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NAME | SYNOPSIS | DESCRIPTION | NOTES | RETURN VALUE | SEE ALSO | COLOPHON |
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curs_bkgrnd(3X) curs_bkgrnd(3X)
bkgrnd, wbkgrnd, bkgrndset, wbkgrndset, getbkgrnd, wgetbkgrnd -
curses window complex background manipulation routines
#include <curses.h>
int bkgrnd( const cchar_t *wch);
int wbkgrnd( WINDOW *win, const cchar_t *wch);
void bkgrndset(const cchar_t *wch );
void wbkgrndset(WINDOW *win, const cchar_t *wch);
int getbkgrnd(cchar_t *wch);
int wgetbkgrnd(WINDOW *win, cchar_t *wch);
bkgrndset
The bkgrndset and wbkgrndset routines manipulate the background of
the named window. The window background is a cchar_t consisting of
any combination of attributes (i.e., rendition) and a complex
character. The attribute part of the background is combined (OR'ed)
with all non-blank characters that are written into the window with
waddch. 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.
bkgrnd
The bkgrnd and wbkgrnd functions set the background property of the
current or specified window and then apply this setting to every
character position in that window:
· The rendition of every character on the screen is changed to the
new background rendition.
· Wherever the former background character appears, it is changed
to the new background character.
getbkgrnd
The getbkgrnd function returns the given window's current background
character/attribute pair via the wch pointer. If the given window
pointer is null, the character is not updated (but no error
returned).
Note that bkgrnd, bkgrndset, and getbkgrnd may be macros.
The bkgrndset and wbkgrndset routines do not return a value.
Upon successful completion, the other functions return OK.
Otherwise, they return ERR:
· A null window pointer is treated as an error.
· A null character pointer is treated as an error.
curses(3X), curs_bkgd(3X)
This page is part of the ncurses (new curses) project. Information
about the project can be found at
⟨https://www.gnu.org/software/ncurses/ncurses.html⟩. If you have a
bug report for this manual page, send it to
bug-ncurses-request@gnu.org. This page was obtained from the
project's upstream Git mirror of the CVS repository
⟨git://ncurses.scripts.mit.edu/ncurses.git⟩ on 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-01-30.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
curs_bkgrnd(3X)
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