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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 2006 AdaCore --
-- --
-- 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 Glib.Properties; use Glib.Properties;
with Gtk.Button; use Gtk.Button;
with Gtk.Box; use Gtk.Box;
with Gtk.Frame; use Gtk.Frame;
with Gtk.Cell_Renderer; use Gtk.Cell_Renderer;
with Gtk.Cell_Renderer_Text; use Gtk.Cell_Renderer_Text;
with Gtk.Cell_View; use Gtk.Cell_View;
with Gtk.Cell_Layout; use Gtk.Cell_Layout;
with Gtk.List_Store; use Gtk.List_Store;
with Gtk.Tree_Model; use Gtk.Tree_Model;
with Gtk.Widget; use Gtk.Widget;
with Gtkada.Handlers; use Gtkada.Handlers;
package body Create_Cell_View is
Column_0 : constant := 0;
Column_1 : constant := 1;
-- The columns in the model
Path : Gtk_Tree_Path;
procedure Move_To_Previous (View : access Gtk_Widget_Record'Class);
procedure Move_To_Next (View : access Gtk_Widget_Record'Class);
-- Display the previous or next function in the cell view
procedure Compute_Column_3
(Cell_Layout : Gtk_Cell_Layout;
Cell : access Gtk.Cell_Renderer.Gtk_Cell_Renderer_Record'Class;
Model : access Gtk.Tree_Model.Gtk_Tree_Model_Record'Class;
Iter : Gtk.Tree_Model.Gtk_Tree_Iter);
-- Compute dynamically what to display in the third column of the view,
-- based on the contents of the model. In this example, this is a
-- concatenation of the two model columns
----------
-- Help --
----------
function Help return String is
begin
return "A @bGtk_Cell_View@B provides a view of a single row of a tree"
& " model." & ASCII.LF
& "In this example, the first two columns displayed come straight from"
& " the model, where they are stored as a string and an integer. The"
& " third column is computed dynamically, and doesn't exist in the"
& " model itself.";
end Help;
----------------------
-- Move_To_Previous --
----------------------
procedure Move_To_Previous (View : access Gtk_Widget_Record'Class) is
begin
if Prev (Path) then
Set_Displayed_Row (Gtk_Cell_View (View), Path);
end if;
end Move_To_Previous;
------------------
-- Move_To_Next --
------------------
procedure Move_To_Next (View : access Gtk_Widget_Record'Class) is
begin
Next (Path);
Set_Displayed_Row (Gtk_Cell_View (View), Path);
end Move_To_Next;
----------------------
-- Compute_Column_3 --
----------------------
procedure Compute_Column_3
(Cell_Layout : Gtk_Cell_Layout;
Cell : access Gtk.Cell_Renderer.Gtk_Cell_Renderer_Record'Class;
Model : access Gtk.Tree_Model.Gtk_Tree_Model_Record'Class;
Iter : Gtk.Tree_Model.Gtk_Tree_Iter)
is
pragma Unreferenced (Cell_Layout);
begin
Set_Property
(Cell, Gtk.Cell_Renderer_Text.Text_Property,
"--" & Get_String (Model, Iter, 0) & "--"
& Gint'Image (Get_Int (Model, Iter, 1)) & "--");
end Compute_Column_3;
---------
-- Run --
---------
procedure Run (Frame : access Gtk.Frame.Gtk_Frame_Record'Class) is
Box, Hbox : Gtk_Box;
Prev, Next : Gtk_Button;
Model : Gtk_List_Store;
Iter : Gtk_Tree_Iter;
View : Gtk_Cell_View;
Render : Gtk_Cell_Renderer_Text;
begin
Set_Label (Frame, "Cell View");
Gtk_New_Vbox (Box, Homogeneous => False);
Add (Frame, Box);
Gtk_New_Hbox (Hbox, Homogeneous => True);
Pack_Start (Box, Hbox, Expand => False);
Gtk_New (Prev, "Previous row");
Pack_Start (Hbox, Prev, Expand => False);
Gtk_New (Next, "Next row");
Pack_Start (Hbox, Next, Expand => False);
-- Create a model. This is a set of rows, each with two columns in this
-- specific case.
Gtk_New (Model, (Column_0 => GType_String,
Column_1 => GType_Int));
Append (Model, Iter);
Set (Model, Iter, Column_0, "row 1");
Set (Model, Iter, Column_1, 1);
Append (Model, Iter);
Set (Model, Iter, Column_0, "row 2");
Set (Model, Iter, Column_1, 2);
Append (Model, Iter);
Set (Model, Iter, Column_0, "row 3");
Set (Model, Iter, Column_1, 3);
-- Create the cell view. We need to specify the renderer that will show
-- the columns of the model. Note that we do not have to display all
-- the columns.
-- Adding renderers is done through the Gtk_Cell_Layout interface, not
-- directly through Gtk_Cell_View.
Gtk_New (View);
Pack_Start (Box, View, Expand => True, Fill => False);
Set_Model (View, Gtk_Tree_Model (Model));
Gtk_New (Render);
Pack_Start (+View, Render, Expand => True);
Add_Attribute (+View, Render, "text", Column_0);
Gtk_New (Render);
Pack_Start (+View, Render, Expand => True);
Add_Attribute (+View, Render, "text", Column_1);
-- The third column in the view is computed dynamically from the others
-- in the model, and doesn't have to exist in the model itself.
Gtk_New (Render);
Pack_Start (+View, Render, Expand => True);
Set_Cell_Data_Func (+View, Render, Compute_Column_3'Access);
Path := Gtk_New_First;
Set_Displayed_Row (View, Path);
Widget_Callback.Object_Connect
(Prev, "clicked", Move_To_Previous'Access, View);
Widget_Callback.Object_Connect
(Next, "clicked", Move_To_Next'Access, View);
Show_All (Frame);
end Run;
end Create_Cell_View;
|
