Module: Curses

Defined in:
curses.c,
curses.c

Overview

Description

An implementation of the CRT screen handling and optimization library.

Structures and such

Classes

  • Curses::Window - class with the means to draw a window or box

  • Curses::MouseEvent - class for collecting mouse events

Modules

Curses

The curses implementation

Curses::Key

Collection of constants for keypress events

Examples

  • hello.rb

    :include: hello.rb

  • rain.rb

    :include: rain.rb

Defined Under Namespace

Modules: Key Classes: MouseEvent, Pad, Window

Constant Summary collapse

VERSION =

Identifies curses library version.

  • “ncurses 5.9.20110404”

  • “PDCurses 3.4 - Public Domain 2008”

  • “curses (SVR4)” (System V curses)

  • “curses (unknown)” (The original BSD curses? NetBSD maybe.)

version

Class Method Summary collapse

Class Method Details

.addch(ch) ⇒ Object

Add a character ch, with attributes, then advance the cursor.

see also the system manual for curs_addch(3)



596
597
598
599
600
601
602
 
# File 'curses.c', line 596

static VALUE
curses_addch(VALUE obj, VALUE ch)
{
    curses_stdscr();
    addch(NUM2CH(ch));
    return Qnil;
}

.addstr(str) ⇒ Object

add a string of characters str, to the window and advance cursor



626
627
628
629
630
631
632
633
634
635
636
 
# File 'curses.c', line 626

static VALUE
curses_addstr(VALUE obj, VALUE str)
{
    StringValue(str);
    str = rb_str_export_locale(str);
    curses_stdscr();
    if (!NIL_P(str)) {
	addstr(StringValueCStr(str));
    }
    return Qnil;
}

.attroff(attrs) ⇒ Object

Turns on the named attributes attrs without affecting any others.

See also Curses::Window.attrset for additional information.



875
876
877
878
879
880
881
 
# File 'curses.c', line 875

static VALUE
curses_attroff(VALUE obj, VALUE attrs)
{
    curses_stdscr();
    return window_attroff(rb_stdscr,attrs);
    /* return INT2FIX(attroff(NUM2INT(attrs))); */
}

.attron(attrs) ⇒ Object

Turns off the named attributes attrs without turning any other attributes on or off.

See also Curses::Window.attrset for additional information.



892
893
894
895
896
897
898
 
# File 'curses.c', line 892

static VALUE
curses_attron(VALUE obj, VALUE attrs)
{
    curses_stdscr();
    return window_attron(rb_stdscr,attrs);
    /* return INT2FIX(attroff(NUM2INT(attrs))); */
}

.attrset(attrs) ⇒ Object

Sets the current attributes of the given window to attrs.

see also Curses::Window.attrset



909
910
911
912
913
914
915
 
# File 'curses.c', line 909

static VALUE
curses_attrset(VALUE obj, VALUE attrs)
{
    curses_stdscr();
    return window_attrset(rb_stdscr,attrs);
    /* return INT2FIX(attroff(NUM2INT(attrs))); */
}

.beep ⇒ Object

Sounds an audible alarm on the terminal, if possible; otherwise it flashes the screen (visual bell).

see also Curses.flash



455
456
457
458
459
460
461
462
463
 
# File 'curses.c', line 455

static VALUE
curses_beep(VALUE obj)
{
#ifdef HAVE_BEEP
    curses_stdscr();
    beep();
#endif
    return Qnil;
}

.bkgd(ch) ⇒ Object

Window background manipulation routines.

Set the background property of the current and then apply the character Integer ch setting to every character position in that window.

see also the system manual for curs_bkgd(3)



951
952
953
954
955
956
957
958
959
960
 
# File 'curses.c', line 951

static VALUE
curses_bkgd(VALUE obj, VALUE ch)
{
#ifdef HAVE_BKGD
    curses_stdscr();
    return (bkgd(NUM2CH(ch)) == OK) ? Qtrue : Qfalse;
#else
    return Qfalse;
#endif
}

.bkgdset(ch) ⇒ Object

Manipulate the background of the named window with character Integer ch

The background becomes a property of the character and moves with the character through any scrolling and insert/delete line/character operations.

see also the system manual for curs_bkgd(3)



930
931
932
933
934
935
936
937
938
 
# File 'curses.c', line 930

static VALUE
curses_bkgdset(VALUE obj, VALUE ch)
{
#ifdef HAVE_BKGDSET
    curses_stdscr();
    bkgdset(NUM2CH(ch));
#endif
    return Qnil;
}

.can_change_color? ⇒ Boolean

Returns true or false depending on whether the terminal can change color attributes

Returns:

  • (Boolean) 


1146
1147
1148
1149
1150
1151
 
# File 'curses.c', line 1146

static VALUE
curses_can_change_color(VALUE obj)
{
    curses_stdscr();
    return can_change_color() ? Qtrue : Qfalse;
}

.cbreak ⇒ Object

Put the terminal into cbreak mode.

Normally, the tty driver buffers typed characters until a newline or carriage return is typed. The Curses.cbreak routine disables line buffering and erase/kill character-processing (interrupt and flow control characters are unaffected), making characters typed by the user immediately available to the program.

The Curses.nocbreak routine returns the terminal to normal (cooked) mode.

Initially the terminal may or may not be in cbreak mode, as the mode is inherited; therefore, a program should call Curses.cbreak or Curses.nocbreak explicitly. Most interactive programs using curses set the cbreak mode. Note that Curses.cbreak overrides Curses.raw.

see also Curses.raw



386
387
388
389
390
391
392
 
# File 'curses.c', line 386

static VALUE
curses_cbreak(VALUE obj)
{
    curses_stdscr();
    cbreak();
    return Qnil;
}

.clear ⇒ Object

Clears every position on the screen completely, so that a subsequent call by Curses.refresh for the screen/window will be repainted from scratch.



244
245
246
247
248
249
250
 
# File 'curses.c', line 244

static VALUE
curses_clear(VALUE obj)
{
    curses_stdscr();
    wclear(stdscr);
    return Qnil;
}

.close_screen ⇒ Object

A program should always call Curses.close_screen before exiting or escaping from curses mode temporarily. This routine restores tty modes, moves the cursor to the lower left-hand corner of the screen and resets the terminal into the proper non-visual mode.

Calling Curses.refresh or Curses.doupdate after a temporary escape causes the program to resume visual mode.



184
185
186
187
188
189
190
191
192
193
194
 
# File 'curses.c', line 184

static VALUE
curses_close_screen(void)
{
    curses_stdscr();
#ifdef HAVE_ISENDWIN
    if (!isendwin())
#endif
	endwin();
    rb_stdscr = 0;
    return Qnil;
}

.closed? ⇒ Boolean

Returns true if the window/screen has been closed, without any subsequent Curses.refresh calls, returns false otherwise.

Returns:

  • (Boolean) 


224
225
226
227
228
229
230
231
232
 
# File 'curses.c', line 224

static VALUE
curses_closed(void)
{
    curses_stdscr();
    if (isendwin()) {
	return Qtrue;
    }
    return Qfalse;
}

.clrtoeol ⇒ Object

Clears to the end of line, that the cursor is currently on.



257
258
259
260
261
262
263
 
# File 'curses.c', line 257

static VALUE
curses_clrtoeol(void)
{
    curses_stdscr();
    clrtoeol();
    return Qnil;
}

.color_content(color) ⇒ Object

Returns an 3 item Array of the RGB values in color



1174
1175
1176
1177
1178
1179
1180
1181
1182
 
# File 'curses.c', line 1174

static VALUE
curses_color_content(VALUE obj, VALUE color)
{
    short r,g,b;

    curses_stdscr();
    color_content(NUM2INT(color),&r,&g,&b);
    return rb_ary_new3(3,INT2FIX(r),INT2FIX(g),INT2FIX(b));
}

.color_pair(attrs) ⇒ Object

Sets the color pair attributes to attrs.

This should be equivalent to Curses.attrset(COLOR_PAIR(attrs))

TODO: validate that equivalency



1227
1228
1229
1230
1231
 
# File 'curses.c', line 1227

static VALUE
curses_color_pair(VALUE obj, VALUE attrs)
{
    return INT2FIX(COLOR_PAIR(NUM2INT(attrs)));
}

.color_pairs ⇒ Object

Returns the COLOR_PAIRS available, if the curses library supports it.



1191
1192
1193
1194
1195
 
# File 'curses.c', line 1191

static VALUE
curses_color_pairs(VALUE obj)
{
    return INT2FIX(COLOR_PAIRS);
}

.colors ⇒ Object

returns COLORS



1159
1160
1161
1162
1163
 
# File 'curses.c', line 1159

static VALUE
curses_colors(VALUE obj)
{
    return INT2FIX(COLORS);
}

.cols ⇒ Object

Returns the number of columns on the screen



789
790
791
792
793
 
# File 'curses.c', line 789

static VALUE
curses_cols(void)
{
    return INT2FIX(COLS);
}

.crmode ⇒ Object

Put the terminal into normal mode (out of cbreak mode).

See Curses.cbreak for more detail.



401
402
403
404
405
406
407
 
# File 'curses.c', line 401

static VALUE
curses_nocbreak(VALUE obj)
{
    curses_stdscr();
    nocbreak();
    return Qnil;
}

.curs_set(visibility) ⇒ Object

Sets Cursor Visibility. 0: invisible 1: visible 2: very visible



804
805
806
807
808
809
810
811
812
813
814
 
# File 'curses.c', line 804

static VALUE
curses_curs_set(VALUE obj, VALUE visibility)
{
#ifdef HAVE_CURS_SET
    int n;
    curses_stdscr();
    return (n = curs_set(NUM2INT(visibility)) != ERR) ? INT2FIX(n) : Qnil;
#else
    return Qnil;
#endif
}

.def_prog_mode ⇒ Object

Save the current terminal modes as the “program” state for use by the Curses.reset_prog_mode

This is done automatically by Curses.init_screen



1437
1438
1439
1440
1441
1442
 
# File 'curses.c', line 1437

static VALUE
curses_def_prog_mode(VALUE obj)
{
    curses_stdscr();
    return def_prog_mode() == OK ? Qtrue : Qfalse;
}

.delch ⇒ Object

Delete the character under the cursor



707
708
709
710
711
712
713
 
# File 'curses.c', line 707

static VALUE
curses_delch(VALUE obj)
{
    curses_stdscr();
    delch();
    return Qnil;
}

.deleteln ⇒ Object

Delete the line under the cursor.



721
722
723
724
725
726
727
728
729
 
# File 'curses.c', line 721

static VALUE
curses_deleteln(VALUE obj)
{
    curses_stdscr();
#if defined(HAVE_DELETELN) || defined(deleteln)
    deleteln();
#endif
    return Qnil;
}

.doupdate ⇒ Object

Refreshes the windows and lines.

Curses.doupdate allows multiple updates with more efficiency than Curses.refresh alone.



287
288
289
290
291
292
293
294
295
296
297
 
# File 'curses.c', line 287

static VALUE
curses_doupdate(VALUE obj)
{
    curses_stdscr();
#ifdef HAVE_DOUPDATE
    doupdate();
#else
    refresh();
#endif
    return Qnil;
}

.echo ⇒ Object

Enables characters typed by the user to be echoed by Curses.getch as they are typed.



305
306
307
308
309
310
311
 
# File 'curses.c', line 305

static VALUE
curses_echo(VALUE obj)
{
    curses_stdscr();
    echo();
    return Qnil;
}

.ESCDELAY ⇒ Object

Returns the total time, in milliseconds, for which curses will await a character sequence, e.g., a function key



1030
1031
1032
1033
1034
 
# File 'curses.c', line 1030

static VALUE
curses_escdelay_get(VALUE obj)
{
    return INT2NUM(ESCDELAY);
}

.ESCDELAY=(value) ⇒ Object

Sets the ESCDELAY to Integer value



1015
1016
1017
1018
1019
1020
 
# File 'curses.c', line 1015

static VALUE
curses_escdelay_set(VALUE obj, VALUE val)
{
    ESCDELAY = NUM2INT(val);
    return INT2NUM(ESCDELAY);
}

.flash ⇒ Object

Flashs the screen, for visual alarm on the terminal, if possible; otherwise it sounds the alert.

see also Curses.beep



473
474
475
476
477
478
479
480
481
 
# File 'curses.c', line 473

static VALUE
curses_flash(VALUE obj)
{
#ifdef HAVE_FLASH
    curses_stdscr();
    flash();
#endif
    return Qnil;
}

.getch ⇒ Object

Read and returns a character from the window.

See Curses::Key to all the function KEY_* available



654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
 
# File 'curses.c', line 654

static VALUE
curses_getch(VALUE obj)
{
    int c;

    curses_stdscr();
    rb_thread_call_without_gvl(getch_func, &c, RUBY_UBF_IO, 0);
    if (c == EOF) return Qnil;
    if (rb_isprint(c)) {
	char ch = (char)c;

	return rb_locale_str_new(&ch, 1);
    }
    return UINT2NUM(c);
}

.getmouse ⇒ Object

Returns coordinates of the mouse.

This will read and pop the mouse event data off the queue

See the BUTTON*, ALL_MOUSE_EVENTS and REPORT_MOUSE_POSITION constants, to examine the mask of the event



1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
 
# File 'curses.c', line 1297

static VALUE
curses_getmouse(VALUE obj)
{
    struct mousedata *mdata;
    VALUE val;

    curses_stdscr();
    val = TypedData_Make_Struct(cMouseEvent,struct mousedata,
				&mousedata_type,mdata);
    mdata->mevent = (MEVENT*)xmalloc(sizeof(MEVENT));
    return (getmouse(mdata->mevent) == OK) ? val : Qnil;
}

.getstr ⇒ Object

This is equivalent to a series f Curses::Window.getch calls



691
692
693
694
695
696
697
698
699
 
# File 'curses.c', line 691

static VALUE
curses_getstr(VALUE obj)
{
    char rtn[GETSTR_BUF_SIZE];

    curses_stdscr();
    rb_thread_call_without_gvl(getstr_func, rtn, RUBY_UBF_IO, 0);
    return rb_locale_str_new_cstr(rtn);
}

.has_colors? ⇒ Boolean

Returns true or false depending on whether the terminal has color capbilities.

Returns:

  • (Boolean) 


1134
1135
1136
1137
1138
1139
 
# File 'curses.c', line 1134

static VALUE
curses_has_colors(VALUE obj)
{
    curses_stdscr();
    return has_colors() ? Qtrue : Qfalse;
}

.inch ⇒ Object

Returns the character at the current position.



581
582
583
584
585
586
 
# File 'curses.c', line 581

static VALUE
curses_inch(VALUE obj)
{
    curses_stdscr();
    return CH2FIX(inch());
}

.init_color(color, r, g, b) ⇒ Object

Changes the definition of a color. It takes four arguments:

  • the number of the color to be changed, color

  • the amount of red, r

  • the amount of green, g

  • the amount of blue, b

The value of the first argument must be between 0 and COLORS. (See the section Colors for the default color index.) Each of the last three arguments must be a value between 0 and 1000. When Curses.init_color is used, all occurrences of that color on the screen immediately change to the new definition.



1120
1121
1122
1123
1124
1125
1126
1127
 
# File 'curses.c', line 1120

static VALUE
curses_init_color(VALUE obj, VALUE color, VALUE r, VALUE g, VALUE b)
{
    /* may have to raise exception on ERR */
    curses_stdscr();
    return (init_color(NUM2INT(color),NUM2INT(r),
		       NUM2INT(g),NUM2INT(b)) == OK) ? Qtrue : Qfalse;
}

.init_pair(pair, f, b) ⇒ Object

Changes the definition of a color-pair.

It takes three arguments: the number of the color-pair to be changed pair, the foreground color number f, and the background color number b.

If the color-pair was previously initialized, the screen is refreshed and all occurrences of that color-pair are changed to the new definition.



1096
1097
1098
1099
1100
1101
1102
 
# File 'curses.c', line 1096

static VALUE
curses_init_pair(VALUE obj, VALUE pair, VALUE f, VALUE b)
{
    /* may have to raise exception on ERR */
    curses_stdscr();
    return (init_pair(NUM2INT(pair),NUM2INT(f),NUM2INT(b)) == OK) ? Qtrue : Qfalse;
}

.init_screen ⇒ Object

Initialize a standard screen

see also Curses.stdscr



145
146
147
148
149
150
151
152
153
154
155
156
157
 
# File 'curses.c', line 145

static VALUE
curses_init_screen(void)
{
    rb_secure(4);
    if (rb_stdscr) return rb_stdscr;
    initscr();
    if (stdscr == 0) {
	rb_raise(rb_eRuntimeError, "can't initialize curses");
    }
    clear();
    rb_stdscr = prep_window(cWindow, stdscr);
    return rb_stdscr;
}

.insch(ch) ⇒ Object

Insert a character ch, before the cursor.



611
612
613
614
615
616
617
 
# File 'curses.c', line 611

static VALUE
curses_insch(VALUE obj, VALUE ch)
{
    curses_stdscr();
    insch(NUM2CH(ch));
    return Qnil;
}

.insertln ⇒ Object

Inserts a line above the cursor, and the bottom line is lost



737
738
739
740
741
742
743
744
745
 
# File 'curses.c', line 737

static VALUE
curses_insertln(VALUE obj)
{
    curses_stdscr();
#if defined(HAVE_INSERTLN) || defined(insertln)
    insertln();
#endif
    return Qnil;
}

.keyname(c) ⇒ Object

Returns the character string corresponding to key c



753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
 
# File 'curses.c', line 753

static VALUE
curses_keyname(VALUE obj, VALUE c)
{
#ifdef HAVE_KEYNAME
    int cc = curses_char(c);
    const char *name;

    curses_stdscr();
    name = keyname(cc);
    if (name) {
	return rb_str_new_cstr(name);
    }
    else {
	return Qnil;
    }
#else
    return Qnil;
#endif
}

.lines ⇒ Object

Returns the number of lines on the screen



778
779
780
781
782
 
# File 'curses.c', line 778

static VALUE
curses_lines(void)
{
    return INT2FIX(LINES);
}

.mouseinterval(interval) ⇒ Object

The Curses.mouseinterval function sets the maximum time (in thousands of a second) that can elapse between press and release events for them to be recognized as a click.

Use Curses.mouseinterval(0) to disable click resolution. This function returns the previous interval value.

Use Curses.mouseinterval(-1) to obtain the interval without altering it.

The default is one sixth of a second.



1344
1345
1346
1347
1348
1349
 
# File 'curses.c', line 1344

static VALUE
curses_mouseinterval(VALUE obj, VALUE interval)
{
    curses_stdscr();
    return mouseinterval(NUM2INT(interval)) ? Qtrue : Qfalse;
}

.mousemask(mask) ⇒ Object

Returns the mask of the reportable events



1357
1358
1359
1360
1361
1362
 
# File 'curses.c', line 1357

static VALUE
curses_mousemask(VALUE obj, VALUE mask)
{
    curses_stdscr();
    return INT2NUM(mousemask(NUM2UINT(mask),NULL));
}

.nl ⇒ Object

Enable the underlying display device to translate the return key into newline on input, and whether it translates newline into return and line-feed on output (in either case, the call Curses.addch(‘n’) does the equivalent of return and line feed on the virtual screen).

Initially, these translations do occur. If you disable them using Curses.nonl, curses will be able to make better use of the line-feed capability, resulting in faster cursor motion. Also, curses will then be able to detect the return key.



423
424
425
426
427
428
429
 
# File 'curses.c', line 423

static VALUE
curses_nl(VALUE obj)
{
    curses_stdscr();
    nl();
    return Qnil;
}

.nocbreak ⇒ Object

Put the terminal into normal mode (out of cbreak mode).

See Curses.cbreak for more detail.



401
402
403
404
405
406
407
 
# File 'curses.c', line 401

static VALUE
curses_nocbreak(VALUE obj)
{
    curses_stdscr();
    nocbreak();
    return Qnil;
}

.nocrmode ⇒ Object

Put the terminal into normal mode (out of cbreak mode).

See Curses.cbreak for more detail.



401
402
403
404
405
406
407
 
# File 'curses.c', line 401

static VALUE
curses_nocbreak(VALUE obj)
{
    curses_stdscr();
    nocbreak();
    return Qnil;
}

.noecho ⇒ Object

Disables characters typed by the user to be echoed by Curses.getch as they are typed.



319
320
321
322
323
324
325
 
# File 'curses.c', line 319

static VALUE
curses_noecho(VALUE obj)
{
    curses_stdscr();
    noecho();
    return Qnil;
}

.nonl ⇒ Object

Disable the underlying display device to translate the return key into newline on input

See Curses.nl for more detail



439
440
441
442
443
444
445
 
# File 'curses.c', line 439

static VALUE
curses_nonl(VALUE obj)
{
    curses_stdscr();
    nonl();
    return Qnil;
}

.noraw ⇒ Object

Put the terminal out of raw mode.

see Curses.raw for more detail



356
357
358
359
360
361
362
 
# File 'curses.c', line 356

static VALUE
curses_noraw(VALUE obj)
{
    curses_stdscr();
    noraw();
    return Qnil;
}

.pair_content(pair) ⇒ Object

Returns a 2 item Array, with the foreground and background color, in pair



1207
1208
1209
1210
1211
1212
1213
1214
1215
 
# File 'curses.c', line 1207

static VALUE
curses_pair_content(VALUE obj, VALUE pair)
{
    short f,b;

    curses_stdscr();
    pair_content(NUM2INT(pair),&f,&b);
    return rb_ary_new3(2,INT2FIX(f),INT2FIX(b));
}

.pair_number(attrs) ⇒ Object

Returns the Fixnum color pair number of attributes attrs.



1239
1240
1241
1242
1243
1244
 
# File 'curses.c', line 1239

static VALUE
curses_pair_number(VALUE obj, VALUE attrs)
{
    curses_stdscr();
    return INT2FIX(PAIR_NUMBER(NUM2LONG(attrs)));
}

.raw ⇒ Object

Put the terminal into raw mode.

Raw mode is similar to Curses.cbreak mode, in that characters typed are immediately passed through to the user program.

The differences are that in raw mode, the interrupt, quit, suspend, and flow control characters are all passed through uninterpreted, instead of generating a signal. The behavior of the BREAK key depends on other bits in the tty driver that are not set by curses.



341
342
343
344
345
346
347
 
# File 'curses.c', line 341

static VALUE
curses_raw(VALUE obj)
{
    curses_stdscr();
    raw();
    return Qnil;
}

.refresh ⇒ Object

Refreshes the windows and lines.



271
272
273
274
275
276
277
 
# File 'curses.c', line 271

static VALUE
curses_refresh(VALUE obj)
{
    curses_stdscr();
    refresh();
    return Qnil;
}

.reset_prog_mode ⇒ Object

Reset the current terminal modes to the saved state by the Curses.def_prog_mode

This is done automatically by Curses.close_screen



1456
1457
1458
1459
1460
1461
 
# File 'curses.c', line 1456

static VALUE
curses_reset_prog_mode(VALUE obj)
{
    curses_stdscr();
    return reset_prog_mode() == OK ? Qtrue : Qfalse;
}

.resizeterm(lines, cols) ⇒ Object

Resize the current term to Fixnum lines and Fixnum cols



1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
 
# File 'curses.c', line 1054

static VALUE
curses_resizeterm(VALUE obj, VALUE lin, VALUE col)
{
#if defined(HAVE_RESIZETERM)
    curses_stdscr();
    return (resizeterm(NUM2INT(lin),NUM2INT(col)) == OK) ? Qtrue : Qfalse;
#else
    return Qnil;
#endif
}

.resizeterm(lines, cols) ⇒ Object

Resize the current term to Fixnum lines and Fixnum cols



1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
 
# File 'curses.c', line 1054

static VALUE
curses_resizeterm(VALUE obj, VALUE lin, VALUE col)
{
#if defined(HAVE_RESIZETERM)
    curses_stdscr();
    return (resizeterm(NUM2INT(lin),NUM2INT(col)) == OK) ? Qtrue : Qfalse;
#else
    return Qnil;
#endif
}

.scrl(num) ⇒ Object

Scrolls the current window Fixnum num lines. The current cursor position is not changed.

For positive num, it scrolls up.

For negative num, it scrolls down.



828
829
830
831
832
833
834
835
836
837
838
 
# File 'curses.c', line 828

static VALUE
curses_scrl(VALUE obj, VALUE n)
{
    /* may have to raise exception on ERR */
#ifdef HAVE_SCRL
    curses_stdscr();
    return (scrl(NUM2INT(n)) == OK) ? Qtrue : Qfalse;
#else
    return Qfalse;
#endif
}

.setpos(y, x) ⇒ Object

A setter for the position of the cursor, using coordinates x and y



534
535
536
537
538
539
540
 
# File 'curses.c', line 534

static VALUE
curses_setpos(VALUE obj, VALUE y, VALUE x)
{
    curses_stdscr();
    move(NUM2INT(y), NUM2INT(x));
    return Qnil;
}

.setscrreg ⇒ Object

call-seq:

setscrreg(top, bottom)

Set a software scrolling region in a window. top and bottom are lines numbers of the margin.

If this option and Curses.scrollok are enabled, an attempt to move off the bottom margin line causes all lines in the scrolling region to scroll one line in the direction of the first line. Only the text of the window is scrolled.



855
856
857
858
859
860
861
862
863
864
865
 
# File 'curses.c', line 855

static VALUE
curses_setscrreg(VALUE obj, VALUE top, VALUE bottom)
{
    /* may have to raise exception on ERR */
#ifdef HAVE_SETSCRREG
    curses_stdscr();
    return (setscrreg(NUM2INT(top), NUM2INT(bottom)) == OK) ? Qtrue : Qfalse;
#else
    return Qfalse;
#endif
}

.standend ⇒ Object

Enables the Normal display (no highlight)

This is equivalent to Curses.attron(A_NORMAL)

see also Curses::Window.attrset for additional information.



568
569
570
571
572
573
574
 
# File 'curses.c', line 568

static VALUE
curses_standend(VALUE obj)
{
    curses_stdscr();
    standend();
    return Qnil;
}

.standout ⇒ Object

Enables the best highlighting mode of the terminal.

This is equivalent to Curses:Window.attron(A_STANDOUT)

see also Curses::Window.attrset additional information



551
552
553
554
555
556
557
 
# File 'curses.c', line 551

static VALUE
curses_standout(VALUE obj)
{
    curses_stdscr();
    standout();
    return Qnil;
}

.start_color ⇒ Object

Initializes the color attributes, for terminals that support it.

This must be called, in order to use color attributes. It is good practice to call it just after Curses.init_screen



1074
1075
1076
1077
1078
1079
1080
 
# File 'curses.c', line 1074

static VALUE
curses_start_color(VALUE obj)
{
    /* may have to raise exception on ERR */
    curses_stdscr();
    return (start_color() == OK) ? Qtrue : Qfalse;
}

.stdscr ⇒ Object

The Standard Screen.

Upon initializing curses, a default window called stdscr, which is the size of the terminal screen, is created.

Many curses functions use this window.

.TABSIZE ⇒ Object

Returns the number of positions in a tab.



1000
1001
1002
1003
1004
 
# File 'curses.c', line 1000

static VALUE
curses_tabsize_get(VALUE ojb)
{
    return INT2NUM(TABSIZE);
}

.TABSIZE=(value) ⇒ Object

Sets the TABSIZE to Integer value



986
987
988
989
990
991
 
# File 'curses.c', line 986

static VALUE
curses_tabsize_set(VALUE obj, VALUE val)
{
    TABSIZE = NUM2INT(val);
    return INT2NUM(TABSIZE);
}

.timeout=(delay) ⇒ Object

Sets block and non-blocking reads for the window.

  • If delay is negative, blocking read is used (i.e., waits indefinitely for input).

  • If delay is zero, then non-blocking read is used (i.e., read returns ERR if no input is waiting).

  • If delay is positive, then read blocks for delay milliseconds, and returns ERR if there is still no input.

.ungetch(ch) ⇒ Object

Places ch back onto the input queue to be returned by the next call to Curses.getch.

There is just one input queue for all windows.



514
515
516
517
518
519
520
521
 
# File 'curses.c', line 514

static VALUE
curses_ungetch(VALUE obj, VALUE ch)
{
    int c = curses_char(ch);
    curses_stdscr();
    ungetch(c);
    return Qnil;
}

.ungetmouse ⇒ Object

It pushes a KEY_MOUSE event onto the input queue, and associates with that event the given state data and screen-relative character-cell coordinates.

The Curses.ungetmouse function behaves analogously to Curses.ungetch.



1318
1319
1320
1321
1322
1323
1324
1325
1326
 
# File 'curses.c', line 1318

static VALUE
curses_ungetmouse(VALUE obj, VALUE mevent)
{
    struct mousedata *mdata;

    curses_stdscr();
    GetMOUSE(mevent,mdata);
    return (ungetmouse(mdata->mevent) == OK) ? Qtrue : Qfalse;
}

.use_default_colors ⇒ Object

tells the curses library to use terminal’s default colors.

see also the system manual for default_colors(3)



968
969
970
971
972
973
974
 
# File 'curses.c', line 968

static VALUE
curses_use_default_colors(VALUE obj)
{
    curses_stdscr();
    use_default_colors();
    return Qnil;
}