51 lines
2.1 KiB
OCaml
51 lines
2.1 KiB
OCaml
(***********************************************************************)
|
|
(* *)
|
|
(* 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. *)
|
|
(* *)
|
|
(***********************************************************************)
|
|
open Camltk
|
|
open Widget
|
|
|
|
let version = "$Id$"
|
|
|
|
(*
|
|
* Finding fonts. Inspired by code in Ical by Sanjay Ghemawat.
|
|
* Possibly bogus because some families use "i" for italic where others
|
|
* use "o".
|
|
* wght: bold, medium
|
|
* slant: i, o, r
|
|
* pxlsz: 8, 10, ...
|
|
*)
|
|
module StringSet = Set.Make(struct type t = string let compare = compare end)
|
|
|
|
let available_fonts = ref (StringSet.empty)
|
|
|
|
let get_canvas =
|
|
Frx_misc.autodef (fun () -> Canvas.create Widget.default_toplevel [])
|
|
|
|
|
|
let find fmly wght slant pxlsz =
|
|
let fontspec =
|
|
"-*-"^fmly^"-"^wght^"-"^slant^"-normal-*-"^string_of_int pxlsz^"-*-*-*-*-*-iso8859-1" in
|
|
if StringSet.mem fontspec !available_fonts then fontspec
|
|
else
|
|
let c = get_canvas() in
|
|
try
|
|
let tag = Canvas.create_text c (Pixels 0) (Pixels 0)
|
|
[Text "foo"; Font fontspec] in
|
|
Canvas.delete c [tag];
|
|
available_fonts := StringSet.add fontspec !available_fonts;
|
|
fontspec
|
|
with
|
|
_ -> raise (Invalid_argument fontspec)
|