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Document line drawing and graphics characters.

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jdc 2007-07-11 18:45:40 +00:00
parent 65f3606f46
commit f0b4a51625
1 changed files with 66 additions and 2 deletions
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68
lib/libcurses/curses_addch.3
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@ -1,4 +1,4 @@
.\" $NetBSD: curses_addch.3,v 1.5 2003/05/21 21:22:15 jdc Exp $
.\" $NetBSD: curses_addch.3,v 1.6 2007/07/11 18:45:40 jdc Exp $
.\"
.\" Copyright (c) 2002
.\" Brett Lymn (blymn@NetBSD.org, brett_lymn@yahoo.com.au)
@ -30,7 +30,7 @@
.\" SUCH DAMAGE.
.\"
.\"
.Dd May 21, 2003
.Dd Jun 11, 2007
.Dt CURSES_ADDCH 3
.Os
.Sh NAME
@ -90,6 +90,70 @@ is called to move the cursor to the position specified by
.Fa y ,
.Fa x
before the character is added to the window.
.Sh LINE DRAWING CHARACTERS
Some terminals support the display of line drawing and graphics characters.
These characters can be added using their defined names, as shown in the
table below.
Where the terminal does not support a specific character, the default
(non-graphics) character is displayed instead.
.Bl -column -offset indent ".Sy System V Name" ".Sy Default"
.It Sy "Name" Ta Sy "Default" Ta Sy "Description"
.It ACS_RARROW Ta > Ta "Arrow pointing right"
.It ACS_LARROW Ta < Ta "Arrow pointing left"
.It ACS_UARROW Ta ^ Ta "Arrow pointing up"
.It ACS_DARROW Ta v Ta "Arrow pointing down"
.It ACS_BLOCK Ta # Ta "Solid square block"
.It ACS_DIAMOND Ta + Ta "Diamond"
.It ACS_CKBOARD Ta : Ta "Checker board (stipple)"
.It ACS_DEGREE Ta ' Ta "Degree symbol"
.It ACS_PLMINUS Ta # Ta "Plus/minus"
.It ACS_BOARD Ta # Ta "Board of squares"
.It ACS_LANTERN Ta # Ta "Lantern symbol"
.It ACS_LRCORNER Ta + Ta "Lower right-hand corner"
.It ACS_URCORNER Ta + Ta "Upper right-hand corner"
.It ACS_ULCORNER Ta + Ta "Upper left-hand corner"
.It ACS_LLCORNER Ta + Ta "Lower left-hand corner"
.It ACS_PLUS Ta + Ta "Plus"
.It ACS_HLINE Ta - Ta "Horizontal line"
.It ACS_S1 Ta - Ta "Scan line 1"
.It ACS_S9 Ta - Ta "Scan line 9"
.It ACS_LTEE Ta + Ta "Left tee"
.It ACS_RTEE Ta + Ta "Right tee"
.It ACS_BTEE Ta + Ta "Bottom tee"
.It ACS_TTEE Ta + Ta "Top tee"
.It ACS_VLINE Ta | Ta "Vertical line"
.It ACS_BULLET Ta o Ta "Bullet"
.El
.Pp
The following additional characters are also supported.
.Bl -column -offset indent ".Sy System V Name" ".Sy Default"
.It Sy "Name" Ta Sy "Default" Ta Sy "Description"
.It ACS_S3 Ta - Ta "Scan line 3"
.It ACS_S7 Ta - Ta "Scan line 7"
.It ACS_LEQUAL Ta < Ta "Less than or equal to"
.It ACS_GEQUAL Ta > Ta "Greater than or equal to"
.It ACS_PI Ta * Ta "Pi symbol"
.It ACS_NEQUAL Ta ! Ta "Not equal to"
.It ACS_STERLING Ta f Ta "Sterling symbol"
.El
.Pp
For compatibility with some
.Em System V
implementations, the following definitions are also supported.
.Bl -column -offset indent ".Sy System V Name" ".Sy Default"
.It Sy "System V Name" Ta Sy "NetBSD Curses Name"
.It ACS_SBBS Ta ACS_LRCORNER
.It ACS_BBSS Ta ACS_URCORNER
.It ACS_BSSB Ta ACS_ULCORNER
.It ACS_SSBB Ta ACS_LLCORNER
.It ACS_SSSS Ta ACS_PLUS
.It ACS_BSBS Ta ACS_HLINE
.It ACS_SSSB Ta ACS_LTEE
.It ACS_SBSS Ta ACS_RTEE
.It ACS_SSBS Ta ACS_BTEE
.It ACS_BSSS Ta ACS_TTEE
.It ACS_SBSB Ta ACS_VLINE
.El
.Sh RETURN VALUES
Functions returning pointers will return
.Dv NULL