INTERFACE UNIT 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
*)

ALIAS
  GCoord=int16;

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

CLASS GWindow;
  XScale,YScale:GCoord;
  NumColors:INT16;
  ok:BOOLEAN;
  XL,YT,XR,YB:GCoord;
  PreviousMode:INT16;
  CurrentColor,CurrentBackColor:INT16;
  (* There are some private functions which I am keeping private *)
  STATIC PROCEDURE Open(x1,y1,x2,y2:GCoord;cr:INT16);
  STATIC PROCEDURE Close;
  STATIC PROCEDURE ReSize(x1,y1,x2,y2:GCoord);
  STATIC PROCEDURE SetColor(Col,BkCol:INT16);
  STATIC PROCEDURE Clear(BkCol:INT16);
  STATIC PROCEDURE Plot(x,y:GCoord;Col:INT16);
  STATIC FUNCTION Point(x,y:GCoord):INT16;
  STATIC PROCEDURE Fill(x,y:GCoord;bound:INT16;Flood:BOOLEAN);
  STATIC PROCEDURE Line(x1,y1,x2,y2:GCoord;Col:INT16);
  STATIC PROCEDURE Rectangle(left,top,width,height:GCoord;fill:INT16);
  STATIC PROCEDURE Polygon(nsides:INT16;px,py:ADDRESS;fill:INT16);
  STATIC PROCEDURE Ellipse(x,y,major,minor:GCoord;fill:INT16);
  STATIC PROCEDURE EllipticArc(x,y,major,minor:GCoord;StartAngle,EndAngle:INT16);
  STATIC PROCEDURE EllipticPie(x,y,major,minor:GCoord;Start,EndAngle,Fill:INT16);
  STATIC PROCEDURE Cuboid(X,Y,widht,height,depth:GCoord;top,fill:INT16);
  STATIC PROCEDURE CursorPosition(x,y:GCoord);
  STATIC FUNCTION CharHeight:INT16;
  STATIC FUNCTION CharWidth:INT16;
END;
END .