------------------------------------------------------------------------------ -- -- -- GNAT ncurses Binding Samples -- -- -- -- ncurses -- -- -- -- B O D Y -- -- -- ------------------------------------------------------------------------------ -- Copyright 2018,2020 Thomas E. Dickey -- -- Copyright 2000-2009,2011 Free Software Foundation, Inc. -- -- -- -- Permission is hereby granted, free of charge, to any person obtaining a -- -- copy of this software and associated documentation files (the -- -- "Software"), to deal in the Software without restriction, including -- -- without limitation the rights to use, copy, modify, merge, publish, -- -- distribute, distribute with modifications, sublicense, and/or sell -- -- copies of the Software, and to permit persons to whom the Software is -- -- furnished to do so, subject to the following conditions: -- -- -- -- The above copyright notice and this permission notice shall be included -- -- in all copies or substantial portions of the Software. -- -- -- -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -- -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -- -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -- -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -- -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -- -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR -- -- THE USE OR OTHER DEALINGS IN THE SOFTWARE. -- -- -- -- Except as contained in this notice, the name(s) of the above copyright -- -- holders shall not be used in advertising or otherwise to promote the -- -- sale, use or other dealings in this Software without prior written -- -- authorization. -- ------------------------------------------------------------------------------ -- Author: Eugene V. Melaragno 2000 -- Version Control -- $Revision: 1.11 $ -- $Date: 2020/02/02 23:34:34 $ -- Binding Version 01.00 ------------------------------------------------------------------------------ with ncurses2.util; use ncurses2.util; with Terminal_Interface.Curses; use Terminal_Interface.Curses; with Ada.Strings.Unbounded; with Interfaces.C; with Terminal_Interface.Curses.Aux; procedure ncurses2.slk_test is procedure myGet (Win : Window := Standard_Window; Str : out Ada.Strings.Unbounded.Unbounded_String; Len : Integer := -1); procedure myGet (Win : Window := Standard_Window; Str : out Ada.Strings.Unbounded.Unbounded_String; Len : Integer := -1) is use Ada.Strings.Unbounded; use Interfaces.C; use Terminal_Interface.Curses.Aux; function Wgetnstr (Win : Window; Str : char_array; Len : int) return int; pragma Import (C, Wgetnstr, "wgetnstr"); -- FIXME: how to construct "(Len > 0) ? Len : 80"? Ask : constant Interfaces.C.size_t := Interfaces.C.size_t'Val (Len + 80); Txt : char_array (0 .. Ask); begin Txt (0) := Interfaces.C.char'First; if Wgetnstr (Win, Txt, Txt'Length) = Curses_Err then raise Curses_Exception; end if; Str := To_Unbounded_String (To_Ada (Txt, True)); end myGet; use Ada.Strings.Unbounded; c : Key_Code; buf : Unbounded_String; c2 : Character; fmt : Label_Justification := Centered; tmp : Integer; begin c := CTRL ('l'); loop Move_Cursor (Line => 0, Column => 0); c2 := Code_To_Char (c); case c2 is when Character'Val (Character'Pos ('l') mod 16#20#) => -- CTRL('l') Erase; Switch_Character_Attribute (Attr => (Bold_Character => True, others => False)); Add (Line => 0, Column => 20, Str => "Soft Key Exerciser"); Switch_Character_Attribute (On => False, Attr => (Bold_Character => True, others => False)); Move_Cursor (Line => 2, Column => 0); P ("Available commands are:"); P (""); P ("^L -- refresh screen"); P ("a -- activate or restore soft keys"); P ("d -- disable soft keys"); P ("c -- set centered format for labels"); P ("l -- set left-justified format for labels"); P ("r -- set right-justified format for labels"); P ("[12345678] -- set label; labels are numbered 1 through 8"); P ("e -- erase stdscr (should not erase labels)"); P ("s -- test scrolling of shortened screen"); P ("x, q -- return to main menu"); P (""); P ("Note: if activating the soft keys causes your terminal to"); P ("scroll up one line, your terminal auto-scrolls when anything"); P ("is written to the last screen position. The ncurses code"); P ("does not yet handle this gracefully."); Refresh; Restore_Soft_Label_Keys; when 'a' => Restore_Soft_Label_Keys; when 'e' => Clear; when 's' => Add (Line => 20, Column => 0, Str => "Press Q to stop the scrolling-test: "); loop c := Getchar; c2 := Code_To_Char (c); exit when c2 = 'Q'; -- c = ERR? -- TODO when c is not a character (arrow key) -- the behavior is different from the C version. Add (Ch => c2); end loop; when 'd' => Clear_Soft_Label_Keys; when 'l' => fmt := Left; when 'c' => fmt := Centered; when 'r' => fmt := Right; when '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' => Add (Line => 20, Column => 0, Str => "Please enter the label value: "); Set_Echo_Mode (SwitchOn => True); myGet (Str => buf); Set_Echo_Mode (SwitchOn => False); tmp := ctoi (c2); Set_Soft_Label_Key (Label_Number (tmp), To_String (buf), fmt); Refresh_Soft_Label_Keys; Move_Cursor (Line => 20, Column => 0); Clear_To_End_Of_Line; when 'x' | 'q' => exit; -- the C version needed a goto, ha ha -- breaks exit the case not the loop because fall-through -- happens in C! when others => Beep; end case; c := Getchar; -- TODO exit when c = EOF end loop; Erase; End_Windows; end ncurses2.slk_test;