curs_bkgd(S)

curs_bkgd: bkgdset, wbkgdset, bkgd, wbkgd -- curses window background manipulation routines

Syntax

cc ... -lcurses

#include <curses.h>

void bkgdset(chtype ch);
void wbkgdset(WINDOW *win, chtype ch);
int bkgd(chtype ch);
int wbkgd(WINDOW *win, chtype ch);

Description

The routines bkgdset(S) and wbkgdset(S) manipulate the background of the specified window. Background is a chtype consisting of any combination of attributes and a character.

The attribute part of the background is combined (ORed) with all non-blank characters that are written into the window with waddch(S). Both the character and attribute parts of the background are combined with the blank characters. The background becomes a property of the character and moves with the character through any scrolling and insert/delete line/character operations. To the extent possible on a particular terminal, the attribute part of the background is displayed as the graphic rendition of the character put on the screen.

The routines bkgd(S) and wbkgd(S) combine the new background with every position in the window. Background is any combination of attributes and a character. Only the attribute part is used to set the background of non-blank characters, while both character and attributes are used for blank positions. To the extent possible on a particular terminal, the attribute part of the background is displayed as the graphic rendition of the character put on the screen.

Return values

bkgd( ) and wbkgd( ) return the integer OK, or a non-negative integer, if immedok(S) is set.

Warning

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

The following can be macros: bkgdset( ) and bkgd( ).

Files

/usr/lib/libcurses.a: the library

Standards conformance

bkgdset(S), wbkgdset(S), bkgd(S), and wbkgd(S) are not part of any currently supported standard; they are extensions of AT&T System V developed by The Santa Cruz Operation, Inc. and maintained by The SCO Group.