Ada95/samples/rain.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                                   Rain                                   --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 1998-2007,2008 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:  Laurent Pautet <pautet@gnat.com>
  37 --  Modified by:  Juergen Pfeifer, 1997
  38 --  Version Control
  39 --  $Revision: 1.8 $
  40 --  $Date: 2008/08/30 21:38:07 $
  41 --  Binding Version 01.00
  42 ------------------------------------------------------------------------------
  43 --                                                                          --
  44 with ncurses2.util; use ncurses2.util;
  45 with Ada.Numerics.Float_Random; use Ada.Numerics.Float_Random;
  46 with Status; use Status;
  47 with Terminal_Interface.Curses; use Terminal_Interface.Curses;
  48
  49 procedure Rain is
  50
  51    Visibility : Cursor_Visibility;
  52
  53    subtype X_Position is Line_Position;
  54    subtype Y_Position is Column_Position;
  55
  56    Xpos    : array (1 .. 5) of X_Position;
  57    Ypos    : array (1 .. 5) of Y_Position;
  58
  59    done : Boolean;
  60
  61    c : Key_Code;
  62
  63    N : Integer;
  64
  65    G : Generator;
  66
  67    Max_X, X : X_Position;
  68    Max_Y, Y : Y_Position;
  69
  70    procedure Next (J : in out Integer);
  71    procedure Cursor (X : X_Position; Y : Y_Position);
  72
  73    procedure Next (J : in out Integer) is
  74    begin
  75       if J = 5 then
  76          J := 1;
  77       else
  78          J := J + 1;
  79       end if;
  80    end Next;
  81
  82    procedure Cursor (X : X_Position; Y : Y_Position) is
  83    begin
  84       Move_Cursor (Line => X, Column => Y);
  85    end Cursor;
  86    pragma Inline (Cursor);
  87
  88 begin
  89
  90    Init_Screen;
  91    Set_NL_Mode;
  92    Set_Echo_Mode (False);
  93
  94    Visibility := Invisible;
  95    Set_Cursor_Visibility (Visibility);
  96    Set_Timeout_Mode (Standard_Window, Non_Blocking, 0);
  97
  98    Max_X := Lines - 5;
  99    Max_Y := Columns - 5;
 100
 101    for I in Xpos'Range loop
 102       Xpos (I) := X_Position (Float (Max_X) * Random (G)) + 2;
 103       Ypos (I) := Y_Position (Float (Max_Y) * Random (G)) + 2;
 104    end loop;
 105
 106    N := 1;
 107    done := False;
 108    while not done and Process.Continue loop
 109
 110       X := X_Position (Float (Max_X) * Random (G)) + 2;
 111       Y := Y_Position (Float (Max_Y) * Random (G)) + 2;
 112
 113       Cursor (X, Y);
 114       Add (Ch => '.');
 115
 116       Cursor (Xpos (N), Ypos (N));
 117       Add (Ch => 'o');
 118
 119       --
 120       Next (N);
 121       Cursor (Xpos (N), Ypos (N));
 122       Add (Ch => 'O');
 123
 124       --
 125       Next (N);
 126       Cursor (Xpos (N) - 1, Ypos (N));
 127       Add (Ch => '-');
 128       Cursor (Xpos (N), Ypos (N) - 1);
 129       Add (Str => "|.|");
 130       Cursor (Xpos (N) + 1, Ypos (N));
 131       Add (Ch => '-');
 132
 133       --
 134       Next (N);
 135       Cursor (Xpos (N) - 2, Ypos (N));
 136       Add (Ch => '-');
 137       Cursor (Xpos (N) - 1, Ypos (N) - 1);
 138       Add (Str => "/\\");
 139       Cursor (Xpos (N), Ypos (N) - 2);
 140       Add (Str => "| O |");
 141       Cursor (Xpos (N) + 1, Ypos (N) - 1);
 142       Add (Str => "\\/");
 143       Cursor (Xpos (N) + 2, Ypos (N));
 144       Add (Ch => '-');
 145
 146       --
 147       Next (N);
 148       Cursor (Xpos (N) - 2, Ypos (N));
 149       Add (Ch => ' ');
 150       Cursor (Xpos (N) - 1, Ypos (N) - 1);
 151       Add (Str => "   ");
 152       Cursor (Xpos (N), Ypos (N) - 2);
 153       Add (Str => "     ");
 154       Cursor (Xpos (N) + 1, Ypos (N) - 1);
 155       Add (Str => "   ");
 156       Cursor (Xpos (N) + 2, Ypos (N));
 157       Add (Ch => ' ');
 158
 159       Xpos (N) := X;
 160       Ypos (N) := Y;
 161
 162       c := Getchar;
 163       case c is
 164       when Character'Pos ('q') => done := True;
 165       when Character'Pos ('Q') => done := True;
 166       when Character'Pos ('s') => Set_NoDelay_Mode (Standard_Window, False);
 167       when Character'Pos (' ') => Set_NoDelay_Mode (Standard_Window, True);
 168       when others => null;
 169       end case;
 170
 171       Nap_Milli_Seconds (50);
 172    end loop;
 173
 174    Visibility := Normal;
 175    Set_Cursor_Visibility (Visibility);
 176    End_Windows;
 177    Curses_Free_All;
 178
 179 end Rain;