curs_pad(3X)                                                   curs_pad(3X)


   NAME
         curspad:  newpad, subpad, prefresh, pnoutrefresh, pechochar - create
         and display curses pads

   SYNOPSIS
         #include <curses.h>

         WINDOW *newpad(int nlines, int ncols);
         WINDOW *subpad(WINDOW *orig, int nlines, int ncols,
               int beginy, int beginx);
         int prefresh(WINDOW *pad, int pminrow, int pmincol,
               int sminrow, int smincol, int smaxrow, int smaxcol);
         int pnoutrefresh(WINDOW *pad, int pminrow, int pmincol,
               int sminrow, int smincol, int smaxrow, int smaxcol);
         int pechochar(WINDOW *pad, chtype ch);

   DESCRIPTION
         The newpad routine creates and returns a pointer to a new pad data
         structure with the given number of lines, nlines, and columns, ncols.
         A pad is like a window, except that it is not restricted by the
         screen size, and is not necessarily associated with a particular part
         of the screen.  Pads can be used when a large window is needed, and
         only a part of the window will be on the screen at one time.
         Automatic refreshes of pads (e.g., from scrolling or echoing of
         input) do not occur.  It is not legal to call wrefresh with a pad as
         an argument; the routines prefresh or pnoutrefresh should be called
         instead.  Note that these routines require additional parameters to
         specify the part of the pad to be displayed and the location on the
         screen to be used for the display.

         The subpad routine creates and returns a pointer to a subwindow
         within a pad with the given number of lines, nlines, and columns,
         ncols.  Unlike subwin, which uses screen coordinates, the window is
         at position (begin_x, begin_y) on the pad.  The window is made in the
         middle of the window orig, so that changes made to one window affect
         both windows.  During the use of this routine, it will often be
         necessary to call touchwin or touchline on orig before calling
         prefresh.

         The prefresh and pnoutrefresh routines are analogous to wrefresh and
         wnoutrefresh except that they relate to pads instead of windows.  The
         additional parameters are needed to indicate what part of the pad and
         screen are involved.  pminrow and pmincol specify the upper left-hand
         corner of the rectangle to be displayed in the pad.  sminrow,
         smincol, smaxrow, and smaxcol specify the edges of the rectangle to
         be displayed on the screen.  The lower right-hand corner of the
         rectangle to be displayed in the pad is calculated from the screen
         coordinates, since the rectangles must be the same size.  Both
         rectangles must be entirely contained within their respective
         structures.  Negative values of pminrow, pmincol, sminrow, or smincol
         are treated as if they were zero.


   7/91                                                                 Page 1

   curs_pad(3X)                                                   curs_pad(3X)


         The pechochar routine is functionally equivalent to a call to addch
         followed by a call to refresh, a call to waddch followed by a call to
         wrefresh, or a call to waddch followed by a call to prefresh.  The
         knowledge that only a single character is being output is taken into
         consideration and, for non-control characters, a considerable
         performance gain might be seen by using these routines instead of
         their equivalents.  In the case of pechochar, the last location of
         the pad on the screen is reused for the arguments to prefresh.

   RETURN VALUE
         Routines that return an integer return ERR upon failure and an
         integer value other than ERR upon successful completion.

         Routines that return pointers return NULL on error.

   NOTES
         The header file <curses.h> automatically includes the header files
         <stdio.h> and <unctrl.h>.

         Note that pechochar may be a macro.

   SEE ALSO
         curses(3X), cursrefresh(3X), curstouch(3X), cursaddch(3X).






























   Page 2                                                                 7/91