//
// This is example code from Chapter 13.10 "Managing unnamed objects" 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 win{Point{100,100},600,400,"16*16 color matrix"};
	 Vector_ref<Rectangle> vr;

	 for (int i = 0; i<16; ++i)
	    for (int j = 0; j<16; ++j) {
	       vr.push_back(new Rectangle{Point{i*20,j*20},20,20});
	       vr[vr.size()-1].set_fill_color(i*16+j);
	       win.attach(vr[vr.size()-1]);
	    }

	 win.wait_for_button();       // Display!
      }
   catch(exception& e) {
      // some error reporting
      return 1;
   }
   catch(...) {
      // some more error reporting
      return 2;
   }

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