source: ncurses/vendor/current/Ada95/samples/sample-menu_demo-aux.adb@ 1910

Last change on this file since 1910 was 1910, checked in by Silvan Scherrer, 8 years ago

ncurses: import vendor version 5.9
File size: 8.7 KB
Line 
1------------------------------------------------------------------------------
2-- --
3-- GNAT ncurses Binding Samples --
4-- --
5-- Sample.Menu_Demo.Aux --
6-- --
7-- B O D Y --
8-- --
9------------------------------------------------------------------------------
10-- Copyright (c) 1998-2006,2009 Free Software Foundation, Inc. --
11-- --
12-- Permission is hereby granted, free of charge, to any person obtaining a --
13-- copy of this software and associated documentation files (the --
14-- "Software"), to deal in the Software without restriction, including --
15-- without limitation the rights to use, copy, modify, merge, publish, --
16-- distribute, distribute with modifications, sublicense, and/or sell --
17-- copies of the Software, and to permit persons to whom the Software is --
18-- furnished to do so, subject to the following conditions: --
19-- --
20-- The above copyright notice and this permission notice shall be included --
21-- in all copies or substantial portions of the Software. --
22-- --
23-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
24-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
25-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
26-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
27-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
28-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
29-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
30-- --
31-- Except as contained in this notice, the name(s) of the above copyright --
32-- holders shall not be used in advertising or otherwise to promote the --
33-- sale, use or other dealings in this Software without prior written --
34-- authorization. --
35------------------------------------------------------------------------------
36-- Author: Juergen Pfeifer, 1996
37-- Version Control
38-- $Revision: 1.14 $
39-- $Date: 2009/12/26 17:38:58 $
40-- Binding Version 01.00
41------------------------------------------------------------------------------
42with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
43
44with Sample.Manifest; use Sample.Manifest;
45with Sample.Helpers; use Sample.Helpers;
46with Sample.Keyboard_Handler; use Sample.Keyboard_Handler;
47with Sample.Explanation; use Sample.Explanation;
48
49package body Sample.Menu_Demo.Aux is
50
51 procedure Geometry (M : Menu;
52 L : out Line_Count;
53 C : out Column_Count;
54 Y : out Line_Position;
55 X : out Column_Position;
56 Fy : out Line_Position;
57 Fx : out Column_Position);
58
59 procedure Geometry (M : Menu;
60 L : out Line_Count; -- Lines used for menu
61 C : out Column_Count; -- Columns used for menu
62 Y : out Line_Position; -- Proposed Line for menu
63 X : out Column_Position; -- Proposed Column for menu
64 Fy : out Line_Position; -- Vertical inner frame
65 Fx : out Column_Position) -- Horiz. inner frame
66 is
67 Spc_Desc : Column_Position; -- spaces between description and item
68 begin
69 Set_Mark (M, Menu_Marker);
70
71 Spacing (M, Spc_Desc, Fy, Fx);
72 Scale (M, L, C);
73
74 Fx := Fx + Column_Position (Fy - 1); -- looks a bit nicer
75
76 L := L + 2 * Fy; -- count for frame at top and bottom
77 C := C + 2 * Fx; -- "
78
79 -- Calculate horizontal coordinate at the screen center
80 X := (Columns - C) / 2;
81 Y := 1; -- always startin line 1
82
83 end Geometry;
84
85 procedure Geometry (M : Menu;
86 L : out Line_Count; -- Lines used for menu
87 C : out Column_Count; -- Columns used for menu
88 Y : out Line_Position; -- Proposed Line for menu
89 X : out Column_Position) -- Proposed Column for menu
90 is
91 Fy : Line_Position;
92 Fx : Column_Position;
93 begin
94 Geometry (M, L, C, Y, X, Fy, Fx);
95 end Geometry;
96
97 function Create (M : Menu;
98 Title : String;
99 Lin : Line_Position;
100 Col : Column_Position) return Panel
101 is
102 W, S : Window;
103 L : Line_Count;
104 C : Column_Count;
105 Y, Fy : Line_Position;
106 X, Fx : Column_Position;
107 Pan : Panel;
108 begin
109 Geometry (M, L, C, Y, X, Fy, Fx);
110 W := New_Window (L, C, Lin, Col);
111 Set_Meta_Mode (W);
112 Set_KeyPad_Mode (W);
113 if Has_Colors then
114 Set_Background (Win => W,
115 Ch => (Ch => ' ',
116 Color => Menu_Back_Color,
117 Attr => Normal_Video));
118 Set_Foreground (Men => M, Color => Menu_Fore_Color);
119 Set_Background (Men => M, Color => Menu_Back_Color);
120 Set_Grey (Men => M, Color => Menu_Grey_Color);
121 Erase (W);
122 end if;
123 S := Derived_Window (W, L - Fy, C - Fx, Fy, Fx);
124 Set_Meta_Mode (S);
125 Set_KeyPad_Mode (S);
126 Box (W);
127 Set_Window (M, W);
128 Set_Sub_Window (M, S);
129 if Title'Length > 0 then
130 Window_Title (W, Title);
131 end if;
132 Pan := New_Panel (W);
133 Post (M);
134 return Pan;
135 end Create;
136
137 procedure Destroy (M : Menu;
138 P : in out Panel)
139 is
140 W, S : Window;
141 begin
142 W := Get_Window (M);
143 S := Get_Sub_Window (M);
144 Post (M, False);
145 Erase (W);
146 Delete (P);
147 Set_Window (M, Null_Window);
148 Set_Sub_Window (M, Null_Window);
149 Delete (S);
150 Delete (W);
151 Update_Panels;
152 end Destroy;
153
154 function Get_Request (M : Menu; P : Panel) return Key_Code
155 is
156 W : constant Window := Get_Window (M);
157 K : Real_Key_Code;
158 Ch : Character;
159 begin
160 Top (P);
161 loop
162 K := Get_Key (W);
163 if K in Special_Key_Code'Range then
164 case K is
165 when HELP_CODE => Explain_Context;
166 when EXPLAIN_CODE => Explain ("MENUKEYS");
167 when Key_Home => return REQ_FIRST_ITEM;
168 when QUIT_CODE => return QUIT;
169 when Key_Cursor_Down => return REQ_DOWN_ITEM;
170 when Key_Cursor_Up => return REQ_UP_ITEM;
171 when Key_Cursor_Left => return REQ_LEFT_ITEM;
172 when Key_Cursor_Right => return REQ_RIGHT_ITEM;
173 when Key_End => return REQ_LAST_ITEM;
174 when Key_Backspace => return REQ_BACK_PATTERN;
175 when Key_Next_Page => return REQ_SCR_DPAGE;
176 when Key_Previous_Page => return REQ_SCR_UPAGE;
177 when others => return K;
178 end case;
179 elsif K in Normal_Key_Code'Range then
180 Ch := Character'Val (K);
181 case Ch is
182 when CAN => return QUIT; -- CTRL-X
183 when SO => return REQ_NEXT_ITEM; -- CTRL-N
184 when DLE => return REQ_PREV_ITEM; -- CTRL-P
185 when NAK => return REQ_SCR_ULINE; -- CTRL-U
186 when EOT => return REQ_SCR_DLINE; -- CTRL-D
187 when ACK => return REQ_SCR_DPAGE; -- CTRL-F
188 when STX => return REQ_SCR_UPAGE; -- CTRL-B
189 when EM => return REQ_CLEAR_PATTERN; -- CTRL-Y
190 when BS => return REQ_BACK_PATTERN; -- CTRL-H
191 when SOH => return REQ_NEXT_MATCH; -- CTRL-A
192 when ENQ => return REQ_PREV_MATCH; -- CTRL-E
193 when DC4 => return REQ_TOGGLE_ITEM; -- CTRL-T
194
195 when CR | LF => return SELECT_ITEM;
196 when others => return K;
197 end case;
198 else
199 return K;
200 end if;
201 end loop;
202 end Get_Request;
203
204end Sample.Menu_Demo.Aux;
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