DEFINITION MODULE GWinM2P;

(* A simple interface to parts of the graph module.
   Note that a major aim is to provide a device independant co-ord system.
   Therefore all windows are from (0,0) Top-Left to (1024,1024) bottom right
*)

CONST
  GCoord::=INTEGER;
TYPE
  ErrType=(ErrNoErr,ErrUnknownAdapter,ErrFewerColors,ErrUnknownMode);
VAR
  _GraphErr:ErrType;

CLASS GWindow;
  XScale,YScale:GCoord;
  NumColors:INTEGER;
  ok:BOOLEAN;
  XL,YT,XR,YB:GCoord;
  PreviousMode:INTEGER;
  CurrentColor,CurrentBackColor:INTEGER;
  (* There are some private functions which I am keeping private *)
  PROCEDURE Open(x1,y1,x2,y2:GCoord;ColsReq:INTEGER);
  PROCEDURE Close;
  PROCEDURE ReSize(x1,y1,x2,y2:GCoord);
  PROCEDURE SetColor(Col,BkCol:INTEGER);
  PROCEDURE Clear(BkCol:INTEGER);
  PROCEDURE Plot(x,y:GCoord;Col:INTEGER);
  PROCEDURE Point(x,y:GCoord):INTEGER;
  PROCEDURE Fill(x,y:GCoord;bound:INTEGER;Flood:BOOLEAN);
  PROCEDURE Line(x1,y1,x2,y2:GCoord;Col:INTEGER);
  PROCEDURE Rectangle(left,top,width,height:GCoord;fill:INTEGER);
  PROCEDURE Polygon(nsides:INTEGER;px,py:ADDRESS;fill:INTEGER);
  PROCEDURE Ellipse(x,y,major,minor:GCoord;fill:INTEGER);
  PROCEDURE EllipticArc(x,y,major,minor:GCoord;StartAngle,EndAngle:INTEGER);
  PROCEDURE EllipticPie(x,y,major,minor:GCoord;Start,EndAngle,FillQ:INTEGER);
  PROCEDURE Cuboid(X,Y,width,height,depth:GCoord;top,fill:INTEGER);
  PROCEDURE CursorPosition(x,y:GCoord);
  PROCEDURE CharHeight():INTEGER;
  PROCEDURE CharWidth():INTEGER;
  PROCEDURE VectorFromAngle(Ang:INTEGER;VAR X,Y:GCoord);
  PROCEDURE ArcServer(X,Y,Major,Minor:GCoord;StartA,EndA:INTEGER;Pie,FillQ:BOOLEAN);
  PROCEDURE AffixColor(Col,BkCol:INTEGER);
  PROCEDURE XReal(x:GCoord):GCoord;
  PROCEDURE YReal(x:GCoord):GCoord;
  PROCEDURE XPhys(x:GCoord):GCoord;
  PROCEDURE YPhys(x:GCoord):GCoord;
  PROCEDURE Colour(x:INTEGER):INTEGER;
END GWindow;
END GWinM2P.