_OFFSET);

	private:

		void draw_D_CEL_vertex(Vertex* v_ptr);

		void draw_D_CEL_half_edge(HalfEdge* he_ptr);

		void draw_D_CEL_face(Face* f_ptr);

		double calc_x(double);

		double calc_y(double);



		D_CEL*	d_cel_ptr;

		vector<leda_node>	nodes;

};



#endif