release/src/router/libncurses/Ada95/samples/sample-menu_demo-aux.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                            Sample.Menu_Demo.Aux                          --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 1998-2006,2009 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,   --
  27 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    --
  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:  Juergen Pfeifer, 1996
  37 --  Version Control
  38 --  $Revision: 1.14 $
  39 --  $Date: 2009/12/26 17:38:58 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
  43
  44 with Sample.Manifest; use Sample.Manifest;
  45 with Sample.Helpers; use Sample.Helpers;
  46 with Sample.Keyboard_Handler; use Sample.Keyboard_Handler;
  47 with Sample.Explanation; use Sample.Explanation;
  48
  49 package body Sample.Menu_Demo.Aux is
  50
  51    procedure Geometry (M  : Menu;
  52                        L  : out Line_Count;
  53                        C  : out Column_Count;
  54                        Y  : out Line_Position;
  55                        X  : out Column_Position;
  56                        Fy : out Line_Position;
  57                        Fx : out Column_Position);
  58
  59    procedure Geometry (M  : Menu;
  60                        L  : out Line_Count;        -- Lines used for menu
  61                        C  : out Column_Count;      -- Columns used for menu
  62                        Y  : out Line_Position;     -- Proposed Line for menu
  63                        X  : out Column_Position;   -- Proposed Column for menu
  64                        Fy : out Line_Position;     -- Vertical inner frame
  65                        Fx : out Column_Position)   -- Horiz. inner frame
  66    is
  67       Spc_Desc : Column_Position; -- spaces between description and item
  68    begin
  69       Set_Mark (M, Menu_Marker);
  70
  71       Spacing (M, Spc_Desc, Fy, Fx);
  72       Scale (M, L, C);
  73
  74       Fx := Fx + Column_Position (Fy - 1); -- looks a bit nicer
  75
  76       L := L + 2 * Fy;  -- count for frame at top and bottom
  77       C := C + 2 * Fx;  -- "
  78
  79       --  Calculate horizontal coordinate at the screen center
  80       X := (Columns - C) / 2;
  81       Y := 1;  -- always startin line 1
  82
  83    end Geometry;
  84
  85    procedure Geometry (M : Menu;
  86                        L : out Line_Count;        -- Lines used for menu
  87                        C : out Column_Count;      -- Columns used for menu
  88                        Y : out Line_Position;     -- Proposed Line for menu
  89                        X : out Column_Position)   -- Proposed Column for menu
  90    is
  91       Fy : Line_Position;
  92       Fx : Column_Position;
  93    begin
  94       Geometry (M, L, C, Y, X, Fy, Fx);
  95    end Geometry;
  96
  97    function Create (M     : Menu;
  98                     Title : String;
  99                     Lin   : Line_Position;
 100                     Col   : Column_Position) return Panel
 101    is
 102       W, S : Window;
 103       L : Line_Count;
 104       C : Column_Count;
 105       Y, Fy : Line_Position;
 106       X, Fx : Column_Position;
 107       Pan : Panel;
 108    begin
 109       Geometry (M, L, C, Y, X, Fy, Fx);
 110       W := New_Window (L, C, Lin, Col);
 111       Set_Meta_Mode (W);
 112       Set_KeyPad_Mode (W);
 113       if Has_Colors then
 114          Set_Background (Win => W,
 115                          Ch  => (Ch    => ' ',
 116                                  Color => Menu_Back_Color,
 117                                  Attr  => Normal_Video));
 118          Set_Foreground (Men => M, Color => Menu_Fore_Color);
 119          Set_Background (Men => M, Color => Menu_Back_Color);
 120          Set_Grey (Men => M, Color => Menu_Grey_Color);
 121          Erase (W);
 122       end if;
 123       S := Derived_Window (W, L - Fy, C - Fx, Fy, Fx);
 124       Set_Meta_Mode (S);
 125       Set_KeyPad_Mode (S);
 126       Box (W);
 127       Set_Window (M, W);
 128       Set_Sub_Window (M, S);
 129       if Title'Length > 0 then
 130          Window_Title (W, Title);
 131       end if;
 132       Pan := New_Panel (W);
 133       Post (M);
 134       return Pan;
 135    end Create;
 136
 137    procedure Destroy (M : Menu;
 138                       P : in out Panel)
 139    is
 140       W, S : Window;
 141    begin
 142       W := Get_Window (M);
 143       S := Get_Sub_Window (M);
 144       Post (M, False);
 145       Erase (W);
 146       Delete (P);
 147       Set_Window (M, Null_Window);
 148       Set_Sub_Window (M, Null_Window);
 149       Delete (S);
 150       Delete (W);
 151       Update_Panels;
 152    end Destroy;
 153
 154    function Get_Request (M : Menu; P : Panel) return Key_Code
 155    is
 156       W  : constant Window := Get_Window (M);
 157       K  : Real_Key_Code;
 158       Ch : Character;
 159    begin
 160       Top (P);
 161       loop
 162          K := Get_Key (W);
 163          if K in Special_Key_Code'Range then
 164             case K is
 165                when HELP_CODE           => Explain_Context;
 166                when EXPLAIN_CODE        => Explain ("MENUKEYS");
 167                when Key_Home            => return REQ_FIRST_ITEM;
 168                when QUIT_CODE           => return QUIT;
 169                when Key_Cursor_Down     => return REQ_DOWN_ITEM;
 170                when Key_Cursor_Up       => return REQ_UP_ITEM;
 171                when Key_Cursor_Left     => return REQ_LEFT_ITEM;
 172                when Key_Cursor_Right    => return REQ_RIGHT_ITEM;
 173                when Key_End             => return REQ_LAST_ITEM;
 174                when Key_Backspace       => return REQ_BACK_PATTERN;
 175                when Key_Next_Page       => return REQ_SCR_DPAGE;
 176                when Key_Previous_Page   => return REQ_SCR_UPAGE;
 177                when others              => return K;
 178             end case;
 179          elsif K in Normal_Key_Code'Range then
 180             Ch := Character'Val (K);
 181             case Ch is
 182                when CAN => return QUIT;                  --  CTRL-X
 183                when SO  => return REQ_NEXT_ITEM;         --  CTRL-N
 184                when DLE => return REQ_PREV_ITEM;         --  CTRL-P
 185                when NAK => return REQ_SCR_ULINE;         --  CTRL-U
 186                when EOT => return REQ_SCR_DLINE;         --  CTRL-D
 187                when ACK => return REQ_SCR_DPAGE;         --  CTRL-F
 188                when STX => return REQ_SCR_UPAGE;         --  CTRL-B
 189                when EM  => return REQ_CLEAR_PATTERN;     --  CTRL-Y
 190                when BS  => return REQ_BACK_PATTERN;      --  CTRL-H
 191                when SOH => return REQ_NEXT_MATCH;        --  CTRL-A
 192                when ENQ => return REQ_PREV_MATCH;        --  CTRL-E
 193                when DC4 => return REQ_TOGGLE_ITEM;       --  CTRL-T
 194
 195                when CR | LF  => return SELECT_ITEM;
 196                when others   => return K;
 197             end case;
 198          else
 199             return K;
 200          end if;
 201       end loop;
 202    end Get_Request;
 203
 204 end Sample.Menu_Demo.Aux;