1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
open Lwt
open LTerm_widget
let main () =
let do_run, push_layer, pop_layer, exit = prepare_simple_run () in
let vbox = new vbox in
let button = new button "exit" in
button#on_click exit;
vbox#add button;
let change = new button "change counter" in
vbox#add change;
let counter = ref 42 in
let label = new label "" in
let update_label () = label#set_text ("Counter: " ^ (string_of_int !counter)) in
vbox#add label;
update_label ();
let change_counter d = fun () ->
counter := !counter + d;
update_label ()
in
let frame = new frame in
frame#set vbox;
(* Layer 2 *)
let layer2 = new modal_frame in
let vbox' = new vbox in
layer2#set vbox';
let message = new label "This is a new modal layer.\nPress 'close' to close it." in
vbox'#add message;
vbox'#add (new hline);
let increment = new button "increment counter" in
let decrement = new button "decrement counter" in
increment#on_click (change_counter 1);
decrement#on_click (change_counter (-1));
vbox'#add increment;
vbox'#add decrement;
vbox'#add (new hline);
let close = new button "close" in
close#on_click pop_layer;
vbox'#add close;
(* set 'change' button to open modal layer *)
change#on_click (push_layer layer2);
Lazy.force LTerm.stdout >>= fun term ->
LTerm.enable_mouse term >>= fun () ->
Lwt.finalize
(fun () -> do_run frame)
(fun () -> LTerm.disable_mouse term)
let () = Lwt_main.run (main ())
|
