'\" t
.\"***************************************************************************
-.\" Copyright (c) 1998-2000,2002 Free Software Foundation, Inc. *
+.\" Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_attr.3x,v 1.26 2002/09/21 19:50:06 tom Exp $
+.\" $Id: curs_attr.3x,v 1.30 2006/07/15 18:39:05 tom Exp $
.TH curs_attr 3X ""
+.na
+.hy 0
.SH NAME
-\fBattroff\fR, \fBwattroff\fR, \fBattron\fR, \fBwattron\fR,
-\fBattrset\fR, \fBwattrset\fR, \fBcolor_set\fR, \fBwcolor_set\fR,
-\fBstandend\fR, \fBwstandend\fR, \fBstandout\fR, \fBwstandout\fR,
-\fBattr_get\fR, \fBwattr_get\fR,
-\fBattr_off\fR, \fBwattr_off\fR,
-\fBattr_on\fR, \fBwattr_on\fR,
-\fBattr_set\fR, \fBwattr_set\fR,
-\fBchgat\fR, \fBwchgat\fR,
-\fBmvchgat\fR, \fBmvwchgat\fR,
+\fBattroff\fR,
+\fBwattroff\fR,
+\fBattron\fR,
+\fBwattron\fR,
+\fBattrset\fR,
+\fBwattrset\fR,
+\fBcolor_set\fR,
+\fBwcolor_set\fR,
+\fBstandend\fR,
+\fBwstandend\fR,
+\fBstandout\fR,
+\fBwstandout\fR,
+\fBattr_get\fR,
+\fBwattr_get\fR,
+\fBattr_off\fR,
+\fBwattr_off\fR,
+\fBattr_on\fR,
+\fBwattr_on\fR,
+\fBattr_set\fR,
+\fBwattr_set\fR,
+\fBchgat\fR,
+\fBwchgat\fR,
+\fBmvchgat\fR,
+\fBmvwchgat\fR,
\fBPAIR_NUMBER\fR - \fBcurses\fR character and window attribute control routines
+.ad
+.hy
.SH SYNOPSIS
\fB#include <curses.h>\fR
.br
functions, the color argument is a color-pair index (as in the first argument
of \fIinit_pair\fR, see \fBcurs_color\fR(3X)). The \fBopts\fR argument is not
presently used, but is reserved for the future (leave it \fBNULL\fR).
-Note that changing the attributes does not imply
-that a subsequent \fBrefresh\fR will update the screen to match,
-since the character values are not modified.
-Use \fBtouchwin\fR to force the screen to match the updated attributes.
.SS Attributes
The following video attributes, defined in \fB<curses.h>\fR, can be passed to
-the routines \fBattron\fR, \fBattroff\fR, and \fBattrset\fR, or OR'ed with the
+the routines \fBattron\fR, \fBattroff\fR, and \fBattrset\fR, or OR'd with the
characters passed to \fBaddch\fR.
-
+.PP
.TS
center ;
l l .
\fBA_CHARTEXT\fR Bit-mask to extract a character
\fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR Color-pair number \fIn\fR
.TE
-
+.PP
The following macro is the reverse of \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR:
-
+.PP
.br
\fBPAIR_NUMBER(\fR\fIattrs\fR) Returns the pair number associated
with the \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR attribute.
.br
-
+.PP
The return values of many of these routines are not meaningful (they are
implemented as macro-expanded assignments and simply return their argument).
The SVr4 manual page claims (falsely) that these routines always return \fB1\fR.
.SH NOTES
Note that \fBattroff\fR, \fBwattroff\fR, \fBattron\fR, \fBwattron\fR,
\fBattrset\fR, \fBwattrset\fR, \fBstandend\fR and \fBstandout\fR may be macros.
+.PP
+\fBCOLOR_PAIR\fP values can only be OR'd with attributes if the pair
+number is less than 256.
+The alternate functions such as \fBcolor_set\fP can pass a color pair
+value directly.
+However, ncurses ABI 4 and 5 simply OR this value within the alternate functions.
+You must use ncurses ABI 6 to support more than 256 color pairs.
.SH PORTABILITY
-All these functions are supported in the XSI Curses standard, Issue 4. The
+These functions are supported in the XSI Curses standard, Issue 4. The
standard defined the dedicated type for highlights, \fBattr_t\fR, which is not
defined in SVr4 curses. The functions taking \fBattr_t\fR arguments are
not supported under SVr4.
\fBattr_off\fR, \fBattr_set\fR, \fBwattr_on\fR, \fBwattr_off\fR,
\fBwattr_get\fR, \fBwattr_set\fR. These are intended to work with
a new series of highlight macros prefixed with \fBWA_\fR.
-
+.PP
+Older versions of this library did not force an update of the screen
+when changing the attributes.
+Use \fBtouchwin\fR to force the screen to match the updated attributes.
+.PP
.TS
center ;
l l .
\fBWA_BOLD\fR Extra bright or bold
\fBWA_ALTCHARSET\fR Alternate character set
.TE
-
+.PP
The XSI curses standard specifies that each pair of corresponding \fBA_\fR
and \fBWA_\fR-using functions operates on the same current-highlight
information.
The XSI standard extended conformance level adds new highlights
\fBA_HORIZONTAL\fR, \fBA_LEFT\fR, \fBA_LOW\fR, \fBA_RIGHT\fR, \fBA_TOP\fR,
\fBA_VERTICAL\fR (and corresponding \fBWA_\fR macros for each) which this
-curses does not yet support.
+implementation does not yet support.
+.SH RETURN VALUE
+All routines return the integer \fBOK\fR on success, or \fBERR\fP on failure.
+.PP
+X/Open does not define any error conditions.
+.PP
+This implementation returns an error
+if the window pointer is null.
+The \fBwcolor_set\fP function returns an error if the color pair parameter
+is outside the range 0..COLOR_PAIRS-1.
.SH SEE ALSO
\fBcurses\fR(3X),
\fBcurs_addch\fR(3X),
projects / ncurses.git / blobdiff