/* 文件名:tclock.c */

#include "test.priv.h"

#include <math.h>
#include <time.h>

/* To compile: cc -o tclock tclock.c -lcurses -lm */

#ifndef PI
#define PI 3.141592654
#endif

#define sign(_x) (_x<0?-1:1)

#define ASPECT 2.2
#define ROUND(value) ((int)((value) + 0.5))

#define A2X(angle,radius) ROUND(ASPECT * radius * sin(angle))
#define A2Y(angle,radius) ROUND(radius * cos(angle))

/* Plot a point */
static void
plot(int x, int y, char col)
{
mvaddch(y, x, (chtype) col);
}

/* Draw a diagonal(arbitrary) line using Bresenham's alogrithm. */
static void
dline(int pair, int from_x, int from_y, int x2, int y2, char ch)
{
int dx, dy;
int ax, ay;
int sx, sy;
int x, y;
int d;

if (has_colors())
attrset(COLOR_PAIR(pair));

dx = x2 - from_x;
dy = y2 - from_y;

ax = abs(dx * 2);
ay = abs(dy * 2);

sx = sign(dx);
sy = sign(dy);

x = from_x;
y = from_y;

if (ax > ay) {
d = ay - (ax / 2);

while (1) {
plot(x, y, ch);
if (x == x2)
return;

if (d >= 0) {
y += sy;
d -= ax;
}
x += sx;
d += ay;
}
} else {
d = ax - (ay / 2);

while (1) {
plot(x, y, ch);
if (y == y2)
return;

if (d >= 0) {
x += sx;
d -= ay;
}
y += sy;
d += ax;
}
}
}

int
main(
int argc GCC_UNUSED,
char *argv[]GCC_UNUSED)
{
int i, cx, cy;
double mradius, hradius, mangle, hangle;
double sangle, sradius, hours;
int hdx, hdy;
int mdx, mdy;
int sdx, sdy;
int ch;
int lastbeep = -1;
time_t tim;
struct tm *t;
char szChar[10];
int my_bg = COLOR_BLACK;

initscr();
noecho();
cbreak();
nodelay(stdscr, TRUE);
curs_set(0);

if (has_colors()) {
start_color();
#if HAVE_USE_DEFAULT_COLORS
if (use_default_colors() == OK)
my_bg = -1;
#endif
init_pair(1, COLOR_RED, my_bg);
init_pair(2, COLOR_MAGENTA, my_bg);
init_pair(3, COLOR_GREEN, my_bg);
}
#ifdef KEY_RESIZE
keypad(stdscr, TRUE);
restart:
#endif
cx = (COLS - 1) / 2;/* 39 */
cy = LINES / 2;/* 12 */
ch = (cx > cy) ? cy : cx;/* usually cy */
mradius = (3 * cy) / 4;/* 9 */
hradius = cy / 2;/* 6 */
sradius = (2 * cy) / 3;/* 8 */

for (i = 0; i < 12; i++) {
sangle = (i + 1) * (2.0 * PI) / 12.0;
sradius = (5 * cy) / 6;/* 10 */
sdx = A2X(sangle, sradius);
sdy = A2Y(sangle, sradius);
sprintf(szChar, "%d", i + 1);

mvaddstr(cy - sdy, cx + sdx, szChar);
}

mvaddstr(0, 25, "SCO OpenServer 5下的字符时钟");

sradius = 8;
for (;;) {
napms(1000);

tim = time(0);
t = localtime(&tim);

hours = (t->tm_hour + (t->tm_min / 60.0));
if (hours > 12.0)
hours -= 12.0;

mangle = ((t->tm_min) * (2 * PI) / 60.0);
mdx = A2X(mangle, mradius);
mdy = A2Y(mangle, mradius);

hangle = ((hours) * (2.0 * PI) / 12.0);
hdx = A2X(hangle, hradius);
hdy = A2Y(hangle, hradius);

sangle = ((t->tm_sec) * (2.0 * PI) / 60.0);
sdx = A2X(sangle, sradius);
sdy = A2Y(sangle, sradius);

dline(3, cx, cy, cx + mdx, cy - mdy, '#');

attrset(A_REVERSE);
dline(2, cx, cy, cx + hdx, cy - hdy, '.');
attroff(A_REVERSE);

if (has_colors())
attrset(COLOR_PAIR(1));

plot(cx + sdx, cy - sdy, 'O');

if (has_colors())
attrset(COLOR_PAIR(0));

mvaddstr(LINES - 2, 0, ctime(&tim));
refresh();
if ((t->tm_sec % 5) == 0
&& t->tm_sec != lastbeep) {
lastbeep = t->tm_sec;
beep();
}

if ((ch = getch()) != ERR) {
#ifdef KEY_RESIZE
if (ch == KEY_RESIZE) {
erase();
goto restart;
}
#endif
break;
}

plot(cx + sdx, cy - sdy, ' ');
dline(0, cx, cy, cx + hdx, cy - hdy, ' ');
dline(0, cx, cy, cx + mdx, cy - mdy, ' ');

}

curs_set(1);
endwin();
return 0;
}

--------------------------------------------------------------------------------
/* 头文件 test.priv.h */

/****************************************************************************
* Copyright (c) 1998,2000 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 *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/

/****************************************************************************
* Author: Thomas E. Dickey <dickey@clark.net> 1996 *
****************************************************************************/
/* $Id: test.priv.h,v 1.19 2000/09/02 19:31:58 tom Exp $ */

#if HAVE_CONFIG_H
#include <ncurses_cfg.h>
#else
#define HAVE_CURSES_VERSION 0
#define HAVE_RESIZETERM 0
#define HAVE_USE_DEFAULT_COLORS 0
#define HAVE_WRESIZE 0
#endif

#ifndef HAVE_NC_ALLOC_H
#define HAVE_NC_ALLOC_H 0
#endif

#ifndef HAVE_LOCALE_H
#define HAVE_LOCALE_H 0
#endif

#ifndef NCURSES_NOMACROS
#define NCURSES_NOMACROS 0
#endif

#ifndef NEED_PTEM_H
#define NEED_PTEM_H 0
#endif

#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <curses.h>

#if NCURSES_NOMACROS
#include <nomacros.h>
#endif

#if HAVE_GETOPT_H
#include <getopt.h>
#else
/* 'getopt()' may be prototyped in <stdlib.h>, but declaring its variables
* doesn't hurt.
*/
extern char *optarg;
extern int optind;
#endif /* HAVE_GETOPT_H */

#ifndef GCC_NORETURN
#define GCC_NORETURN /* nothing */
#endif
#ifndef GCC_UNUSED
#define GCC_UNUSED /* nothing */
#endif

#define SIZEOF(table)(sizeof(table)/sizeof(table[0]))

#if defined(NCURSES_VERSION) && HAVE_NC_ALLOC_H
#include <nc_alloc.h>
#else
#define typeMalloc(type,n) (type *) malloc(n * sizeof(type))
#define typeRealloc(type,n,p) (type *) realloc(p, n * sizeof(type))
#endif

#ifndef ExitProgram
#define ExitProgram(code) return code
#endif

#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif

/* Use this to quiet gcc's -Wwrite-strings warnings, but accommodate SVr4
* curses which doesn't have const parameters declared (so far) in the places
* that XSI shows.
*/
#ifndef NCURSES_CONST
#define NCURSES_CONST /* nothing */
#endif