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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Util
type color = GDraw.color
module Segment :
sig
type +'a t
val length : 'a t -> int
val resize : 'a t -> int -> 'a t
val empty : 'a t
val add : int -> 'a -> 'a t -> 'a t
val remove : int -> 'a t -> 'a t
val fold : ('a -> 'a -> bool) -> (int -> int -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
end =
struct
type 'a t = {
length : int;
content : 'a Int.Map.t;
}
let empty = { length = 0; content = Int.Map.empty }
let length s = s.length
let resize s len =
if s.length <= len then { s with length = len }
else
let filter i v = i < len in
{ length = len; content = Int.Map.filter filter s.content }
let add i v s =
if i < s.length then
{ s with content = Int.Map.add i v s.content }
else s
let remove i s = { s with content = Int.Map.remove i s.content }
let fold eq f s accu =
let make k v (cur, accu) = match cur with
| None -> Some (k, k, v), accu
| Some (i, j, w) ->
if k = j + 1 && eq v w then Some (i, k, w), accu
else Some (k, k, v), (i, j, w) :: accu
in
let p, segments = Int.Map.fold make s.content (None, []) in
let segments = match p with
| None -> segments
| Some p -> p :: segments
in
List.fold_left (fun accu (i, j, v) -> f i j v accu) accu segments
end
let i2f = float_of_int
let f2i = int_of_float
let color_eq (c1 : GDraw.color) (c2 : GDraw.color) = match c1, c2 with
| `BLACK, `BLACK -> true
| `COLOR c1, `COLOR c2 -> c1 == c2
| `NAME s1, `NAME s2 -> String.equal s1 s2
| `RGB (r1, g1, b1), `RGB (r2, g2, b2) -> r1 = r2 && g1 = g2 && b1 = b2
| `WHITE, `WHITE -> true
| _ -> false
class type segment_signals =
object
inherit GObj.misc_signals
inherit GUtil.add_ml_signals
method clicked : callback:(int -> unit) -> GtkSignal.id
end
class segment_signals_impl obj (clicked : 'a GUtil.signal) : segment_signals =
object
val after = false
inherit GObj.misc_signals obj
inherit GUtil.add_ml_signals obj [clicked#disconnect]
method clicked = clicked#connect ~after
end
class segment () =
let box = GBin.frame () in
let eventbox = GBin.event_box ~packing:box#add () in
let draw = GMisc.image ~packing:eventbox#add () in
object (self)
inherit GObj.widget box#as_widget
val mutable width = 1
val mutable height = 20
val mutable data = Segment.empty
val mutable default : color = `WHITE
val mutable pixmap : GDraw.pixmap = GDraw.pixmap ~width:1 ~height:1 ()
val clicked = new GUtil.signal ()
initializer
box#misc#set_size_request ~height ();
let cb rect =
let w = rect.Gtk.width in
let h = rect.Gtk.height in
(** Only refresh when size actually changed, otherwise loops *)
if self#misc#visible && (width <> w || height <> h) then begin
width <- w;
height <- h;
self#redraw ();
end
in
let _ = box#misc#connect#size_allocate cb in
let clicked_cb ev =
let x = GdkEvent.Button.x ev in
let (width, _) = pixmap#size in
let len = Segment.length data in
let idx = f2i ((x *. i2f len) /. i2f width) in
let () = clicked#call idx in
true
in
let _ = eventbox#event#connect#button_press clicked_cb in
(** Initial pixmap *)
draw#set_pixmap pixmap
method length = Segment.length data
method set_length len =
data <- Segment.resize data len;
if self#misc#visible then self#refresh ()
method private fill_range color i j =
let i = i2f i in
let j = i2f j in
let width = i2f width in
let len = i2f (Segment.length data) in
let x = f2i ((i *. width) /. len) in
let x' = f2i ((j *. width) /. len) in
let w = x' - x in
pixmap#set_foreground color;
pixmap#rectangle ~x ~y:0 ~width:w ~height ~filled:true ();
draw#set_mask None;
method add i color =
data <- Segment.add i color data;
if self#misc#visible then self#fill_range color i (i + 1)
method remove i =
data <- Segment.remove i data;
if self#misc#visible then self#fill_range default i (i + 1)
method set_default_color color = default <- color
method default_color = default
method private redraw () =
pixmap <- GDraw.pixmap ~width ~height ();
draw#set_pixmap pixmap;
self#refresh ();
method private refresh () =
pixmap#set_foreground default;
pixmap#rectangle ~x:0 ~y:0 ~width ~height ~filled:true ();
let fold i j v () = self#fill_range v i (j + 1) in
Segment.fold color_eq fold data ();
draw#set_mask None;
method connect =
new segment_signals_impl box#as_widget clicked
end
|
