1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding --
5 -- Terminal_Interface.Curses.Forms.Field_Types.User --
9 ------------------------------------------------------------------------------
10 -- Copyright (c) 1998 Free Software Foundation, Inc. --
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: --
20 -- The above copyright notice and this permission notice shall be included --
21 -- in all copies or substantial portions of the Software. --
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. --
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 --
35 ------------------------------------------------------------------------------
36 -- Author: Juergen Pfeifer, 1996
39 -- Binding Version 01.00
40 ------------------------------------------------------------------------------
43 package Terminal_Interface.Curses.Forms.Field_Types.User is
44 pragma Preelaborate (Terminal_Interface.Curses.Forms.Field_Types.User);
45 use type Interfaces.C.int;
46 subtype C_Int is Interfaces.C.int;
48 type User_Defined_Field_Type is abstract new Field_Type with null record;
49 -- This is the root of the mechanism we use to create field types in
50 -- Ada95. You should your own type derive from this one and implement
51 -- the Field_Check and Character_Check functions for your own type.
53 type User_Defined_Field_Type_Access is access all
54 User_Defined_Field_Type'Class;
58 Typ : User_Defined_Field_Type) return Boolean
60 -- If True is returned, the field is considered valid, otherwise it is
63 function Character_Check
65 Typ : User_Defined_Field_Type) return Boolean
67 -- If True is returned, the character is considered as valid for the
68 -- field, otherwise as invalid.
70 procedure Set_Field_Type (Fld : in Field;
71 Typ : in User_Defined_Field_Type);
72 -- This should work for all types derived from User_Defined_Field_Type.
73 -- No need to reimplement it for your derived type.
75 -- +----------------------------------------------------------------------
77 -- | Used by the Choice child package.
79 use type Interfaces.C.int;
81 function C_Generic_Type return C_Field_Type;
83 function Generic_Field_Check (Fld : Field;
84 Usr : System.Address) return C_Int;
85 pragma Convention (C, Generic_Field_Check);
86 -- This is the generic Field_Check_Function for the low-level fieldtype
87 -- representing all the User_Defined_Field_Type derivates. It routes
88 -- the call to the Field_Check implementation for the type.
90 function Generic_Char_Check (Ch : C_Int;
91 Usr : System.Address) return C_Int;
92 pragma Convention (C, Generic_Char_Check);
93 -- This is the generic Char_Check_Function for the low-level fieldtype
94 -- representing all the User_Defined_Field_Type derivates. It routes
95 -- the call to the Character_Check implementation for the type.
97 end Terminal_Interface.Curses.Forms.Field_Types.User;