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(***********************************************************************)
(* *)
(* MLTk, Tcl/Tk interface of OCaml *)
(* *)
(* Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis *)
(* projet Cristal, INRIA Rocquencourt *)
(* Jacques Garrigue, Kyoto University RIMS *)
(* *)
(* Copyright 2002 Institut National de Recherche en Informatique et *)
(* en Automatique and Kyoto University. All rights reserved. *)
(* This file is distributed under the terms of the GNU Library *)
(* General Public License, with the special exception on linking *)
(* described in file LICENSE found in the OCaml source tree. *)
(* *)
(***********************************************************************)
(* The eyes of OCaml (CamlTk) *)
open Camltk;;
let _ =
let top = opentk () in
let fw = Frame.create top [] in
pack [fw] [];
let c = Canvas.create fw [Width (Pixels 200); Height (Pixels 200)] in
let create_eye cx cy wx wy ewx ewy bnd =
let _o2 =
Canvas.create_oval c
(Pixels (cx - wx)) (Pixels (cy - wy))
(Pixels (cx + wx)) (Pixels (cy + wy))
[Outline (NamedColor "black"); Width (Pixels 7);
FillColor (NamedColor "white")]
and o =
Canvas.create_oval c
(Pixels (cx - ewx)) (Pixels (cy - ewy))
(Pixels (cx + ewx)) (Pixels (cy + ewy))
[FillColor (NamedColor "black")] in
let curx = ref cx
and cury = ref cy in
bind c [[], Motion]
(BindExtend ([Ev_MouseX; Ev_MouseY],
(fun e ->
let nx, ny =
let xdiff = e.ev_MouseX - cx
and ydiff = e.ev_MouseY - cy in
let diff = sqrt ((float xdiff /. (float wx *. bnd)) ** 2.0 +.
(float ydiff /. (float wy *. bnd)) ** 2.0) in
if diff > 1.0 then
truncate ((float xdiff) *. (1.0 /. diff)) + cx,
truncate ((float ydiff) *. (1.0 /. diff)) + cy
else
e.ev_MouseX, e.ev_MouseY
in
Canvas.move c o (Pixels (nx - !curx)) (Pixels (ny - !cury));
curx := nx;
cury := ny)))
in
create_eye 60 100 30 40 5 6 0.6;
create_eye 140 100 30 40 5 6 0.6;
pack [c] []
let _ = Printexc.print mainLoop ()
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