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<HTML><HEAD><TITLE>terminal_interface-curses-forms-field_types-user.ads</TITLE></HEAD>
<BODY>
<HR><DIV ALIGN="center"><H1> File : terminal_interface-curses-forms-field_types-user.ads </H1></DIV><HR>
<PRE>
<FONT COLOR=green><EM>------------------------------------------------------------------------------</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>-- <A HREF="http://www.gnat.com">GNAT</A> ncurses Binding --</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>-- Terminal_Interface.Curses.Forms.Field_Types.User --</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>-- S P E C --</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>------------------------------------------------------------------------------</EM></FONT>
<FONT COLOR=green><EM>-- Copyright (c) 1998 Free Software Foundation, Inc. --</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>-- Permission is hereby granted, free of charge, to any person obtaining a --</EM></FONT>
<FONT COLOR=green><EM>-- copy of this software and associated documentation files (the --</EM></FONT>
<FONT COLOR=green><EM>-- "Software"), to deal in the Software without restriction, including --</EM></FONT>
<FONT COLOR=green><EM>-- without limitation the rights to use, copy, modify, merge, publish, --</EM></FONT>
<FONT COLOR=green><EM>-- distribute, distribute with modifications, sublicense, and/or sell --</EM></FONT>
<FONT COLOR=green><EM>-- copies of the Software, and to permit persons to whom the Software is --</EM></FONT>
<FONT COLOR=green><EM>-- furnished to do so, subject to the following conditions: --</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>-- The above copyright notice and this permission notice shall be included --</EM></FONT>
<FONT COLOR=green><EM>-- in all copies or substantial portions of the Software. --</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --</EM></FONT>
<FONT COLOR=green><EM>-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --</EM></FONT>
<FONT COLOR=green><EM>-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --</EM></FONT>
<FONT COLOR=green><EM>-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --</EM></FONT>
<FONT COLOR=green><EM>-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --</EM></FONT>
<FONT COLOR=green><EM>-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --</EM></FONT>
<FONT COLOR=green><EM>-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --</EM></FONT>
<FONT COLOR=green><EM>-- --</EM></FONT>
<FONT COLOR=green><EM>-- Except as contained in this notice, the name(s) of the above copyright --</EM></FONT>
<FONT COLOR=green><EM>-- holders shall not be used in advertising or otherwise to promote the --</EM></FONT>
<FONT COLOR=green><EM>-- sale, use or other dealings in this Software without prior written --</EM></FONT>
<FONT COLOR=green><EM>-- authorization. --</EM></FONT>
<FONT COLOR=green><EM>------------------------------------------------------------------------------</EM></FONT>
<FONT COLOR=green><EM>-- Author: <A HREF="http://www.familiepfeifer.de/juergen">Jürgen Pfeifer</A>, 1996</EM></FONT>
<FONT COLOR=green><EM>-- Contact: <A HREF="http://www.familiepfeifer.de/Contact.aspx?Lang=en">www.familiepfeifer.de/Contact.aspx?Lang=en</A></EM></FONT>
<FONT COLOR=green><EM>-- Version Control:</EM></FONT>
<FONT COLOR=green><EM>-- @Revision: 1.10 @</EM></FONT>
<FONT COLOR=green><EM>-- Binding Version 01.00</EM></FONT>
<FONT COLOR=green><EM>------------------------------------------------------------------------------</EM></FONT>
<b>with</b> <A HREF="interfac__ads.htm#23_9">Interfaces</A>.C;
<b>package</b> <A HREF="terminal_interface__ads.htm#42_9">Terminal_Interface</A>.<A HREF="terminal_interface-curses__ads.htm#49_28">Curses</A>.<A HREF="terminal_interface-curses-forms__ads.htm#49_35">Forms</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#44_41">Field_Types</A>.<A HREF="terminal_interface-curses-forms-field_types-user__adb.htm#46_58">User</A><FONT COLOR=red><A NAME="44_53"></A></FONT> <b>is</b>
<b>pragma</b> Preelaborate (<A HREF="terminal_interface__ads.htm#42_9">Terminal_Interface</A>.<A HREF="terminal_interface-curses__ads.htm#49_28">Curses</A>.<A HREF="terminal_interface-curses-forms__ads.htm#49_35">Forms</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#44_41">Field_Types</A>.<A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#44_53">User</A>);
<b>use</b> <b>type</b> <A HREF="interfac__ads.htm#23_9">Interfaces</A>.C.int;
<b>subtype</b> <FONT COLOR=red><A NAME="47_12">C_Int</A></FONT> <b>is</b> <A HREF="interfac__ads.htm#23_9">Interfaces</A>.C.int;
<b>type</b> <FONT COLOR=red><A NAME="49_9">User_Defined_Field_Type</A></FONT> <b>is</b> <b>abstract</b> <b>new</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#53_9">Field_Type</A> <b>with</b> <b>null</b> <b>record</b>;
<FONT COLOR=green><EM>-- This is the root of the mechanism we use to create field types in</EM></FONT>
<FONT COLOR=green><EM>-- Ada95. You should your own type derive from this one and implement</EM></FONT>
<FONT COLOR=green><EM>-- the Field_Check and Character_Check functions for your own type.</EM></FONT>
<b>type</b> <FONT COLOR=red><A NAME="54_9">User_Defined_Field_Type_Access</A></FONT> <b>is</b> <b>access</b> <b>all</b>
<A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#49_9">User_Defined_Field_Type</A>'Class;
<b>function</b> <FONT COLOR=red><A NAME="57_13">Field_Check</A></FONT>
(<FONT COLOR=red><A NAME="58_7">Fld</A></FONT> : <A HREF="terminal_interface-curses-forms__ads.htm#56_9">Field</A>;
<FONT COLOR=red><A NAME="59_7">Typ</A></FONT> : <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#49_9">User_Defined_Field_Type</A>) <b>return</b> Boolean
<b>is</b> <b>abstract</b>;
<FONT COLOR=green><EM>-- If True is returned, the field is considered valid, otherwise it is</EM></FONT>
<FONT COLOR=green><EM>-- invalid.</EM></FONT>
<b>function</b> <FONT COLOR=red><A NAME="64_13">Character_Check</A></FONT>
(<FONT COLOR=red><A NAME="65_7">Ch</A></FONT> : Character;
<FONT COLOR=red><A NAME="66_7">Typ</A></FONT> : <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#49_9">User_Defined_Field_Type</A>) <b>return</b> Boolean
<b>is</b> <b>abstract</b>;
<FONT COLOR=green><EM>-- If True is returned, the character is considered as valid for the</EM></FONT>
<FONT COLOR=green><EM>-- field, otherwise as invalid.</EM></FONT>
<b>procedure</b> <A HREF="terminal_interface-curses-forms-field_types-user__adb.htm#50_14">Set_Field_Type</A><FONT COLOR=red><A NAME="71_14"></A></FONT> (<FONT COLOR=red><A NAME="71_30">Fld</A></FONT> : <b>in</b> <A HREF="terminal_interface-curses-forms__ads.htm#56_9">Field</A>;
<FONT COLOR=red><A NAME="72_30">Typ</A></FONT> : <b>in</b> <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#49_9">User_Defined_Field_Type</A>);
<FONT COLOR=green><EM>-- This should work for all types derived from User_Defined_Field_Type.</EM></FONT>
<FONT COLOR=green><EM>-- No need to reimplement it for your derived type.</EM></FONT>
<FONT COLOR=green><EM>-- +----------------------------------------------------------------------</EM></FONT>
<FONT COLOR=green><EM>-- | Private Part.</EM></FONT>
<FONT COLOR=green><EM>-- | Used by the Choice child package.</EM></FONT>
<b>private</b>
<b>use</b> <b>type</b> <A HREF="interfac__ads.htm#23_9">Interfaces</A>.C.int;
<b>function</b> <A HREF="terminal_interface-curses-forms-field_types-user__adb.htm#108_13">C_Generic_Type</A><FONT COLOR=red><A NAME="82_13"></A></FONT> <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#133_9">C_Field_Type</A>;
<b>function</b> <A HREF="terminal_interface-curses-forms-field_types-user__adb.htm#84_13">Generic_Field_Check</A><FONT COLOR=red><A NAME="84_13"></A></FONT> (<FONT COLOR=red><A NAME="84_34">Fld</A></FONT> : <A HREF="terminal_interface-curses-forms__ads.htm#56_9">Field</A>;
<FONT COLOR=red><A NAME="85_34">Usr</A></FONT> : System.Address) <b>return</b> <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#47_12">C_Int</A>;
<b>pragma</b> Convention (C, <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#84_13">Generic_Field_Check</A>);
<FONT COLOR=green><EM>-- This is the generic Field_Check_Function for the low-level fieldtype</EM></FONT>
<FONT COLOR=green><EM>-- representing all the User_Defined_Field_Type derivates. It routes</EM></FONT>
<FONT COLOR=green><EM>-- the call to the Field_Check implementation for the type.</EM></FONT>
<b>function</b> <A HREF="terminal_interface-curses-forms-field_types-user__adb.htm#95_13">Generic_Char_Check</A><FONT COLOR=red><A NAME="91_13"></A></FONT> (<FONT COLOR=red><A NAME="91_33">Ch</A></FONT> : <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#47_12">C_Int</A>;
<FONT COLOR=red><A NAME="92_33">Usr</A></FONT> : System.Address) <b>return</b> <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#47_12">C_Int</A>;
<b>pragma</b> Convention (C, <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#91_13">Generic_Char_Check</A>);
<FONT COLOR=green><EM>-- This is the generic Char_Check_Function for the low-level fieldtype</EM></FONT>
<FONT COLOR=green><EM>-- representing all the User_Defined_Field_Type derivates. It routes</EM></FONT>
<FONT COLOR=green><EM>-- the call to the Character_Check implementation for the type.</EM></FONT>
<b>end</b> Terminal_Interface.Curses.Forms.Field_Types.User;
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