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

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                                 ncurses                                  --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 2000-2006,2009 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: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
  37 --  Version Control
  38 --  $Revision: 1.6 $
  39 --  $Date: 2009/12/26 17:38:58 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with ncurses2.util; use ncurses2.util;
  43 with ncurses2.genericPuts;
  44 with Terminal_Interface.Curses; use Terminal_Interface.Curses;
  45
  46 procedure ncurses2.color_edit is
  47    use Int_IO;
  48
  49    type RGB_Enum is (Redx, Greenx, Bluex);
  50
  51    procedure change_color (current : Color_Number;
  52                            field   : RGB_Enum;
  53                            value   : RGB_Value;
  54                            usebase : Boolean);
  55
  56    procedure change_color (current : Color_Number;
  57                            field   : RGB_Enum;
  58                            value   : RGB_Value;
  59                            usebase : Boolean)  is
  60       red, green, blue : RGB_Value;
  61    begin
  62       if usebase then
  63          Color_Content (current, red, green, blue);
  64       else
  65          red := 0;
  66          green := 0;
  67          blue := 0;
  68       end if;
  69
  70       case field is
  71          when Redx => red :=  red + value;
  72          when Greenx => green := green + value;
  73          when Bluex => blue := blue + value;
  74       end case;
  75
  76       declare
  77       begin
  78          Init_Color (current, red, green, blue);
  79       exception
  80          when Curses_Exception => Beep;
  81       end;
  82
  83    end change_color;
  84
  85    package x is new ncurses2.genericPuts (100); use x;
  86
  87    tmpb : x.BS.Bounded_String;
  88
  89    tmp4 : String (1 .. 4);
  90    tmp6 : String (1 .. 6);
  91    tmp8 : String (1 .. 8);
  92    --  This would be easier if Ada had a Bounded_String
  93    --  defined as a class instead of the inferior generic package,
  94    --  then I could define Put, Add, and Get for them. Blech.
  95    value : RGB_Value := 0;
  96    red, green, blue : RGB_Value;
  97    max_colors : constant Natural := Number_Of_Colors;
  98    current : Color_Number := 0;
  99    field : RGB_Enum := Redx;
 100    this_c : Key_Code := 0;
 101 begin
 102    Refresh;
 103
 104    for i in Color_Number'(0) .. Color_Number (Number_Of_Colors) loop
 105       Init_Pair (Color_Pair (i), White, i);
 106    end loop;
 107
 108    Move_Cursor (Line => Lines - 2, Column => 0);
 109    Add (Str => "Number: ");
 110    myPut (tmpb, Integer (value));
 111    myAdd (Str => tmpb);
 112
 113    loop
 114
 115       Switch_Character_Attribute (On => False,
 116                                   Attr => (Bold_Character => True,
 117                                            others => False));
 118       Add (Line => 0, Column => 20, Str => "Color RGB Value Editing");
 119
 120       Switch_Character_Attribute (On => False,
 121                                   Attr => (Bold_Character => True,
 122                                            others => False));
 123
 124       for i in Color_Number'(0) .. Color_Number (Number_Of_Colors) loop
 125          Move_Cursor (Line => 2 + Line_Position (i), Column => 0);
 126          if current = i then
 127             Add (Ch => '>');
 128          else
 129             Add (Ch => ' ');
 130          end if;
 131          --  TODO if i <= color_names'Max  then
 132          Put (tmp8, Integer (i));
 133          Set_Character_Attributes (Color => Color_Pair (i));
 134          Add (Str => "        ");
 135          Set_Character_Attributes;
 136
 137          Refresh;
 138
 139          Color_Content (i, red, green, blue);
 140          Add (Str => "   R = ");
 141          if current = i and field = Redx then
 142             Switch_Character_Attribute (On => True,
 143                                         Attr => (Stand_Out => True,
 144                                                  others => False));
 145          end if;
 146          Put (tmp4, Integer (red));
 147          Add (Str => tmp4);
 148          if current = i and field = Redx then
 149             Set_Character_Attributes;
 150          end if;
 151          Add (Str => "   G = ");
 152          if current = i and field =  Greenx then
 153             Switch_Character_Attribute (On => True,
 154                                         Attr => (Stand_Out => True,
 155                                                  others => False));
 156          end if;
 157          Put (tmp4, Integer (green));
 158          Add (Str => tmp4);
 159          if current = i and field = Greenx then
 160             Set_Character_Attributes;
 161          end if;
 162          Add (Str => "   B = ");
 163          if current = i and field = Bluex then
 164             Switch_Character_Attribute (On => True,
 165                                         Attr => (Stand_Out => True,
 166                                                  others => False));
 167          end if;
 168          Put (tmp4, Integer (blue));
 169          Add (Str => tmp4);
 170          if current = i and field = Bluex then
 171             Set_Character_Attributes;
 172          end if;
 173          Set_Character_Attributes;
 174          Add (Ch => ')');
 175       end loop;
 176       Add (Line => Line_Position (Number_Of_Colors + 3), Column => 0,
 177            Str => "Use up/down to select a color, left/right to change " &
 178            "fields.");
 179       Add (Line => Line_Position (Number_Of_Colors + 4), Column => 0,
 180            Str => "Modify field by typing nnn=, nnn-, or nnn+.  ? for help.");
 181
 182       Move_Cursor (Line => 2 + Line_Position (current), Column => 0);
 183
 184       this_c := Getchar;
 185       if Is_Digit (this_c) then
 186          value := 0;
 187       end if;
 188
 189       case this_c is
 190          when KEY_UP =>
 191             current := (current - 1) mod Color_Number (max_colors);
 192          when KEY_DOWN =>
 193             current := (current + 1) mod Color_Number (max_colors);
 194          when KEY_RIGHT =>
 195             field := RGB_Enum'Val ((RGB_Enum'Pos (field) + 1) mod 3);
 196          when KEY_LEFT =>
 197             field := RGB_Enum'Val ((RGB_Enum'Pos (field) - 1) mod 3);
 198          when
 199            Character'Pos ('0') |
 200            Character'Pos ('1') |
 201            Character'Pos ('2') |
 202            Character'Pos ('3') |
 203            Character'Pos ('4') |
 204            Character'Pos ('5') |
 205            Character'Pos ('6') |
 206            Character'Pos ('7') |
 207            Character'Pos ('8') |
 208            Character'Pos ('9')  =>
 209             value := value * 10 + RGB_Value (ctoi (Code_To_Char (this_c)));
 210
 211          when Character'Pos ('+') =>
 212             change_color (current, field,  value, True);
 213
 214          when Character'Pos ('-') =>
 215             change_color (current, field, -value, True);
 216
 217          when Character'Pos ('=') =>
 218             change_color (current, field,  value, False);
 219
 220          when Character'Pos ('?') =>
 221             Erase;
 222             P ("                      RGB Value Editing Help");
 223             P ("");
 224             P ("You are in the RGB value editor.  Use the arrow keys to " &
 225                "select one of");
 226             P ("the fields in one of the RGB triples of the current colors;" &
 227                " the one");
 228             P ("currently selected will be reverse-video highlighted.");
 229             P ("");
 230             P ("To change a field, enter the digits of the new value; they" &
 231                " are echoed");
 232             P ("as entered.  Finish by typing `='.  The change will take" &
 233                " effect instantly.");
 234             P ("To increment or decrement a value, use the same procedure," &
 235                " but finish");
 236             P ("with a `+' or `-'.");
 237             P ("");
 238             P ("To quit, do `x' or 'q'");
 239
 240             Pause;
 241             Erase;
 242          when Character'Pos ('q') |
 243            Character'Pos ('x') =>
 244             null;
 245          when others =>
 246             Beep;
 247       end case;
 248       Move_Cursor (Line => Lines - 2, Column => 0);
 249       Put (tmp6, Integer (value));
 250       Add (Str => "Number: " & tmp6);
 251
 252       Clear_To_End_Of_Line;
 253       exit when this_c = Character'Pos ('x') or
 254         this_c = Character'Pos ('q');
 255    end loop;
 256
 257    Erase;
 258    End_Windows;
 259 end ncurses2.color_edit;