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let on x f = match x with None -> () | Some x -> f x
let fire fs x = List.iter (fun f -> f x) fs
let once = Wutil_once.once
let small_font =
once (fun (f: GPango.font_description) ->
let f = f#copy in
let size = f#size - 2 in
f#modify ~size (); f)
let bold_font =
once (fun (f: GPango.font_description) ->
let f = f#copy in
let weight = `BOLD in
f#modify ~weight (); f)
let modify_font phi (widget: #GObj.widget) =
widget#misc#modify_font (phi widget#misc#pango_context#font_description)
let set_small_font w = modify_font small_font w
let set_bold_font w = modify_font bold_font w
let set_font w name = w#misc#modify_font_by_name name
let set_monospace w = set_font w "monospace"
let set_tooltip w m = on m w#misc#set_tooltip_text
let set_enabled (w : #GObj.widget) = w#misc#set_sensitive
let set_visible (w : #GObj.widget) e =
let m = w#misc in if e then m#show () else m#hide ()
let share = ref "/usr/local/share"
let flush = ref prerr_endline
let warning msg =
let buffer = Buffer.create 80 in
Format.kfprintf
(fun fmt ->
Format.pp_print_flush fmt () ;
!flush (Buffer.contents buffer))
(Format.formatter_of_buffer buffer) msg
let to_utf8 s =
try
if Glib.Utf8.validate s then s else Glib.Convert.locale_to_utf8 s
with Glib.Convert.Error _ ->
try
Glib.Convert.convert_with_fallback
~fallback:"#neither UTF-8 nor locale nor ISO-8859-15#"
~to_codeset:"UTF-8"
~from_codeset:"ISO_8859-15"
s
with Glib.Convert.Error _ as e -> Printexc.to_string e
let later f =
let for_idle () = f () ; false in
let prio = Glib.int_of_priority `LOW in
ignore (Glib.Idle.add ~prio for_idle)
let get_pane_ratio (paned:GPack.paned) =
let paned_min_pos = paned#min_position in
let paned_max_pos = paned#max_position in
let length = paned_max_pos - paned_min_pos in
if length = 0 then 0.5
else (float_of_int paned#position)/.(float_of_int length)
let set_pane_ratio (paned:GPack.paned) ratio =
let paned_min_pos = paned#min_position in
let offset =
int_of_float (float (paned#max_position - paned_min_pos) *. ratio)
in paned#set_position (paned_min_pos + offset)
class type widget =
object
method set_visible : bool -> unit
method set_enabled : bool -> unit
method coerce : GObj.widget
method widget : widget
end
class gobj_widget obj =
object(self)
method set_visible = set_visible obj
method set_enabled = set_enabled obj
method coerce : GObj.widget = (obj#coerce)
method widget = (self :> widget)
end
class gobj_action obj =
object
inherit gobj_widget obj
method set_tooltip txt = set_tooltip (obj :> GObj.widget) (Some txt)
end
class layout =
object(self)
val mutable content : widget option = None
method coerce =
match content with
| None -> raise (Invalid_argument "Wbox.layout")
| Some w -> w#coerce
method widget =
match content with
| None -> (self :> widget)
| Some w -> w
method set_visible v =
match content with
| None -> ()
| Some w -> w#set_visible v
method set_enabled e =
match content with
| None -> ()
| Some w -> w#set_enabled e
method populate : 'a. (#widget as 'a) -> unit =
fun w -> content <- Some (w :> widget)
end
class virtual ['a] handler =
object(self)
method virtual connect : ('a -> unit) -> unit
method on_check v f = self#connect (fun e -> f (e=v))
method on_value v f = self#connect (fun e -> if e=v then f ())
method on_event f = self#connect (fun _ -> f ())
end
class ['a] signal =
object
val mutable enabled = true
val mutable lock = false
val mutable demon = []
inherit ['a] handler
method fire (x:'a) =
if enabled && not lock then
try lock <- true ; fire demon x ; lock <- false
with err -> lock <- false ; raise err
method connect f = demon <- demon @ [f]
method set_enabled e = enabled <- e
method lock : (unit -> unit) -> unit =
fun f ->
if not lock then
try lock <- true ; f () ; lock <- false
with err -> lock <- false ; raise err
end
class ['a] selector default =
object(self)
val mutable current : 'a = default
inherit ['a] signal
method get = current
method set x = current <- x ; self#fire x
method send f () = self#lock (fun () -> f current)
end