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<HTML><HEAD><TITLE>terminal_interface-curses-forms-field_types-user-choice.ads</TITLE></HEAD><BODY><HR><DIV ALIGN="center"><H1> File : terminal_interface-curses-forms-field_types-user-choice.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.Choice --</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: Juergen Pfeifer, 1996</EM></FONT><FONT COLOR=green><EM>-- Version Control:</EM></FONT><FONT COLOR=green><EM>-- @Revision: 1.11 @</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#41_9">Terminal_Interface</A>.<A HREF="terminal_interface-curses__ads.htm#48_28">Curses</A>.<A HREF="terminal_interface-curses-forms__ads.htm#48_35">Forms</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#43_41">Field_Types</A>.<A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#43_53">User</A>.<FONT COLOR=red><A NAME="43_58">Choice</A></FONT> <b>is</b> <b>pragma</b> Preelaborate (<A HREF="terminal_interface__ads.htm#41_9">Terminal_Interface</A>.<A HREF="terminal_interface-curses__ads.htm#48_28">Curses</A>.<A HREF="terminal_interface-curses-forms__ads.htm#48_35">Forms</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#43_41">Field_Types</A>.<A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#43_53">User</A>.<A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#43_58">Choice</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="48_12">C_Int</A></FONT> <b>is</b> <A HREF="interfac__ads.htm#23_9">Interfaces</A>.C.int; <b>type</b> User_Defined_Field_Type_With_Choice <b>is</b> <b>abstract</b> <b>new</b> <A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#48_9">User_Defined_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 that allow the prev/next mechanism. You should your own type</EM></FONT> <FONT COLOR=green><EM>-- derive from this one and implement the Field_Check, Character_Check</EM></FONT> <FONT COLOR=green><EM>-- Next and Previous functions for your own type.</EM></FONT> <b>type</b> <FONT COLOR=red><A NAME="57_9">User_Defined_Field_Type_With_Choice_Access</A></FONT> <b>is</b> <b>access</b> <b>all</b> User_Defined_Field_Type_With_Choice'Class; <b>function</b> <FONT COLOR=red><A NAME="60_13">Next</A></FONT> (<FONT COLOR=red><A NAME="61_7">Fld</A></FONT> : <A HREF="terminal_interface-curses-forms__ads.htm#55_9">Field</A>; <FONT COLOR=red><A NAME="62_7">Typ</A></FONT> : User_Defined_Field_Type_With_Choice) <b>return</b> Boolean <b>is</b> <b>abstract</b>; <FONT COLOR=green><EM>-- If True is returned, the function successfully generated a next</EM></FONT> <FONT COLOR=green><EM>-- value into the fields buffer.</EM></FONT> <b>function</b> <FONT COLOR=red><A NAME="67_13">Previous</A></FONT> (<FONT COLOR=red><A NAME="68_7">Fld</A></FONT> : <A HREF="terminal_interface-curses-forms__ads.htm#55_9">Field</A>; <FONT COLOR=red><A NAME="69_7">Typ</A></FONT> : User_Defined_Field_Type_With_Choice) <b>return</b> Boolean <b>is</b> <b>abstract</b>; <FONT COLOR=green><EM>-- If True is returned, the function successfully generated a previous</EM></FONT> <FONT COLOR=green><EM>-- value into the fields buffer.</EM></FONT> <FONT COLOR=green><EM>-- +----------------------------------------------------------------------</EM></FONT> <FONT COLOR=green><EM>-- | Private Part.</EM></FONT> <FONT COLOR=green><EM>-- |</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> <FONT COLOR=red><A NAME="80_13">C_Generic_Choice</A></FONT> <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#132_9">C_Field_Type</A>; <b>function</b> <FONT COLOR=red><A NAME="82_13">Generic_Next</A></FONT> (<FONT COLOR=red><A NAME="82_27">Fld</A></FONT> : <A HREF="terminal_interface-curses-forms__ads.htm#55_9">Field</A>; <FONT COLOR=red><A NAME="83_27">Usr</A></FONT> : System.Address) <b>return</b> <A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#48_12">C_Int</A>; <b>pragma</b> Convention (C, <A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#82_13">Generic_Next</A>); <FONT COLOR=green><EM>-- This is the generic next Choice_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 Next implementation for the type.</EM></FONT> <b>function</b> <FONT COLOR=red><A NAME="89_13">Generic_Prev</A></FONT> (<FONT COLOR=red><A NAME="89_27">Fld</A></FONT> : <A HREF="terminal_interface-curses-forms__ads.htm#55_9">Field</A>; <FONT COLOR=red><A NAME="90_27">Usr</A></FONT> : System.Address) <b>return</b> <A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#48_12">C_Int</A>; <b>pragma</b> Convention (C, <A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#89_13">Generic_Prev</A>); <FONT COLOR=green><EM>-- This is the generic prev Choice_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 Previous implementation for the type.</EM></FONT><b>end</b> <A HREF="terminal_interface__ads.htm#41_9">Terminal_Interface</A>.<A HREF="terminal_interface-curses__ads.htm#48_28">Curses</A>.<A HREF="terminal_interface-curses-forms__ads.htm#48_35">Forms</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#43_41">Field_Types</A>.<A HREF="terminal_interface-curses-forms-field_types-user__ads.htm#43_53">User</A>.<A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#43_58">Choice</A><A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#43_58">;</A></PRE></BODY></HTML>⌨️ 快捷键说明
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