//
// This is example code from Chapter 13.5 "Line style" of
// "Programming -- Principles and Practice Using C++" by Bjarne Stroustrup
//

#include "Simple_window.h"  // get access to our window library
#include "Graph.h"          // get access to our graphics library facilities

//------------------------------------------------------------------------------

int main()
   try
      {
	 using namespace Graph_lib;    // our graphics facilities are in Graph_lib

	 Simple_window win3{Point{100,100},600,400,"grid"};    

	 int x_size = win3.x_max();    // get the size of our window
	 int y_size = win3.y_max();
	 int x_grid = 80;
	 int y_grid = 40; 

	 Lines grid;
	 for (int x=x_grid; x<x_size; x+=x_grid)
	    grid.add(Point{x,0},Point{x,y_size});    // vertical line
	 for (int y = y_grid; y<y_size; y+=y_grid)
	    grid.add(Point{0,y},Point{x_size,y});    // horizontal line

	 grid.set_color(Color::red);
	 grid.set_style(Line_style{Line_style::dash,2});
	 win3.attach(grid);                           // attach the lines to the window
	 win3.wait_for_button();                      // Display!
      }
   catch(exception& e) {
      // some error reporting
      return 1;
   }
   catch(...) {
      // some more error reporting
      return 2;
   }

//------------------------------------------------------------------------------