Module: Curses

Defined in:
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, Window

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)



578
579
580
581
582
583
584
# File 'curses.c', line 578

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



608
609
610
611
612
613
614
615
616
617
618
# File 'curses.c', line 608

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.



857
858
859
860
861
862
863
# File 'curses.c', line 857

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.



874
875
876
877
878
879
880
# File 'curses.c', line 874

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



891
892
893
894
895
896
897
# File 'curses.c', line 891

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

.beepObject

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

see also Curses.flash



437
438
439
440
441
442
443
444
445
# File 'curses.c', line 437

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)



933
934
935
936
937
938
939
940
941
942
# File 'curses.c', line 933

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)



912
913
914
915
916
917
918
919
920
# File 'curses.c', line 912

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)


1128
1129
1130
1131
1132
1133
# File 'curses.c', line 1128

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

.cbreakObject

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



368
369
370
371
372
373
374
# File 'curses.c', line 368

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

.clearObject

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



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

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

.close_screenObject

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.



166
167
168
169
170
171
172
173
174
175
176
# File 'curses.c', line 166

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)


206
207
208
209
210
211
212
213
214
# File 'curses.c', line 206

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

.clrtoeolObject

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



239
240
241
242
243
244
245
# File 'curses.c', line 239

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



1156
1157
1158
1159
1160
1161
1162
1163
1164
# File 'curses.c', line 1156

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



1209
1210
1211
1212
1213
# File 'curses.c', line 1209

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

.color_pairsObject

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



1173
1174
1175
1176
1177
# File 'curses.c', line 1173

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

.colorsObject

returns COLORS



1141
1142
1143
1144
1145
# File 'curses.c', line 1141

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

.colsObject

Returns the number of columns on the screen



771
772
773
774
775
# File 'curses.c', line 771

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

.crmodeObject

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

See Curses.cbreak for more detail.



383
384
385
386
387
388
389
# File 'curses.c', line 383

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



786
787
788
789
790
791
792
793
794
795
796
# File 'curses.c', line 786

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_modeObject

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



1403
1404
1405
1406
1407
1408
# File 'curses.c', line 1403

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

.delchObject

Delete the character under the cursor



689
690
691
692
693
694
695
# File 'curses.c', line 689

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

.deletelnObject

Delete the line under the cursor.



703
704
705
706
707
708
709
710
711
# File 'curses.c', line 703

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

.doupdateObject

Refreshes the windows and lines.

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



269
270
271
272
273
274
275
276
277
278
279
# File 'curses.c', line 269

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

.echoObject

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



287
288
289
290
291
292
293
# File 'curses.c', line 287

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

.ESCDELAYObject

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



1012
1013
1014
1015
1016
# File 'curses.c', line 1012

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

.ESCDELAY=(value) ⇒ Object

Sets the ESCDELAY to Integer value



997
998
999
1000
1001
1002
# File 'curses.c', line 997

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

.flashObject

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

see also Curses.beep



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

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

.getchObject

Read and returns a character from the window.

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



636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
# File 'curses.c', line 636

static VALUE
curses_getch(VALUE obj)
{
    int c;

    curses_stdscr();
    rb_thread_blocking_region(getch_func, (void *)&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);
}

.getmouseObject

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



1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
# File 'curses.c', line 1263

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

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

.getstrObject

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



673
674
675
676
677
678
679
680
681
# File 'curses.c', line 673

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

    curses_stdscr();
    rb_thread_blocking_region(getstr_func, (void *)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)


1116
1117
1118
1119
1120
1121
# File 'curses.c', line 1116

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

.inchObject

Returns the character at the current position.



563
564
565
566
567
568
# File 'curses.c', line 563

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.



1102
1103
1104
1105
1106
1107
1108
1109
# File 'curses.c', line 1102

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.



1078
1079
1080
1081
1082
1083
1084
# File 'curses.c', line 1078

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_screenObject

Initialize a standard screen

see also Curses.stdscr



127
128
129
130
131
132
133
134
135
136
137
138
139
# File 'curses.c', line 127

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.



593
594
595
596
597
598
599
# File 'curses.c', line 593

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

.insertlnObject

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



719
720
721
722
723
724
725
726
727
# File 'curses.c', line 719

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



735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
# File 'curses.c', line 735

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
}

.linesObject

Returns the number of lines on the screen



760
761
762
763
764
# File 'curses.c', line 760

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.



1310
1311
1312
1313
1314
1315
# File 'curses.c', line 1310

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



1323
1324
1325
1326
1327
1328
# File 'curses.c', line 1323

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

.nlObject

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.



405
406
407
408
409
410
411
# File 'curses.c', line 405

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

.nocbreakObject

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

See Curses.cbreak for more detail.



383
384
385
386
387
388
389
# File 'curses.c', line 383

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

.nocrmodeObject

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

See Curses.cbreak for more detail.



383
384
385
386
387
388
389
# File 'curses.c', line 383

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

.noechoObject

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



301
302
303
304
305
306
307
# File 'curses.c', line 301

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

.nonlObject

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

See Curses.nl for more detail



421
422
423
424
425
426
427
# File 'curses.c', line 421

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

.norawObject

Put the terminal out of raw mode.

see Curses.raw for more detail



338
339
340
341
342
343
344
# File 'curses.c', line 338

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



1189
1190
1191
1192
1193
1194
1195
1196
1197
# File 'curses.c', line 1189

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.



1221
1222
1223
1224
1225
1226
# File 'curses.c', line 1221

static VALUE
curses_pair_number(VALUE obj, VALUE attrs)
{
    curses_stdscr();
    return INT2FIX(PAIR_NUMBER(NUM2INT(attrs)));
}

.rawObject

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.



323
324
325
326
327
328
329
# File 'curses.c', line 323

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

.refreshObject

Refreshes the windows and lines.



253
254
255
256
257
258
259
# File 'curses.c', line 253

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

.reset_prog_modeObject

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

This is done automatically by Curses.close_screen



1422
1423
1424
1425
1426
1427
# File 'curses.c', line 1422

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



1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
# File 'curses.c', line 1036

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



1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
# File 'curses.c', line 1036

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.



810
811
812
813
814
815
816
817
818
819
820
# File 'curses.c', line 810

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



516
517
518
519
520
521
522
# File 'curses.c', line 516

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

.setscrregObject

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.



837
838
839
840
841
842
843
844
845
846
847
# File 'curses.c', line 837

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
}

.standendObject

Enables the Normal display (no highlight)

This is equivalent to Curses.attron(A_NORMAL)

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



550
551
552
553
554
555
556
# File 'curses.c', line 550

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

.standoutObject

Enables the best highlighting mode of the terminal.

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

see also Curses::Window.attrset additional information



533
534
535
536
537
538
539
# File 'curses.c', line 533

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

.start_colorObject

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



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

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

.stdscrObject

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.

.TABSIZEObject

Returns the number of positions in a tab.



982
983
984
985
986
# File 'curses.c', line 982

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

.TABSIZE=(value) ⇒ Object

Sets the TABSIZE to Integer value



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

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.



496
497
498
499
500
501
502
503
# File 'curses.c', line 496

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

.ungetmouseObject

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.



1284
1285
1286
1287
1288
1289
1290
1291
1292
# File 'curses.c', line 1284

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_colorsObject

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

see also the system manual for default_colors(3)



950
951
952
953
954
955
956
# File 'curses.c', line 950

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