User  |  Syst  |  Libr  |  Device  |  Files  |  Other  |  Admin  |  Head  |

---

   overlay.3x    ( 3 )

---

---

Имя (Name)

overlay, overwrite, copywin - overlay and manipulate overlapped
       curses windows

---

Синопсис (Synopsis)

#include <curses.h>

       int overlay(const WINDOW *srcwin, WINDOW *dstwin);
       int overwrite(const WINDOW *srcwin, WINDOW *dstwin);
       int copywin(const WINDOW *srcwin, WINDOW *dstwin, int sminrow,
             int smincol, int dminrow, int dmincol, int dmaxrow,
             int dmaxcol, int overlay);

---

Описание (Description)

overlay, overwrite
       The overlay and overwrite routines overlay srcwin on top of
       dstwin.  scrwin and dstwin are not required to be the same size;
       only text where the two windows overlap is copied.  The
       difference is that overlay is non-destructive (blanks are not
       copied) whereas overwrite is destructive.

   copywin
       The copywin routine provides a finer granularity of control over
       the overlay and overwrite routines.  As in the prefresh routine,
       a rectangle is specified in the destination window, (dminrow,
       dmincol) and (dmaxrow, dmaxcol), and the upper-left-corner
       coordinates of the source window, (sminrow, smincol).  If the
       argument overlay is true, then copying is non-destructive, as in
       overlay.

---

Возвращаемое значение (Return value)

Routines that return an integer return ERR upon failure, and OK
       (SVr4 only specifies "an integer value other than ERR") upon
       successful completion.

       X/Open defines no error conditions.  In this implementation,
       copywin, overlay and overwrite return an error if either of the
       window pointers are null, or if some part of the window would be
       placed off-screen.

---

Примечание (Note)

Note that overlay and overwrite may be macros.

---

Портативность (Portability)

The XSI Curses standard, Issue 4 describes these functions
       (adding the const qualifiers).  It further specifies their
       behavior in the presence of characters with multibyte renditions
       (not yet supported in this implementation).

---

Смотри также (See also)

curses(3X), curs_pad(3X), curs_refresh(3X)

---