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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 2003 --
-- 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 Gdk.Color; use Gdk.Color;
with Gtk; use Gtk;
with Gtk.Enums; use Gtk.Enums;
with Gtk.Scrolled_Window; use Gtk.Scrolled_Window;
with Gtk.Text_Tag_Table; use Gtk.Text_Tag_Table;
with Gtk.Text_Tag; use Gtk.Text_Tag;
with Gtk.Text_Iter; use Gtk.Text_Iter;
with Gtk.Text_Buffer; use Gtk.Text_Buffer;
with Gtk.Text_View; use Gtk.Text_View;
with Gtk.Frame; use Gtk.Frame;
with Gtk.Widget; use Gtk.Widget;
with Pango.Font; use Pango.Font;
package body Create_Text_View is
procedure Insert_With_Tag
(Buffer : access Gtk_Text_Buffer_Record'Class;
Tag : String;
Text : String);
-- Insert some text with some special highlighting in the buffer.
-- Note: in a real application, one would pass a Gtk_Tag instead of a tag
-- name, to avoid a lookup in the tags table
----------
-- Help --
----------
function Help return String is
begin
return "A @bGtk_Text_View@B widget is a widget used to display any"
& " text graphically. It provides support for changing fonts, colors,"
& " background colors, as well as inserting pixmaps in the text."
& ASCII.LF
& "It is based on the model-view paradigm: the text itself is stored"
& " in a non-graphical object, a @bGtk_Text_Buffer@B, which has"
& " support for traversing the text through @bGtk_Text_Iter@B objects;"
& " This buffer is then associated with one or many @bGtk_Text_View@B"
& " which automatically reflect any change in the buffer."
& ASCII.LF
& "The text is fully editable";
end Help;
---------------------
-- Insert_With_Tag --
---------------------
procedure Insert_With_Tag
(Buffer : access Gtk_Text_Buffer_Record'Class;
Tag : String;
Text : String)
is
T : Gtk_Text_Tag;
Iter, Start_Iter : Gtk_Text_Iter;
Table : Gtk_Text_Tag_Table;
Result : Boolean;
pragma Warnings (Off, Result);
begin
Get_End_Iter (Buffer, Iter);
if Tag = "" then
Insert (Buffer, Iter, Text & ASCII.LF);
else
Table := Get_Tag_Table (Buffer);
T := Lookup (Table, Tag);
Insert (Buffer, Iter, Text & ASCII.LF);
Copy (Source => Iter, Dest => Start_Iter);
Backward_Chars (Start_Iter, Text'Length + 1, Result);
Apply_Tag (Buffer, T, Start_Iter, Iter);
end if;
end Insert_With_Tag;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Buffer : Gtk_Text_Buffer;
Tags : Gtk_Text_Tag_Table;
Tag : Gtk_Text_Tag;
Color : Gdk_Color;
View : Gtk_Text_View;
Scrolled : Gtk_Scrolled_Window;
begin
Gtk_New (Tags);
-- Create the tags that will be used to change the rendering of the
-- text.
Color := Parse ("red");
Alloc (Get_Default_Colormap, Color);
Gtk_New (Tag, "red");
Add (Tags, Tag);
Set_Property (Tag, Foreground_Gdk_Property, Color);
Gtk_New (Tag, "courier");
Add (Tags, Tag);
Set_Property (Tag, Font_Desc_Property, From_String ("Courier bold"));
-- Create the buffer and the views as appropriate
Gtk_New (Buffer, Tags);
Set_Label (Frame, "Text View");
Gtk_New (View, Buffer);
-- Insert some random text
for Lien in 1 .. 50 loop
for Count in 1 .. 10 loop
Insert_With_Tag
(Buffer, "", "A normal line with no special highlight");
end loop;
Insert_With_Tag
(Buffer, "red", "Some text in red, notice the use of tags");
Insert_With_Tag
(Buffer, "courier", "The font can also be changed");
end loop;
-- Insert the view in the frame
Gtk_New (Scrolled);
Set_Policy (Scrolled, Policy_Always, Policy_Always);
Add (Scrolled, View);
Show_All (Scrolled);
Add (Frame, Scrolled);
end Run;
end Create_Text_View;
|
