Module: Curses

Defined in:
ext/curses/curses.c,
ext/curses/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: sample/hello.rb

  • rain.rb

    :include: sample/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)



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# File 'ext/curses/curses.c', line 617

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



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# File 'ext/curses/curses.c', line 647

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

.attroff(attrs) ⇒ Object

Turns off the named attributes attrs without affecting any others.

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



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# File 'ext/curses/curses.c', line 897

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

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



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# File 'ext/curses/curses.c', line 914

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



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# File 'ext/curses/curses.c', line 931

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



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# File 'ext/curses/curses.c', line 476

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)



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# File 'ext/curses/curses.c', line 973

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)



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# File 'ext/curses/curses.c', line 952

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) 


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# File 'ext/curses/curses.c', line 1168

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



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# File 'ext/curses/curses.c', line 407

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.



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# File 'ext/curses/curses.c', line 248

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.



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# File 'ext/curses/curses.c', line 188

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) 


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# File 'ext/curses/curses.c', line 228

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.



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# File 'ext/curses/curses.c', line 278

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



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# File 'ext/curses/curses.c', line 1196

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



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# File 'ext/curses/curses.c', line 1249

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.



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# File 'ext/curses/curses.c', line 1213

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

.colors ⇒ Object

returns COLORS



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# File 'ext/curses/curses.c', line 1181

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

.cols ⇒ Object

Returns the number of columns on the screen



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# File 'ext/curses/curses.c', line 810

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

.crmode ⇒ 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



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# File 'ext/curses/curses.c', line 407

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

.curs_set(visibility) ⇒ Object

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



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# File 'ext/curses/curses.c', line 825

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



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# File 'ext/curses/curses.c', line 1459

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



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# File 'ext/curses/curses.c', line 728

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

.deleteln ⇒ Object

Delete the line under the cursor.



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# File 'ext/curses/curses.c', line 742

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.



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# File 'ext/curses/curses.c', line 308

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.



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# File 'ext/curses/curses.c', line 326

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

.erase ⇒ Object

Erase the screen.



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# File 'ext/curses/curses.c', line 262

static VALUE
curses_erase(VALUE obj)
{
    curses_stdscr();
    werase(stdscr);
    return Qnil;
}

.ESCDELAY ⇒ Object

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



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# File 'ext/curses/curses.c', line 1052

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

.ESCDELAY=(value) ⇒ Object

Sets the ESCDELAY to Integer value



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# File 'ext/curses/curses.c', line 1037

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

.flash ⇒ Object

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

see also Curses.beep



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# File 'ext/curses/curses.c', line 494

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

.get_char ⇒ Object

Read and returns a character or function key from the window. A single or multibyte character is represented by a String, and a function key is represented by an Integer. Returns nil if no input is ready.

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



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# File 'ext/curses/curses.c', line 2802

static VALUE
curses_get_char(VALUE obj)
{
#ifdef HAVE_GET_WCH
    struct get_wch_arg arg;

    curses_stdscr();
    rb_thread_call_without_gvl(get_wch_func, &arg, RUBY_UBF_IO, 0);
    switch (arg.retval) {
    case OK:
  return keyboard_uint_chr(arg.ch);
    case KEY_CODE_YES:
  return UINT2NUM(arg.ch);
    }
    return Qnil;
#else
    int c;

    curses_stdscr();
    rb_thread_call_without_gvl(getch_func, &c, RUBY_UBF_IO, 0);
    if (c > 0xff) {
  return INT2NUM(c);
    }
    else if (c >= 0) {
  return keyboard_uint_chr(c);
    }
    else {
  return Qnil;
    }
#endif
}

.getch ⇒ Object

Read and returns a character from the window.

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



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# File 'ext/curses/curses.c', line 675

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_external_str_new_with_enc(&ch, 1, keyboard_encoding);
    }
    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



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# File 'ext/curses/curses.c', line 1319

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



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# File 'ext/curses/curses.c', line 712

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_external_str_new_with_enc(rtn, strlen(rtn), keyboard_encoding);
}

.has_colors? ⇒ Boolean

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

Returns:

  • (Boolean) 


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# File 'ext/curses/curses.c', line 1156

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

.inch ⇒ Object

Returns the character at the current position.



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# File 'ext/curses/curses.c', line 602

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.



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# File 'ext/curses/curses.c', line 1142

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.



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# File 'ext/curses/curses.c', line 1118

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



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# File 'ext/curses/curses.c', line 150

static VALUE
curses_init_screen(void)
{
    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.



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# File 'ext/curses/curses.c', line 632

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



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# File 'ext/curses/curses.c', line 758

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

.keyboard_encoding ⇒ Object

Returns the encoding for keyboard input.



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# File 'ext/curses/curses.c', line 2694

static VALUE
curses_get_keyboard_encoding(VALUE obj)
{
    return rb_enc_from_encoding(keyboard_encoding);
}

.keyboard_encoding=(encoding) ⇒ Object

Sets the encoding for keyboard input.



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# File 'ext/curses/curses.c', line 2706

static VALUE
curses_set_keyboard_encoding(VALUE obj, VALUE enc)
{
    keyboard_encoding = rb_to_encoding(enc);
    return enc;
}

.keyname(c) ⇒ Object

Returns the character string corresponding to key c



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# File 'ext/curses/curses.c', line 774

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



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# File 'ext/curses/curses.c', line 799

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.



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# File 'ext/curses/curses.c', line 1366

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



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# File 'ext/curses/curses.c', line 1379

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.



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# File 'ext/curses/curses.c', line 444

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.



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# File 'ext/curses/curses.c', line 422

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.



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# File 'ext/curses/curses.c', line 422

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.



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# File 'ext/curses/curses.c', line 340

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



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# File 'ext/curses/curses.c', line 460

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



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# File 'ext/curses/curses.c', line 377

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



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# File 'ext/curses/curses.c', line 1229

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.



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# File 'ext/curses/curses.c', line 1261

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.



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# File 'ext/curses/curses.c', line 362

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

.refresh ⇒ Object

Refreshes the windows and lines.



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# File 'ext/curses/curses.c', line 292

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



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# File 'ext/curses/curses.c', line 1478

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



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# File 'ext/curses/curses.c', line 1076

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



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# File 'ext/curses/curses.c', line 1076

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.



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# File 'ext/curses/curses.c', line 849

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



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# File 'ext/curses/curses.c', line 555

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

.setscrreg(top, bottom) ⇒ 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.



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# File 'ext/curses/curses.c', line 876

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.



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# File 'ext/curses/curses.c', line 589

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



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# File 'ext/curses/curses.c', line 572

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



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# File 'ext/curses/curses.c', line 1096

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.



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# File 'ext/curses/curses.c', line 1022

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

.TABSIZE=(value) ⇒ Object

Sets the TABSIZE to Integer value



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# File 'ext/curses/curses.c', line 1008

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

.terminal_encoding ⇒ Object

Returns the encoding for terminal output.



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# File 'ext/curses/curses.c', line 2719

static VALUE
curses_get_terminal_encoding(VALUE obj)
{
    return rb_enc_from_encoding(terminal_encoding);
}

.terminal_encoding=(encoding) ⇒ Object

Sets the encoding for terminal output.



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# File 'ext/curses/curses.c', line 2731

static VALUE
curses_set_terminal_encoding(VALUE obj, VALUE enc)
{
    terminal_encoding = rb_to_encoding(enc);
    return enc;
}

.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.

.unget_char(ch) ⇒ Object

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

There is just one input queue for all windows.



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# File 'ext/curses/curses.c', line 2747

static VALUE
curses_unget_char(VALUE obj, VALUE ch)
{
#ifdef HAVE_UNGET_WCH
    ID id_ord;
#endif

    curses_stdscr();
    if (FIXNUM_P(ch)) {
  ungetch(NUM2UINT(ch));
    }
    else {
  StringValue(ch);
#ifdef HAVE_UNGET_WCH
  CONST_ID(id_ord, "ord");
  unget_wch(NUM2UINT(rb_funcall(ch, id_ord, 0)));
#else
  ungetch(NUM2UINT(ch));
#endif
    }
    return Qnil;
}

.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.



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# File 'ext/curses/curses.c', line 535

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

.ungetmouse(mevent) ⇒ 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.



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# File 'ext/curses/curses.c', line 1340

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)



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# File 'ext/curses/curses.c', line 990

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