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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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vol_300
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332_01
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boxes.c
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1990-01-06
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120 lines
/****************************************************************/
/* Box() routines of the PCcurses package */
/* */
/****************************************************************/
/* This version of curses is based on ncurses, a curses version */
/* originally written by Pavel Curtis at Cornell University. */
/* I have made substantial changes to make it run on IBM PC's, */
/* and therefore consider myself free to make it public domain. */
/* Bjorn Larsson (bl@infovox.se) */
/****************************************************************/
/* 1.4: References to win->borderchar[] removed due to */
/* re-defined border() functions. Use of short */
/* wherever possible. Portability improvements: 900114 */
/* 1.3: MSC '-W3', Turbo'C' '-w -w-pro' checks. */
/* Support for border(), wborder() functions: 881005 */
/* 1.2: Max limits off by 1. Fixed thanks to S. Creps: 881002 */
/* 1.0: Release: 870515 */
/****************************************************************/
#include <curses.h>
#include <curspriv.h>
char _curses_boxes_rcsid[] = "@(#)boxes.c v.1.4 - 900114";
/****************************************************************/
/* wbox(win,ymin,xmin,ymax,xmax,v,h) draws a box in window */
/* 'win', enclosing the area xmin-xmax and ymin-xmax. If */
/* xmax and/or ymax is 0, the window max value is used. 'v' and */
/* 'h' are the vertical and horizontal characters to use. If */
/* 'v' and 'h' are PC grapics lines, wbox will make the corners */
/* in a pretty way. */
/****************************************************************/
int wbox(win,ymin,xmin,ymax,xmax,v,h)
WINDOW *win;
int ymin;
int xmin;
int ymax;
int xmax;
char v;
char h;
{
static short l, r, t, b, tl, tr, bl,br; /* border chars */
short i;
if (ymax == 0)
ymax = win->_maxy - 1;
if (xmax == 0)
xmax = win->_maxx - 1;
if (ymin >= win->_maxy || ymax > win->_maxy ||
xmin >= win->_maxx || xmax > win->_maxx ||
ymin >= ymax || xmin >= xmax
)
return(ERR);
l = r = v & 0xff; /* get rid of sign-extended int */
t = b = h & 0xff;
tl = tr = bl = br = v; /* default same as vertical */
if (l == 0xba) /* vertical double bars */
{
if (t == 0xcd) /* horizontal too? */
{tl=0xc9;tr=0xbb;bl=0xc8;br=0xbc;}/* use double bar corners */
else
{tl=0xd6;tr=0xb7;bl=0xd3;br=0xbd;}/* use hor-s vert-d corners */
} /* if */
if (l == 0xb3) /* vertical single bars */
{
if (t == 0xcd)
{tl=0xd5;tr=0xb8;bl=0xd4;br=0xbe;}/* horizontal double bars */
else
{tl=0xda;tr=0xbf;bl=0xc0;br=0xd9;}/* use hor-s vert-s bars */
} /* if */
for (i = xmin+1;i <= xmax-1;i++)
{
win->_line[ymin][i] = t | win->_attrs;
win->_line[ymax][i] = b | win->_attrs;
}
for (i = ymin+1;i <= ymax-1;i++)
{
win->_line[i][xmin] = l | win->_attrs;
win->_line[i][xmax] = r | win->_attrs;
}
win->_line[ymin][xmin] = tl | win->_attrs;
win->_line[ymin][xmax] = tr | win->_attrs;
win->_line[ymax][xmin] = bl | win->_attrs;
win->_line[ymax][xmax] = br | win->_attrs;
for (i=ymin; i <= ymax ; i++)
{
if (win->_minchng[i] == _NO_CHANGE)
{
win->_minchng[i] = xmin;
win->_maxchng[i] = xmax;
} /* if */
else
{
win->_minchng[i] = min(win->_minchng[i], xmin);
win->_maxchng[i] = max(win->_maxchng[i], xmax);
} /* else */
} /* for */
return(OK);
} /* box */
/****************************************************************/
/* box(win,v,h) draws a box around window window 'win'. 'v' and */
/* 'h' are the vertical and horizontal characters to use. */
/****************************************************************/
void box(win,v,h)
WINDOW *win;
char v;
char h;
{
wbox(win,0,0,0,0,v,h);
} /* box */