1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding Samples --
9 ------------------------------------------------------------------------------
10 -- Copyright (c) 2000-2008,2009 Free Software Foundation, Inc. --
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35 ------------------------------------------------------------------------------
36 -- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
39 -- $Date: 2009/12/26 17:38:58 $
40 -- Binding Version 01.00
41 ------------------------------------------------------------------------------
42 -- Windows and scrolling tester.
43 -- Demonstrate windows
45 with Ada.Strings.Fixed;
48 with ncurses2.util; use ncurses2.util;
49 with ncurses2.genericPuts;
50 with Terminal_Interface.Curses; use Terminal_Interface.Curses;
51 with Terminal_Interface.Curses.Mouse; use Terminal_Interface.Curses.Mouse;
52 with Terminal_Interface.Curses.PutWin; use Terminal_Interface.Curses.PutWin;
54 with Ada.Streams.Stream_IO; use Ada.Streams.Stream_IO;
55 with Ada.Streams; use Ada.Streams;
57 procedure ncurses2.acs_and_scroll is
59 Macro_Quit : constant Key_Code := Character'Pos ('Q') mod 16#20#;
60 Macro_Escape : constant Key_Code := Character'Pos ('[') mod 16#20#;
62 Quit : constant Key_Code := CTRL ('Q');
63 Escape : constant Key_Code := CTRL ('[');
65 Botlines : constant Line_Position := 4;
73 type FrameA is access Frame;
76 dumpfile : constant String := "screendump";
78 procedure Outerbox (ul, lr : pair; onoff : Boolean);
79 function HaveKeyPad (w : Window) return Boolean;
80 function HaveScroll (w : Window) return Boolean;
81 procedure newwin_legend (curpw : Window);
82 procedure transient (curpw : Window; msg : String);
83 procedure newwin_report (win : Window := Standard_Window);
84 procedure selectcell (uli : Line_Position;
85 ulj : Column_Position;
87 lrj : Column_Position;
90 function getwindow return Window;
91 procedure newwin_move (win : Window;
93 dx : Column_Position);
94 function delete_framed (fp : FrameA; showit : Boolean) return FrameA;
97 -- I wish there was a standard library linked list. Oh well.
109 procedure Outerbox (ul, lr : pair; onoff : Boolean) is
112 -- Note the fix of an obscure bug
113 -- try making a 1x1 box then enlarging it, the is a blank
114 -- upper left corner!
115 Add (Line => ul.y - 1, Column => ul.x - 1,
116 Ch => ACS_Map (ACS_Upper_Left_Corner));
117 Add (Line => ul.y - 1, Column => lr.x + 1,
118 Ch => ACS_Map (ACS_Upper_Right_Corner));
119 Add (Line => lr.y + 1, Column => lr.x + 1,
120 Ch => ACS_Map (ACS_Lower_Right_Corner));
121 Add (Line => lr.y + 1, Column => ul.x - 1,
122 Ch => ACS_Map (ACS_Lower_Left_Corner));
124 Move_Cursor (Line => ul.y - 1, Column => ul.x);
125 Horizontal_Line (Line_Symbol => ACS_Map (ACS_Horizontal_Line),
126 Line_Size => Integer (lr.x - ul.x) + 1);
127 Move_Cursor (Line => ul.y, Column => ul.x - 1);
128 Vertical_Line (Line_Symbol => ACS_Map (ACS_Vertical_Line),
129 Line_Size => Integer (lr.y - ul.y) + 1);
130 Move_Cursor (Line => lr.y + 1, Column => ul.x);
131 Horizontal_Line (Line_Symbol => ACS_Map (ACS_Horizontal_Line),
132 Line_Size => Integer (lr.x - ul.x) + 1);
133 Move_Cursor (Line => ul.y, Column => lr.x + 1);
134 Vertical_Line (Line_Symbol => ACS_Map (ACS_Vertical_Line),
135 Line_Size => Integer (lr.y - ul.y) + 1);
137 Add (Line => ul.y - 1, Column => ul.x - 1, Ch => ' ');
138 Add (Line => ul.y - 1, Column => lr.x + 1, Ch => ' ');
139 Add (Line => lr.y + 1, Column => lr.x + 1, Ch => ' ');
140 Add (Line => lr.y + 1, Column => ul.x - 1, Ch => ' ');
142 Move_Cursor (Line => ul.y - 1, Column => ul.x);
143 Horizontal_Line (Line_Symbol => Blank2,
144 Line_Size => Integer (lr.x - ul.x) + 1);
145 Move_Cursor (Line => ul.y, Column => ul.x - 1);
146 Vertical_Line (Line_Symbol => Blank2,
147 Line_Size => Integer (lr.y - ul.y) + 1);
148 Move_Cursor (Line => lr.y + 1, Column => ul.x);
149 Horizontal_Line (Line_Symbol => Blank2,
150 Line_Size => Integer (lr.x - ul.x) + 1);
151 Move_Cursor (Line => ul.y, Column => lr.x + 1);
152 Vertical_Line (Line_Symbol => Blank2,
153 Line_Size => Integer (lr.y - ul.y) + 1);
157 function HaveKeyPad (w : Window) return Boolean is
159 return Get_KeyPad_Mode (w);
161 when Curses_Exception => return False;
164 function HaveScroll (w : Window) return Boolean is
166 return Scrolling_Allowed (w);
168 when Curses_Exception => return False;
171 procedure newwin_legend (curpw : Window) is
173 package p is new genericPuts (200);
177 type string_a is access String;
181 code : Integer range 0 .. 3;
184 legend : constant array (Positive range <>) of rrr :=
187 new String'("^C = create window"), 0
190 new String'("^N = next window"), 0
193 new String'("^P = previous window"), 0
196 new String'("^F = scroll forward"), 0
199 new String'("^B = scroll backward"), 0
202 new String'("^K = keypad(%s)"), 1
205 new String'("^S = scrollok(%s)"), 2
208 new String'("^W = save window to file"), 0
211 new String'("^R = restore window"), 0
214 new String'("^X = resize"), 0
217 new String'("^Q%s = exit"), 3
221 buf : Bounded_String;
222 do_keypad : constant Boolean := HaveKeyPad (curpw);
223 do_scroll : constant Boolean := HaveScroll (curpw);
229 use Ada.Strings.Fixed;
232 Move_Cursor (Line => Lines - 4, Column => 0);
233 for n in legend'Range loop
234 pos := Ada.Strings.Fixed.Index (Source => legend (n).msg.all,
236 -- buf := (others => ' ');
237 buf := To_Bounded_String (legend (n).msg.all);
238 case legend (n).code is
242 Replace_Slice (buf, pos, pos + 1, "yes");
244 Replace_Slice (buf, pos, pos + 1, "no");
248 Replace_Slice (buf, pos, pos + 1, "yes");
250 Replace_Slice (buf, pos, pos + 1, "no");
254 Replace_Slice (buf, pos, pos + 1, "/ESC");
256 Replace_Slice (buf, pos, pos + 1, "");
259 Get_Cursor_Position (Line => mypair.y, Column => mypair.x);
260 if Columns < mypair.x + 3 + Column_Position (Length (buf)) then
262 elsif n /= 1 then -- n /= legen'First
267 Clear_To_End_Of_Line;
270 procedure transient (curpw : Window; msg : String) is
272 newwin_legend (curpw);
274 Add (Line => Lines - 1, Column => 0, Str => msg);
276 Nap_Milli_Seconds (1000);
279 Move_Cursor (Line => Lines - 1, Column => 0);
281 if HaveKeyPad (curpw) then
282 Add (Str => "Non-arrow");
284 Add (Str => "All other");
286 Add (Str => " characters are echoed, window should ");
287 if not HaveScroll (curpw) then
290 Add (Str => "scroll");
292 Clear_To_End_Of_Line;
295 procedure newwin_report (win : Window := Standard_Window) is
299 tmp2a : String (1 .. 2);
300 tmp2b : String (1 .. 2);
302 if win /= Standard_Window then
305 Get_Cursor_Position (win, y, x);
306 Move_Cursor (Line => Lines - 1, Column => Columns - 17);
307 Put (tmp2a, Integer (y));
308 Put (tmp2b, Integer (x));
309 Add (Str => "Y = " & tmp2a & " X = " & tmp2b);
310 if win /= Standard_Window then
313 Move_Cursor (win, y, x);
317 procedure selectcell (uli : Line_Position;
318 ulj : Column_Position;
320 lrj : Column_Position;
325 i : Line_Position := 0;
326 j : Column_Position := 0;
327 si : constant Line_Position := lri - uli + 1;
328 sj : constant Column_Position := lrj - ulj + 1;
333 Move_Cursor (Line => uli + i, Column => ulj + j);
341 -- on the same line macro calls interfere due to the # comment
342 -- this is needed because keypad off affects all windows.
343 -- try removing the ESCAPE and see what happens.
348 -- same as i := i - 1 because of Modulus arithetic,
349 -- on Line_Position, which is a Natural
350 -- the C version uses this form too, interestingly.
362 Button : Mouse_Button;
363 State : Button_State;
367 Get_Event (Event => event,
372 if y > uli and x > ulj then
375 -- same as when others =>
397 function getwindow return Window is
402 Move_Cursor (Line => 0, Column => 0);
403 Clear_To_End_Of_Line;
404 Add (Str => "Use arrows to move cursor, anything else to mark corner 1");
406 selectcell (2, 1, Lines - Botlines - 2, Columns - 2, ul, result);
410 Add (Line => ul.y - 1, Column => ul.x - 1,
411 Ch => ACS_Map (ACS_Upper_Left_Corner));
412 Move_Cursor (Line => 0, Column => 0);
413 Clear_To_End_Of_Line;
414 Add (Str => "Use arrows to move cursor, anything else to mark corner 2");
416 selectcell (ul.y, ul.x, Lines - Botlines - 2, Columns - 2, lr, result);
421 rwindow := Sub_Window (Number_Of_Lines => lr.y - ul.y + 1,
422 Number_Of_Columns => lr.x - ul.x + 1,
423 First_Line_Position => ul.y,
424 First_Column_Position => ul.x);
426 Outerbox (ul, lr, True);
431 Move_Cursor (Line => 0, Column => 0);
432 Clear_To_End_Of_Line;
436 procedure newwin_move (win : Window;
438 dx : Column_Position) is
439 cur_y, max_y : Line_Position;
440 cur_x, max_x : Column_Position;
442 Get_Cursor_Position (win, cur_y, cur_x);
443 Get_Size (win, max_y, max_x);
444 cur_x := Column_Position'Min (Column_Position'Max (cur_x + dx, 0),
446 cur_y := Line_Position'Min (Line_Position'Max (cur_y + dy, 0),
449 Move_Cursor (win, Line => cur_y, Column => cur_x);
452 function delete_framed (fp : FrameA; showit : Boolean) return FrameA is
455 fp.last.next := fp.next;
456 fp.next.last := fp.last;
473 Mask : Event_Mask := No_Events;
480 Register_Reportable_Event (
484 Mask2 := Start_Mouse (Mask);
487 Set_Raw_Mode (SwitchOn => True);
489 transient (Standard_Window, "");
491 when Character'Pos ('c') mod 16#20# => -- Ctrl('c')
493 neww : constant FrameA := new Frame'(null, null,
497 neww.wind := getwindow;
498 if neww.wind = Null_Window then
500 -- was goto breakout; ha ha ha
503 if current = null then
507 neww.next := current.next;
508 neww.last := current;
509 neww.last.next := neww;
510 neww.next.last := neww;
514 Set_KeyPad_Mode (current.wind, True);
515 current.do_keypad := HaveKeyPad (current.wind);
516 current.do_scroll := HaveScroll (current.wind);
519 when Character'Pos ('N') mod 16#20# => -- Ctrl('N')
520 if current /= null then
521 current := current.next;
523 when Character'Pos ('P') mod 16#20# => -- Ctrl('P')
524 if current /= null then
525 current := current.last;
527 when Character'Pos ('F') mod 16#20# => -- Ctrl('F')
528 if current /= null and then HaveScroll (current.wind) then
529 Scroll (current.wind, 1);
531 when Character'Pos ('B') mod 16#20# => -- Ctrl('B')
532 if current /= null and then HaveScroll (current.wind) then
533 -- The C version of Scroll may return ERR which is ignored
534 -- we need to avoid the exception
535 -- with the 'and HaveScroll(current.wind)'
536 Scroll (current.wind, -1);
538 when Character'Pos ('K') mod 16#20# => -- Ctrl('K')
539 if current /= null then
540 current.do_keypad := not current.do_keypad;
541 Set_KeyPad_Mode (current.wind, current.do_keypad);
543 when Character'Pos ('S') mod 16#20# => -- Ctrl('S')
544 if current /= null then
545 current.do_scroll := not current.do_scroll;
546 Allow_Scrolling (current.wind, current.do_scroll);
548 when Character'Pos ('W') mod 16#20# => -- Ctrl('W')
549 if current /= current.next then
550 Create (f, Name => dumpfile); -- TODO error checking
551 if not Is_Open (f) then
552 raise Curses_Exception;
554 Put_Window (current.wind, f);
556 current := delete_framed (current, True);
558 when Character'Pos ('R') mod 16#20# => -- Ctrl('R')
560 neww : FrameA := new Frame'(null, null, False, False,
563 Open (f, Mode => In_File, Name => dumpfile);
564 neww := new Frame'(null, null, False, False, Null_Window);
566 neww.next := current.next;
567 neww.last := current;
568 neww.last.next := neww;
569 neww.next.last := neww;
571 neww.wind := Get_Window (f);
576 when Character'Pos ('X') mod 16#20# => -- Ctrl('X')
577 if current /= null then
580 mx : Column_Position;
584 Move_Cursor (Line => 0, Column => 0);
585 Clear_To_End_Of_Line;
586 Add (Str => "Use arrows to move cursor, anything else " &
587 "to mark new corner");
590 Get_Window_Position (current.wind, ul.y, ul.x);
592 selectcell (ul.y, ul.x, Lines - Botlines - 2, Columns - 2,
595 -- the C version had a goto. I refuse gotos.
598 Get_Size (current.wind, lr.y, lr.x);
599 lr.y := lr.y + ul.y - 1;
600 lr.x := lr.x + ul.x - 1;
601 Outerbox (ul, lr, False);
602 Refresh_Without_Update;
604 Get_Size (current.wind, my, mx);
605 if my > tmp.y - ul.y then
606 Get_Cursor_Position (current.wind, lr.y, lr.x);
607 Move_Cursor (current.wind, tmp.y - ul.y + 1, 0);
608 Clear_To_End_Of_Screen (current.wind);
609 Move_Cursor (current.wind, lr.y, lr.x);
611 if mx > tmp.x - ul.x then
612 for i in 0 .. my - 1 loop
613 Move_Cursor (current.wind, i, tmp.x - ul.x + 1);
614 Clear_To_End_Of_Line (current.wind);
617 Refresh_Without_Update (current.wind);
620 -- The C version passes invalid args to resize
621 -- which returns an ERR. For Ada we avoid the exception.
622 if lr.y /= ul.y and lr.x /= ul.x then
623 Resize (current.wind, lr.y - ul.y + 0,
627 Get_Window_Position (current.wind, ul.y, ul.x);
628 Get_Size (current.wind, lr.y, lr.x);
629 lr.y := lr.y + ul.y - 1;
630 lr.x := lr.x + ul.x - 1;
631 Outerbox (ul, lr, True);
632 Refresh_Without_Update;
634 Refresh_Without_Update (current.wind);
635 Move_Cursor (Line => 0, Column => 0);
636 Clear_To_End_Of_Line;
642 declare tmp : pair; tmpbool : Boolean;
644 -- undocumented --- use this to test area clears
645 selectcell (0, 0, Lines - 1, Columns - 1, tmp, tmpbool);
646 Clear_To_End_Of_Screen;
649 when Key_Cursor_Up =>
650 newwin_move (current.wind, -1, 0);
651 when Key_Cursor_Down =>
652 newwin_move (current.wind, 1, 0);
653 when Key_Cursor_Left =>
654 newwin_move (current.wind, 0, -1);
655 when Key_Cursor_Right =>
656 newwin_move (current.wind, 0, 1);
657 when Key_Backspace | Key_Delete_Char =>
663 Get_Cursor_Position (current.wind, y, x);
665 -- I got tricked by the -1 = Max_Natural - 1 result
667 if not (x = 0 and y = 0) then
670 Get_Size (current.wind, tmp, x);
673 Delete_Character (current.wind, y, x);
678 if current /= null then
681 Add (current.wind, Ch => Code_To_Char (c));
683 when Curses_Exception => null;
684 -- this happens if we are at the
685 -- lower right of a window and add a character.
691 newwin_report (current.wind);
692 if current /= null then
693 usescr := current.wind;
695 usescr := Standard_Window;
698 c := Getchar (usescr);
699 exit when c = Quit or (c = Escape and HaveKeyPad (usescr));
700 -- TODO when does c = ERR happen?
703 -- TODO while current /= null loop
704 -- current := delete_framed(current, False);
707 Allow_Scrolling (Mode => True);
710 Set_Raw_Mode (SwitchOn => True);
714 end ncurses2.acs_and_scroll;