1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding Samples --
5 -- Sample.Keyboard_Handler --
9 ------------------------------------------------------------------------------
10 -- Copyright 2020 Thomas E. Dickey --
11 -- Copyright 1998-2006,2011 Free Software Foundation, Inc. --
13 -- Permission is hereby granted, free of charge, to any person obtaining a --
14 -- copy of this software and associated documentation files (the --
15 -- "Software"), to deal in the Software without restriction, including --
16 -- without limitation the rights to use, copy, modify, merge, publish, --
17 -- distribute, distribute with modifications, sublicense, and/or sell --
18 -- copies of the Software, and to permit persons to whom the Software is --
19 -- furnished to do so, subject to the following conditions: --
21 -- The above copyright notice and this permission notice shall be included --
22 -- in all copies or substantial portions of the Software. --
24 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
25 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
26 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
27 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
28 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
29 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
30 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
32 -- Except as contained in this notice, the name(s) of the above copyright --
33 -- holders shall not be used in advertising or otherwise to promote the --
34 -- sale, use or other dealings in this Software without prior written --
36 ------------------------------------------------------------------------------
37 -- Author: Juergen Pfeifer, 1996
40 -- $Date: 2020/02/02 23:34:34 $
41 -- Binding Version 01.00
42 ------------------------------------------------------------------------------
43 with Ada.Strings; use Ada.Strings;
44 with Ada.Strings.Fixed; use Ada.Strings.Fixed;
45 with Ada.Strings.Maps.Constants; use Ada.Strings.Maps.Constants;
46 with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
47 with Ada.Characters.Handling; use Ada.Characters.Handling;
49 with Terminal_Interface.Curses.Panels; use Terminal_Interface.Curses.Panels;
50 with Terminal_Interface.Curses.Forms; use Terminal_Interface.Curses.Forms;
51 with Terminal_Interface.Curses.Forms.Field_Types.Enumeration;
52 use Terminal_Interface.Curses.Forms.Field_Types.Enumeration;
54 with Sample.Header_Handler; use Sample.Header_Handler;
55 with Sample.Form_Demo.Aux; use Sample.Form_Demo.Aux;
56 with Sample.Manifest; use Sample.Manifest;
57 with Sample.Form_Demo.Handler;
59 -- This package contains a centralized keyboard handler used throughout
60 -- this example. The handler establishes a timeout mechanism that provides
61 -- periodical updates of the common header lines used in this example.
64 package body Sample.Keyboard_Handler is
66 In_Command : Boolean := False;
68 function Get_Key (Win : Window := Standard_Window) return Real_Key_Code
72 function Command return Real_Key_Code;
74 function Command return Real_Key_Code
76 function My_Driver (F : Form;
78 P : Panel) return Boolean;
79 package Fh is new Sample.Form_Demo.Handler (My_Driver);
81 type Label_Array is array (Label_Number) of String (1 .. 8);
85 FA : Field_Array_Access := new Field_Array'
86 (Make (0, 0, "Command:"),
87 Make (Top => 0, Left => 9, Width => Columns - 11),
90 K : Real_Key_Code := Key_None;
93 function My_Driver (F : Form;
95 P : Panel) return Boolean
99 if P = Null_Panel then
100 raise Panel_Exception;
102 if C in User_Key_Code'Range and then C = QUIT then
103 if Driver (F, F_Validate_Field) = Form_Ok then
107 elsif C in Normal_Key_Code'Range then
108 Ch := Character'Val (C);
109 if Ch = LF or else Ch = CR then
110 if Driver (F, F_Validate_Field) = Form_Ok then
112 Buffer : String (1 .. Positive (Columns - 11));
113 Cmdc : String (1 .. 8);
115 Get_Buffer (Fld => FA.all (2), Str => Buffer);
117 if Buffer (1) /= ' ' then
118 Cmdc := To_Upper (Buffer (Cmdc'Range));
119 for I in Labels'Range loop
120 if Cmdc = Labels (I) then
121 K := Function_Key_Code
122 (Function_Key_Number (I));
137 for I in Label_Number'Range loop
138 Get_Soft_Label_Key (I, Labels (I));
139 Trim (Labels (I), Left);
140 Translate (Labels (I), Upper_Case_Map);
141 if Labels (I) (1) /= ' ' then
145 if N > 0 then -- some labels were really set
147 Enum_Info : Enumeration_Info (N);
148 Enum_Field : Enumeration_Field;
149 J : Positive := Enum_Info.Names'First;
151 Frm : Form := Create (FA);
154 for I in Label_Number'Range loop
155 if Labels (I) (1) /= ' ' then
156 Enum_Info.Names (J) := new String'(Labels (I));
160 Enum_Field := Create (Enum_Info, True);
161 Set_Field_Type (FA.all (2), Enum_Field);
162 Set_Background (FA.all (2), Normal_Video);
164 Fh.Drive_Me (Frm, Lines - 3, 0);
166 Update_Panels; Update_Screen;
175 Set_Timeout_Mode (Win, Delayed, 30000);
177 K := Get_Keystroke (Win);
178 if K = Key_None then -- a timeout occurred
179 Update_Header_Window;
180 elsif K = 3 and then not In_Command then -- CTRL-C
182 exit when K /= Key_None;
190 procedure Init_Keyboard_Handler is
193 end Init_Keyboard_Handler;
195 end Sample.Keyboard_Handler;