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draw.c
资源名称：leda.tar.gz　[点击查看]
上传用户：gzelex
上传日期：2007-01-07
资源大小：707k
文件大小：2k
源码类别：

数值算法/人工智能

开发平台：

MultiPlatform

draw.c：源码内容
  1. #include <LEDA/plane.h>
  2. #include <LEDA/window.h>
  5. enum { POINT=0, SEGMENT=1, LINE=2, CIRCLE=3, POLY=4 };
  7. main()
  8. {
  9.   window W;
  11.   line_style lstyle = solid;
  12.   int        lwidth = 1;
  13.   color      col    = black;
  14.   bool       fill   = false;
  15.   int        shape =  POINT;
  17.   panel P("DRAW");
  19.   P.bool_item  ("fill",fill);
  20.   P.color_item ("color",col);
  21.   P.lstyle_item("lstyle",lstyle);
  22.   P.int_item   ("lwidth",lwidth,1,10);
  24.   P.choice_item("shape",shape,"point","segment","line","circle","poly");
  26.   P.button("clear");
  27.   P.button("quit");
  29.   P.display(0,0);
  32.   for(;;)
  33.   { 
  34.     window* wp;
  35.     double x;
  36.     double y;
  37.     read_mouse(wp,x,y);
  39.     if (wp == &W || wp == (window*)&P) put_back_event();
  41.     if (wp == &P)
  42.       { int k = P.read();
  43.         W.set_line_width(lwidth);
  44.         W.set_line_style(lstyle);
  45.   
  46.         if (k == 0) W.clear();
  47.         if (k == 1) break;
  48.        }
  49.     else
  50.       switch(shape) {
  51.   
  52.         case POINT: 
  53.               { point p;
  54.                 W >> p;  
  55.                 W.draw_point(p,col);
  56.                 break;
  57.                }
  58.   
  59.         case SEGMENT: 
  60.               { segment s;
  61.                 W >> s;
  62.                 W.draw_segment(s,col);
  63.                 break;
  64.                }
  65.   
  66.         case LINE: 
  67.               { line l;
  68.                 W >> l;  W.draw_line(l,col);
  69.                 break;
  70.                }
  71.   
  72.         case CIRCLE: 
  73.               { circle c;
  74.                 W >> c;  
  75.                 if (fill) 
  76.                    W.draw_disc(c,col);
  77.                 else
  78.                    W.draw_circle(c,col);
  79.                 break;
  80.                }
  81.   
  82.         case POLY: 
  83.               { polygon P;
  84.                 W >> P;  
  85.                 if (fill) 
  86.                    W.draw_filled_polygon(P,col);
  87.                 else 
  88.                    W.draw_polygon(P,col);
  89.                 break;
  90.                }
  91.       }
  92.   }
  94.   return 0;
  95. }