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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 1998-1999 --
-- Emmanuel Briot, Joel Brobecker and Arnaud Charlet --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public --
-- License as published by the Free Software Foundation; either --
-- version 2 of the License, or (at your option) any later version. --
-- --
-- This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public --
-- License along with this library; if not, write to the --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-----------------------------------------------------------------------
with Glib; use Glib;
with Gtk.Box; use Gtk.Box;
with Gtk.Button; use Gtk.Button;
with Gtk.Curve; use Gtk.Curve;
with Gtk.Gamma_Curve; use Gtk.Gamma_Curve;
with Gtk.Handlers; use Gtk.Handlers;
with Gtk; use Gtk;
with Ada.Numerics.Generic_Elementary_Functions;
with Ada.Text_IO;
package body Create_Gamma_Curve is
package Float_P is new Ada.Numerics.Generic_Elementary_Functions (Gfloat);
package Gamma_Cb is new Handlers.Callback (Gtk_Button_Record);
Count : Gint := 0;
Curve : Gtk_Gamma_Curve;
----------
-- Help --
----------
function Help return String is
begin
return "A very specific widget to edit a curve. This is based on a "
& " @bGtk_Curve@B, a modified version of the @bGtk_Drawing_Area@B."
& " You problably won't need to use this...";
end Help;
------------------
-- Change_Curve --
------------------
procedure Change_Curve (Button : access Gtk_Button_Record'Class) is
pragma Warnings (Off, Button);
Max : constant Gint := 127 + (Count mod 4) * 128;
Vec : Gfloat_Array (1 .. Positive (Max));
begin
if (Count mod 4 /= 3) then
Ada.Text_IO.Put_Line ("Redrawing the window with "
& Gint'Image (Max)
& " points");
end if;
Set_Range (Get_Curve (Curve), 0.0, Gfloat (Max), 0.0, Gfloat (Max));
for J in Vec'Range loop
Vec (J) := (127.0 / Float_P.Sqrt (Gfloat (Max)))
* Float_P.Sqrt (Gfloat (J));
end loop;
Set_Vector (Get_Curve (Curve), Vec);
Count := Count + 1;
end Change_Curve;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Button : Gtk_Button;
Box : Gtk_Box;
begin
Set_Label (Frame, "Gamma Curve");
Gtk_New_Vbox (Box, Homogeneous => False, Spacing => 0);
Add (Frame, Box);
Gtk_New (Curve);
Pack_Start (Box, Curve, False, False);
Gtk_New (Button, "Change mode");
Pack_Start (Box, Button, False, False);
Gamma_Cb.Connect (Button, "clicked",
Gamma_Cb.To_Marshaller (Change_Curve'Access));
Gamma_Cb.Emit_By_Name (Button, "clicked");
Show_All (Frame);
end Run;
end Create_Gamma_Curve;
|
