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

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                                 ncurses                                  --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 2000-2014,2015 Free Software Foundation, Inc.              --
  11 --                                                                          --
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  20 -- The above copyright notice and this permission notice shall be included  --
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  31 -- Except as contained in this notice, the name(s) of the above copyright   --
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  35 ------------------------------------------------------------------------------
  36 --  Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
  37 --  Version Control
  38 --  $Revision: 1.7 $
  39 --  $Date: 2015/07/25 23:43:19 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with ncurses2.util; use ncurses2.util;
  43 with Terminal_Interface.Curses; use Terminal_Interface.Curses;
  44
  45 --  test effects of overlapping windows
  46
  47 procedure ncurses2.overlap_test is
  48
  49    procedure fillwin (win : Window; ch : Character);
  50    procedure crosswin (win : Window; ch : Character);
  51
  52    procedure fillwin (win : Window; ch : Character) is
  53       y1 : Line_Position;
  54       x1 : Column_Position;
  55    begin
  56       Get_Size (win, y1, x1);
  57       for y in 0 .. y1 - 1 loop
  58          Move_Cursor (win, y, 0);
  59          for x in 0 .. x1 - 1 loop
  60             Add (win, Ch => ch);
  61          end loop;
  62       end loop;
  63    exception
  64       when Curses_Exception => null;
  65          --  write to lower right corner
  66    end fillwin;
  67
  68    procedure crosswin (win : Window; ch : Character) is
  69       y1 : Line_Position;
  70       x1 : Column_Position;
  71    begin
  72       Get_Size (win, y1, x1);
  73       for y in 0 .. y1 - 1 loop
  74          for x in 0 .. x1 - 1 loop
  75             if ((x > (x1 - 1) / 3) and (x <= (2 * (x1 - 1)) / 3)) or
  76                (((y > (y1 - 1) / 3) and (y <= (2 * (y1 - 1)) / 3)))
  77             then
  78                Move_Cursor (win, y, x);
  79                Add (win, Ch => ch);
  80             end if;
  81          end loop;
  82       end loop;
  83    end crosswin;
  84
  85    --  In a 24x80 screen like some xterms are, the instructions will
  86    --  be overwritten.
  87    ch : Character;
  88    win1 : Window := New_Window (9, 20, 3, 3);
  89    win2 : Window := New_Window (9, 20, 9, 16);
  90 begin
  91    Set_Raw_Mode (SwitchOn => True);
  92    Refresh;
  93    Move_Cursor (Line => 0, Column => 0);
  94    Add (Str => "This test shows the behavior of wnoutrefresh() with " &
  95         "respect to");
  96    Add (Ch => newl);
  97    Add (Str => "the shared region of two overlapping windows A and B. " &
  98         "The cross");
  99    Add (Ch => newl);
 100    Add (Str => "pattern in each window does not overlap the other.");
 101    Add (Ch => newl);
 102
 103    Move_Cursor (Line => 18, Column => 0);
 104    Add (Str => "a = refresh A, then B, then doupdate. b = refresh B, " &
 105         "then A, then doupdate");
 106    Add (Ch => newl);
 107    Add (Str => "c = fill window A with letter A.      d = fill window B " &
 108         "with letter B.");
 109    Add (Ch => newl);
 110    Add (Str => "e = cross pattern in window A.        f = cross pattern " &
 111         "in window B.");
 112    Add (Ch => newl);
 113    Add (Str => "g = clear window A.                   h = clear window B.");
 114    Add (Ch => newl);
 115    Add (Str => "i = overwrite A onto B.               j = overwrite " &
 116         "B onto A.");
 117    Add (Ch => newl);
 118    Add (Str => "^Q/ESC = terminate test.");
 119
 120    loop
 121       ch := Code_To_Char (Getchar);
 122       exit when ch = CTRL ('Q') or ch = CTRL ('['); --  QUIT or ESCAPE
 123       case ch is
 124          when 'a' => --  refresh window A first, then B
 125             Refresh_Without_Update (win1);
 126             Refresh_Without_Update (win2);
 127             Update_Screen;
 128          when 'b' => --  refresh window B first, then A
 129             Refresh_Without_Update (win2);
 130             Refresh_Without_Update (win1);
 131             Update_Screen;
 132          when 'c' => --  fill window A so it's visible
 133             fillwin (win1, 'A');
 134          when 'd' => --  fill window B so it's visible
 135             fillwin (win2, 'B');
 136          when 'e' => --  cross test pattern in window A
 137             crosswin (win1, 'A');
 138          when 'f' => --  cross test pattern in window B
 139             crosswin (win2, 'B');
 140          when 'g' => --  clear window A
 141             Clear (win1);
 142             Move_Cursor (win1, 0, 0);
 143          when 'h' => --  clear window B
 144             Clear (win2);
 145             Move_Cursor (win2, 0, 0);
 146          when 'i' => --  overwrite A onto B
 147             Overwrite (win1, win2);
 148          when 'j' => --  overwrite B onto A
 149             Overwrite (win2, win1);
 150          when others => null;
 151       end case;
 152    end loop;
 153
 154    Delete (win2);
 155    Delete (win1);
 156    Erase;
 157    End_Windows;
 158 end ncurses2.overlap_test;