------------------------------------------------------------------------------ -- -- -- GNAT ncurses Binding Samples -- -- -- -- Sample.Keyboard_Handler -- -- -- -- B O D Y -- -- -- ------------------------------------------------------------------------------ -- Copyright (c) 1998,2004 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 -- Version Control -- $Revision$ -- $Date$ -- Binding Version 01.00 ------------------------------------------------------------------------------ with Ada.Strings; use Ada.Strings; with Ada.Strings.Fixed; use Ada.Strings.Fixed; with Ada.Strings.Maps.Constants; use Ada.Strings.Maps.Constants; with Ada.Characters.Latin_1; use Ada.Characters.Latin_1; with Ada.Characters.Handling; use Ada.Characters.Handling; with Terminal_Interface.Curses.Panels; use Terminal_Interface.Curses.Panels; with Terminal_Interface.Curses.Forms; use Terminal_Interface.Curses.Forms; with Terminal_Interface.Curses.Forms.Field_Types.Enumeration; use Terminal_Interface.Curses.Forms.Field_Types.Enumeration; with Sample.Header_Handler; use Sample.Header_Handler; with Sample.Form_Demo.Aux; use Sample.Form_Demo.Aux; with Sample.Manifest; use Sample.Manifest; with Sample.Form_Demo.Handler; -- This package contains a centralized keyboard handler used throughout -- this example. The handler establishes a timeout mechanism that provides -- periodical updates of the common header lines used in this example. -- package body Sample.Keyboard_Handler is In_Command : Boolean := False; function Get_Key (Win : Window := Standard_Window) return Real_Key_Code is K : Real_Key_Code; function Command return Real_Key_Code; function Command return Real_Key_Code is function My_Driver (F : Form; C : Key_Code; P : Panel) return Boolean; package Fh is new Sample.Form_Demo.Handler (My_Driver); type Label_Array is array (Label_Number) of String (1 .. 8); Labels : Label_Array; FA : Field_Array_Access := new Field_Array' (Make (0, 0, "Command:"), Make (Top => 0, Left => 9, Width => Columns - 11), Null_Field); K : Real_Key_Code := Key_None; N : Natural := 0; function My_Driver (F : Form; C : Key_Code; P : Panel) return Boolean is Ch : Character; begin if P = Null_Panel then raise Panel_Exception; end if; if C in User_Key_Code'Range and then C = QUIT then if Driver (F, F_Validate_Field) = Form_Ok then K := Key_None; return True; end if; elsif C in Normal_Key_Code'Range then Ch := Character'Val (C); if Ch = LF or else Ch = CR then if Driver (F, F_Validate_Field) = Form_Ok then declare Buffer : String (1 .. Positive (Columns - 11)); Cmdc : String (1 .. 8); begin Get_Buffer (Fld => FA (2), Str => Buffer); Trim (Buffer, Left); if Buffer (1) /= ' ' then Cmdc := To_Upper (Buffer (Cmdc'Range)); for I in Labels'Range loop if Cmdc = Labels (I) then K := Function_Key_Code (Function_Key_Number (I)); exit; end if; end loop; end if; return True; end; end if; end if; end if; return False; end My_Driver; begin In_Command := True; for I in Label_Number'Range loop Get_Soft_Label_Key (I, Labels (I)); Trim (Labels (I), Left); Translate (Labels (I), Upper_Case_Map); if Labels (I) (1) /= ' ' then N := N + 1; end if; end loop; if N > 0 then -- some labels were really set declare Enum_Info : Enumeration_Info (N); Enum_Field : Enumeration_Field; J : Positive := Enum_Info.Names'First; Frm : Form := Create (FA); begin for I in Label_Number'Range loop if Labels (I) (1) /= ' ' then Enum_Info.Names (J) := new String'(Labels (I)); J := J + 1; end if; end loop; Enum_Field := Create (Enum_Info, True); Set_Field_Type (FA (2), Enum_Field); Set_Background (FA (2), Normal_Video); Fh.Drive_Me (Frm, Lines - 3, 0); Delete (Frm); Update_Panels; Update_Screen; end; end if; Free (FA, True); In_Command := False; return K; end Command; begin Set_Timeout_Mode (Win, Delayed, 30000); loop K := Get_Keystroke (Win); if K = Key_None then -- a timeout occured Update_Header_Window; elsif K = 3 and then not In_Command then -- CTRL-C K := Command; exit when K /= Key_None; else exit; end if; end loop; return K; end Get_Key; procedure Init_Keyboard_Handler is begin null; end Init_Keyboard_Handler; end Sample.Keyboard_Handler;