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Diffstat (limited to 'ncurses-5.3/Ada95/src/terminal_interface-curses-forms-field_types-user-choice.adb')
| -rw-r--r-- | ncurses-5.3/Ada95/src/terminal_interface-curses-forms-field_types-user-choice.adb | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/ncurses-5.3/Ada95/src/terminal_interface-curses-forms-field_types-user-choice.adb b/ncurses-5.3/Ada95/src/terminal_interface-curses-forms-field_types-user-choice.adb new file mode 100644 index 0000000..129ea2d --- /dev/null +++ b/ncurses-5.3/Ada95/src/terminal_interface-curses-forms-field_types-user-choice.adb @@ -0,0 +1,111 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT ncurses Binding -- +-- -- +-- Terminal_Interface.Curses.Forms.Field_Types.User.Choice -- +-- -- +-- B O D Y -- +-- -- +------------------------------------------------------------------------------ +-- Copyright (c) 1998 Free Software Foundation, Inc. -- +-- -- +-- Permission is hereby granted, free of charge, to any person obtaining a -- +-- copy of this software and associated documentation files (the -- +-- "Software"), to deal in the Software without restriction, including -- +-- without limitation the rights to use, copy, modify, merge, publish, -- +-- distribute, distribute with modifications, sublicense, and/or sell -- +-- copies of the Software, and to permit persons to whom the Software is -- +-- furnished to do so, subject to the following conditions: -- +-- -- +-- The above copyright notice and this permission notice shall be included -- +-- in all copies or substantial portions of the Software. -- +-- -- +-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -- +-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -- +-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -- +-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -- +-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -- +-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR -- +-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. -- +-- -- +-- Except as contained in this notice, the name(s) of the above copyright -- +-- holders shall not be used in advertising or otherwise to promote the -- +-- sale, use or other dealings in this Software without prior written -- +-- authorization. -- +------------------------------------------------------------------------------ +-- Author: Juergen Pfeifer, 1996 +-- Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en +-- Version Control: +-- $Revision$ +-- Binding Version 01.00 +------------------------------------------------------------------------------ +with Ada.Unchecked_Conversion; +with Interfaces.C; +with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux; + +package body Terminal_Interface.Curses.Forms.Field_Types.User.Choice is + + use type Interfaces.C.int; + + function To_Argument_Access is new Ada.Unchecked_Conversion + (System.Address, Argument_Access); + + function Generic_Next (Fld : Field; + Usr : System.Address) return C_Int + is + Result : Boolean; + Udf : User_Defined_Field_Type_With_Choice_Access := + User_Defined_Field_Type_With_Choice_Access + (To_Argument_Access (Usr).Typ); + begin + Result := Next (Fld, Udf.all); + return C_Int (Boolean'Pos (Result)); + end Generic_Next; + + function Generic_Prev (Fld : Field; + Usr : System.Address) return C_Int + is + Result : Boolean; + Udf : User_Defined_Field_Type_With_Choice_Access := + User_Defined_Field_Type_With_Choice_Access + (To_Argument_Access (Usr).Typ); + begin + Result := Previous (Fld, Udf.all); + return C_Int (Boolean'Pos (Result)); + end Generic_Prev; + + -- ----------------------------------------------------------------------- + -- + function C_Generic_Choice return C_Field_Type + is + Res : Eti_Error; + T : C_Field_Type; + begin + if M_Generic_Choice = Null_Field_Type then + T := New_Fieldtype (Generic_Field_Check'Access, + Generic_Char_Check'Access); + if T = Null_Field_Type then + raise Form_Exception; + else + Res := Set_Fieldtype_Arg (T, + Make_Arg'Access, + Copy_Arg'Access, + Free_Arg'Access); + if Res /= E_Ok then + Eti_Exception (Res); + end if; + + Res := Set_Fieldtype_Choice (T, + Generic_Next'Access, + Generic_Prev'Access); + if Res /= E_Ok then + Eti_Exception (Res); + end if; + end if; + M_Generic_Choice := T; + end if; + pragma Assert (M_Generic_Choice /= Null_Field_Type); + return M_Generic_Choice; + end C_Generic_Choice; + +end Terminal_Interface.Curses.Forms.Field_Types.User.Choice; |