.\" $Id: cdk_draw.3,v 1.4 2009/02/15 17:10:04 tom Exp $
.de XX
..
.TH cdk_draw 3
.XX boxWindow
.XX attrbox
.XX drawObjBox
.XX drawLine
.XX drawShadow
.XX writeBlanks
.XX writeChar
.XX writeCharAttrib
.XX writeChtype
.XX writeChtypeAttrib
.SH NAME
cdk_draw \- Cdk Drawing Functions
.SH SYNOPSIS
.LP
.B cc
.RI "[ " "flag" " \|.\|.\|. ] " "file" " \|.\|.\|."
.B \-lcdk
.RI "[ " "library" " \|.\|.\|. ]"
.LP
#include <cdk.h>
.nf
.TP 15
.B "void boxWindow ("
.BI "WINDOW *" "window",
.BI "chtype " "attr");
.TP 15
.B "void attrbox ("
.BI "WINDOW *" "win",
.BI "chtype " "tlc",
.BI "chtype " "trc",
.BI "chtype " "blc",
.BI "chtype " "brc",
.BI "chtype " "horz",
.BI "chtype " "vert",
.BI "chtype " "attr");
.TP 15
.B "void drawObjBox ("
.BI "WINDOW *" "win",
.BI "CDKOBJS *" "object");
.TP 15
.B "void drawLine ("
.BI "WINDOW *" "window",
.BI "int " "startx",
.BI "int " "starty",
.BI "int " "endx",
.BI "int " "endy",
.BI "chtype " "line");
.TP 15
.B "void drawShadow ("
.BI "WINDOW *" "shadowWin");
.TP 15
.B "void writeBlanks ("
.BI "WINDOW *" "window",
.BI "int " "xpos",
.BI "int " "ypos",
.BI "int " "align",
.BI "int " "start",
.BI "int " "end");
.TP 15
.B "void writeChar ("
.BI "WINDOW *" "window",
.BI "int " "xpos",
.BI "int " "ypos",
.BI "char *" "string",
.BI "int " "align",
.BI "int " "start",
.BI "int " "end");
.TP 15
.B "void writeCharAttrib ("
.BI "WINDOW *" "window",
.BI "int " "xpos",
.BI "int " "ypos",
.BI "char *" "string",
.BI "chtype " "attr",
.BI "int " "align",
.BI "int " "start",
.BI "int " "end");
.TP 15
.B "void writeChtype ("
.BI "WINDOW *" "window",
.BI "int " "xpos",
.BI "int " "ypos",
.BI "chtype *" "string",
.BI "int " "align",
.BI "int " "start",
.BI "int " "end");
.TP 15
.B "void writeChtypeAttrib ("
.BI "WINDOW *" "window",
.BI "int " "xpos",
.BI "int " "ypos",
.BI "chtype *" "string",
.BI "chtype " "attr",
.BI "int " "align",
.BI "int " "start",
.BI "int " "end");
.fi
.SH DESCRIPTION
These functions perform useful drawing and attribute operations.
.SH AVAILABLE FUNCTIONS
.TP 5
.B boxWindow
draw a box with on the window \fIwin\fP.
Like \fBattrbox\fP, 
this function ORs \fIattr\fP with each character as it draws the box.
.TP 5
.B attrbox
draw a box with on the window \fIwin\fP
letting the caller define each element of the box.
.IP
The parameters \fItlc\fP, \fItrc\fP, \fIblc\fP, \fIbrc\fP
are used for the
top-left,
top-right,
bottom-left and
bottom-right corners respectively.
The parameters
\fIhorz\fP and
\fIvert\fP
are used for the horizontal and vertical sides of the box.
Any of these parameters may be zero.
In that case, the function skips the corresponding element of the box.
.IP
The function ORs \fIattr\fP with each character as it draws the box.
.TP 5
.B drawObjBox
Draw a box around the given window \fIwin\fP
using the \fIobject\fP's defined line-drawing characters.
.TP 5
.B drawLine
draw a line on the given window.
.IP
The parameters \fIstarty\fP, \fIstartx\fP are the starting coordinates.
The parameters \fIendy\fP, \fIendx\fP are the ending coordinates.
The function writes the data in \fIline\fP to each coordinate in that
range including the start/end coordinates.
.IP
The function handles lines other than vertical or horizontal,
but normally it is used for that, e.g., with \fIline\fP set to
\fBACS_HLINE\fP or \fBACS_VLINE\fP.
.TP 5
.B drawShadow
draw a shadow on the right and bottom edges of a window.
.TP 5
.B writeBlanks
write a string of blanks, using \fBwriteChar\fP.
The parameters are passed to \fBwriteChar\fP as is.
There is no corresponding \fBwriteBlanksAttrib\fP function.
.TP 5
.B writeChar
writes out a \fBchar\ *\fP string without adding attributes.
The parameters are passed to \fBwriteCharAttrib\fP as is.
.TP 5
.B writeCharAttrib
writes out a \fBchar\ *\fP string with the given attributes added.
The string is written to the given \fIwindow\fP,
using its relative screen coordinates \fIypos\fP and \fIxpos\fP.
.IP
Compare with \fBwriteChtypeAttrib\fP, which writes a \fBchtype\ *\fP string.
.IP
The function ORs the attribute \fIattr\fP with each item from the string.
For instance, it may be \fBA_BOLD\fP.
The \fIalign\fP parameter controls whether it is written horizontally
(\fBHORIZONTAL\fP) or vertically (\fBVERTICAL\fP).
.IP
Finally, only a subset of the string is written.
The function starts with the data from the \fIstart\fP item of
\fIstring\fP, and ends before the \fIend\fP item.
If \fIstart\fP is greater than, or equal to \fIend\fP, no data is written.
.TP 5
.B writeChtype
writes out a \fBchtype\ *\fP string without adding attributes.
The parameters are passed to \fBwriteChtypeAttrib\fP as is.
.TP 5
.B writeChtypeAttrib
writes out a \fIchtype\ *\fP string with the given attributes added.
The string is written to the given \fIwindow\fP,
using its relative screen coordinates \fIypos\fP and \fIxpos\fP.
You would normally construct the string from a \fIchar\ *\fP string
using \fBchar2Chtype\fP (3).
.IP
The function ORs the attribute \fIattr\fP with each item from the string.
For instance, it may be \fBA_BOLD\fP.
The \fIalign\fP parameter controls whether it is written horizontally
(\fBHORIZONTAL\fP) or vertically (\fBVERTICAL\fP).
.IP
Finally, only a subset of the string is written.
The function starts with the data from the \fIstart\fP item of
\fIstring\fP, and ends before the \fIend\fP item.
If \fIstart\fP is greater than, or equal to \fIend\fP, no data is written.
.
.SH SEE ALSO
.BR cdk (3),
.BR cdk_util (3)