Method: Curses::Window#setscrreg

Defined in:

ext/curses/curses.c

#setscrreg(top, bottom) ⇒ Object

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

If this option and Curses::Window.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.

# File 'ext/curses/curses.c', line 2704

static VALUE
window_setscrreg(VALUE obj, VALUE top, VALUE bottom)
{
#ifdef HAVE_WSETSCRREG
    struct windata *winp;
    int res;

    GetWINDOW(obj, winp);
    res = wsetscrreg(winp->window, NUM2INT(top), NUM2INT(bottom));
    /* may have to raise exception on ERR */
    return (res == OK) ? Qtrue : Qfalse;
#else
    return Qfalse;
#endif
}