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|
(***********************************************************************)
(* Okey *)
(* *)
(* Maxence Guesdon, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 2001 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
type modifier = Gdk.Tags.modifier
type handler = {
cond : (unit -> bool) ;
cback : (unit -> unit) ;
}
type handler_spec = int * int * Gdk.keysym
(** mods * mask * key *)
let int_of_modifier = function
`SHIFT -> 1
| `LOCK -> 2
| `CONTROL -> 4
| `MOD1 -> 8
| `MOD2 -> 16
| `MOD3 -> 32
| `MOD4 -> 64
| `MOD5 -> 128
| `BUTTON1 -> 256
| `BUTTON2 -> 512
| `BUTTON3 -> 1024
| `BUTTON4 -> 2048
| `BUTTON5 -> 4096
let print_modifier l =
List.iter
(fun m ->
print_string
(((function
`SHIFT -> "SHIFT"
| `LOCK -> "LOCK"
| `CONTROL -> "CONTROL"
| `MOD1 -> "MOD1"
| `MOD2 -> "MOD2"
| `MOD3 -> "MOD3"
| `MOD4 -> "MOD4"
| `MOD5 -> "MOD5"
| `BUTTON1 -> "B1"
| `BUTTON2 -> "B2"
| `BUTTON3 -> "B3"
| `BUTTON4 -> "B4"
| `BUTTON5 -> "B5")
m)^" ")
)
l;
print_newline ()
let int_of_modifiers l =
List.fold_left (fun acc -> fun m -> acc + (int_of_modifier m)) 0 l
module H =
struct
type t = handler_spec * handler
let equal (m,k) (mods, mask, key) =
(k = key) && ((m land mask) = mods)
let filter_with_mask mods mask key l =
List.filter (fun a -> (fst a) <> (mods, mask, key)) l
let find_handlers mods key l =
List.map snd
(List.filter
(fun ((m,ma,k),_) -> equal (mods,key) (m,ma,k))
l
)
end
let (table : (int, H.t list ref) Hashtbl.t) = Hashtbl.create 13
let key_press w ev =
let key = GdkEvent.Key.keyval ev in
let modifiers = GdkEvent.Key.state ev in
try
let (r : H.t list ref) = Hashtbl.find table w#get_oid in
let l = H.find_handlers (int_of_modifiers modifiers) key !r in
let b = ref true in
List.iter
(fun h ->
if h.cond () then
(h.cback () ; b := false)
else
()
)
l;
!b
with
Not_found ->
true
let associate_key_press w =
ignore ((w#event#connect#key_press ~callback: (key_press w)) : GtkSignal.id)
let default_modifiers = ref ([] : modifier list)
let default_mask = ref ([`MOD2 ; `MOD3 ; `MOD4 ; `MOD5 ; `LOCK] : modifier list)
let set_default_modifiers l = default_modifiers := l
let set_default_mask l = default_mask := l
let remove_widget (w : < event : GObj.event_ops ; get_oid : int ; ..>) () =
try
let r = Hashtbl.find table w#get_oid in
r := []
with
Not_found ->
()
let add1 ?(remove=false) w
?(cond=(fun () -> true))
?(mods= !default_modifiers)
?(mask= !default_mask)
k callback =
let r =
try Hashtbl.find table w#get_oid
with Not_found ->
let r = ref [] in
Hashtbl.add table w#get_oid r;
ignore (w#connect#destroy ~callback: (remove_widget w));
associate_key_press w;
r
in
let n_mods = int_of_modifiers mods in
let n_mask = lnot (int_of_modifiers mask) in
let new_h = { cond = cond ; cback = callback } in
if remove then
(
let l = H.filter_with_mask n_mods n_mask k !r in
r := ((n_mods, n_mask, k), new_h) :: l
)
else
r := ((n_mods, n_mask, k), new_h) :: !r
let add w
?(cond=(fun () -> true))
?(mods= !default_modifiers)
?(mask= !default_mask)
k callback =
add1 w ~cond ~mods ~mask k callback
let add_list w
?(cond=(fun () -> true))
?(mods= !default_modifiers)
?(mask= !default_mask)
k_list callback =
List.iter (fun k -> add w ~cond ~mods ~mask k callback) k_list
let set w
?(cond=(fun () -> true))
?(mods= !default_modifiers)
?(mask= !default_mask)
k callback =
add1 ~remove: true w ~cond ~mods ~mask k callback
let set_list w
?(cond=(fun () -> true))
?(mods= !default_modifiers)
?(mask= !default_mask)
k_list callback =
List.iter (fun k -> set w ~cond ~mods ~mask k callback) k_list
|
