release/src/router/libncurses/Ada95/samples/ncurses2-slk_test.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                                 ncurses                                  --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 2000-2009,2011 Free Software Foundation, Inc.              --
  11 --                                                                          --
  12 -- Permission is hereby granted, free of charge, to any person obtaining a  --
  13 -- copy of this software and associated documentation files (the            --
  14 -- "Software"), to deal in the Software without restriction, including      --
  15 -- without limitation the rights to use, copy, modify, merge, publish,      --
  16 -- distribute, distribute with modifications, sublicense, and/or sell       --
  17 -- copies of the Software, and to permit persons to whom the Software is    --
  18 -- furnished to do so, subject to the following conditions:                 --
  19 --                                                                          --
  20 -- The above copyright notice and this permission notice shall be included  --
  21 -- in all copies or substantial portions of the Software.                   --
  22 --                                                                          --
  23 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  --
  24 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               --
  25 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   --
  26 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   --
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  28 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    --
  29 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               --
  30 --                                                                          --
  31 -- Except as contained in this notice, the name(s) of the above copyright   --
  32 -- holders shall not be used in advertising or otherwise to promote the     --
  33 -- sale, use or other dealings in this Software without prior written       --
  34 -- authorization.                                                           --
  35 ------------------------------------------------------------------------------
  36 --  Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
  37 --  Version Control
  38 --  $Revision: 1.9 $
  39 --  $Date: 2011/03/19 12:03:08 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with ncurses2.util; use ncurses2.util;
  43 with Terminal_Interface.Curses; use Terminal_Interface.Curses;
  44
  45 with Ada.Strings.Unbounded;
  46 with Interfaces.C;
  47 with Terminal_Interface.Curses.Aux;
  48
  49 procedure ncurses2.slk_test is
  50    procedure myGet (Win : Window := Standard_Window;
  51                     Str : out Ada.Strings.Unbounded.Unbounded_String;
  52                     Len : Integer := -1);
  53
  54    procedure myGet (Win : Window := Standard_Window;
  55                     Str : out Ada.Strings.Unbounded.Unbounded_String;
  56                     Len : Integer := -1)
  57    is
  58       use Ada.Strings.Unbounded;
  59       use Interfaces.C;
  60       use Terminal_Interface.Curses.Aux;
  61
  62       function Wgetnstr (Win : Window;
  63                          Str : char_array;
  64                          Len : int) return int;
  65       pragma Import (C, Wgetnstr, "wgetnstr");
  66
  67       --  FIXME: how to construct "(Len > 0) ? Len : 80"?
  68       Ask : constant Interfaces.C.size_t := Interfaces.C.size_t'Val (Len + 80);
  69       Txt : char_array (0 .. Ask);
  70
  71    begin
  72       Txt (0) := Interfaces.C.char'First;
  73       if Wgetnstr (Win, Txt, Txt'Length) = Curses_Err then
  74          raise Curses_Exception;
  75       end if;
  76       Str := To_Unbounded_String (To_Ada (Txt, True));
  77    end myGet;
  78
  79    use Int_IO;
  80
  81    use Ada.Strings.Unbounded;
  82
  83    c : Key_Code;
  84    buf : Unbounded_String;
  85    c2 : Character;
  86    fmt : Label_Justification := Centered;
  87    tmp : Integer;
  88
  89 begin
  90    c := CTRL ('l');
  91    loop
  92       Move_Cursor (Line => 0, Column => 0);
  93       c2 := Code_To_Char (c);
  94       case c2 is
  95          when Character'Val (Character'Pos ('l') mod 16#20#) => --  CTRL('l')
  96             Erase;
  97             Switch_Character_Attribute (Attr => (Bold_Character => True,
  98                                                  others => False));
  99             Add (Line => 0, Column => 20,
 100                  Str => "Soft Key Exerciser");
 101             Switch_Character_Attribute (On => False,
 102                                         Attr => (Bold_Character => True,
 103                                                  others => False));
 104
 105             Move_Cursor (Line => 2, Column => 0);
 106             P ("Available commands are:");
 107             P ("");
 108             P ("^L         -- refresh screen");
 109             P ("a          -- activate or restore soft keys");
 110             P ("d          -- disable soft keys");
 111             P ("c          -- set centered format for labels");
 112             P ("l          -- set left-justified format for labels");
 113             P ("r          -- set right-justified format for labels");
 114             P ("[12345678] -- set label; labels are numbered 1 through 8");
 115             P ("e          -- erase stdscr (should not erase labels)");
 116             P ("s          -- test scrolling of shortened screen");
 117             P ("x, q       -- return to main menu");
 118             P ("");
 119             P ("Note: if activating the soft keys causes your terminal to");
 120             P ("scroll up one line, your terminal auto-scrolls when anything");
 121             P ("is written to the last screen position.  The ncurses code");
 122             P ("does not yet handle this gracefully.");
 123             Refresh;
 124             Restore_Soft_Label_Keys;
 125
 126          when 'a' =>
 127             Restore_Soft_Label_Keys;
 128          when 'e' =>
 129             Clear;
 130          when 's' =>
 131             Add (Line => 20, Column => 0,
 132                 Str => "Press Q to stop the scrolling-test: ");
 133             loop
 134                c := Getchar;
 135                c2 := Code_To_Char (c);
 136                exit when c2 = 'Q';
 137                --  c = ERR?
 138                --  TODO when c is not a character (arrow key)
 139                --  the behavior is different from the C version.
 140                Add (Ch => c2);
 141             end loop;
 142          when 'd' =>
 143             Clear_Soft_Label_Keys;
 144          when 'l' =>
 145             fmt := Left;
 146          when 'c' =>
 147             fmt := Centered;
 148          when 'r' =>
 149             fmt := Right;
 150          when '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8'  =>
 151             Add (Line => 20, Column => 0,
 152                  Str => "Please enter the label value: ");
 153             Set_Echo_Mode (SwitchOn => True);
 154             myGet (Str => buf);
 155             Set_Echo_Mode (SwitchOn => False);
 156             tmp := ctoi (c2);
 157             Set_Soft_Label_Key (Label_Number (tmp), To_String (buf), fmt);
 158             Refresh_Soft_Label_Keys;
 159             Move_Cursor (Line => 20, Column => 0);
 160             Clear_To_End_Of_Line;
 161          when 'x' | 'q' =>
 162             exit;
 163             --  the C version needed a goto, ha ha
 164             --  breaks exit the case not the loop because fall-through
 165             --  happens in C!
 166          when others =>
 167             Beep;
 168       end case;
 169       c := Getchar;
 170       --  TODO exit when c = EOF
 171    end loop;
 172    Erase;
 173    End_Windows;
 174 end ncurses2.slk_test;