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overlay(3ncurses) [bsd man page]

overlay(3NCURSES)														 overlay(3NCURSES)

NAME
overlay, overwrite, copywin - overlay and manipulate overlapped curses windows 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); DESCRIPTION
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. The copywin routine provides a finer granularity of control over the overlay and overwrite routines. Like in the prefresh routine, a rec- tangle 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. 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 point- ers are null, or if some part of the window would be placed off-screen. NOTES
Note that overlay and overwrite may be macros. PORTABILITY
The XSI Curses standard, Issue 4 describes these functions (adding the const qualifiers). It further specifies their behavior in the pres- ence of characters with multibyte renditions (not yet supported in this implementation). SEE ALSO
ncurses(3NCURSES), pad(3NCURSES), refresh(3NCURSES) overlay(3NCURSES)

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overlay(3NCURSES)														 overlay(3NCURSES)

NAME
overlay, overwrite, copywin - overlay and manipulate overlapped curses windows 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); DESCRIPTION
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. The copywin routine provides a finer granularity of control over the overlay and overwrite routines. Like in the prefresh routine, a rec- tangle 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. 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 point- ers are null, or if some part of the window would be placed off-screen. NOTES
Note that overlay and overwrite may be macros. PORTABILITY
The XSI Curses standard, Issue 4 describes these functions (adding the const qualifiers). It further specifies their behavior in the pres- ence of characters with multibyte renditions (not yet supported in this implementation). SEE ALSO
ncurses(3NCURSES), pad(3NCURSES), refresh(3NCURSES) overlay(3NCURSES)

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