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#!/usr/bin/env ruby
# $Id: tclock.rb,v 1.6 2002-02-28 13:50:10 t-peters Exp $
# tclock - analog/digital clock for curses, translated to ruby
# Copyright (C) 2002 Tobias Peters <t-peters@users.berlios.de>
# This file was adapted from the C program tclock.c from the ncurses
# distribution, which bears the following copyright statement:
# tclock - analog/digital clock for curses.
# If it gives you joy, then
# (a) I'm glad
# (b) you need to get out more :-)
#
# This program is copyright Howard Jones, September 1994
# (ha.jones@ic.ac.uk). It may be freely distributed as
# long as this copyright message remains intact, and any
# modifications are clearly marked as such. [In fact, if
# you modify it, I wouldn't mind the modifications back,
# especially if they add any nice features. A good one
# would be a precalc table for the 60 hand positions, so
# that the floating point stuff can be ditched. As I said,
# it was a 20 hackup minute job.]
#
# COMING SOON: tfishtank. Be the envy of your mac-owning
# colleagues.
###########################################################################
# The translation of this program to ruby is a modification and is hereby #
# clearly marked as such. #
###########################################################################
require "ncursesw"
PI = Math::PI
def sign(_x)
(_x<0?-1:1)
end
ASPECT = 2.2
def a2x(angle,radius)
(ASPECT * radius * Math::sin(angle)).round
end
def a2y(angle,radius)
(radius * Math::cos(angle)).round
end
# Plot a point
def plot(x, y, c)
Ncurses.mvaddch(y, x, c.ord)
end
# Draw a diagonal(arbitrary) line using Bresenham's alogrithm.
def dline(pair, from_x, from_y, x2, y2, ch)
if (Ncurses.has_colors?)
Ncurses.attrset(Ncurses.COLOR_PAIR(pair))
end
dx = x2 - from_x;
dy = y2 - from_y;
ax = (dx * 2).abs
ay = (dy * 2).abs
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 nil
end
if (d >= 0)
y += sy;
d -= ax;
end
x += sx;
d += ay;
end
else
d = ax - (ay / 2);
while (1)
plot(x, y, ch);
if (y == y2)
return nil;
end
if (d >= 0)
x += sx;
d -= ay;
end
y += sy;
d += ax;
end
end
end
begin
# int i, cx, cy;
# double mradius, hradius, mangle, hangle;
# double sangle, sradius, hours;
# int hdx, hdy;
# int mdx, mdy;
# int sdx, sdy;
# int ch;
lastbeep = -1;
my_bg = Ncurses::COLOR_BLACK;
Ncurses::initscr();
Ncurses::noecho();
Ncurses::cbreak();
Ncurses::nodelay(Ncurses::stdscr, TRUE);
Ncurses::curs_set(0);
if (Ncurses::has_colors?())
Ncurses::start_color();
Ncurses::init_pair(1, Ncurses::COLOR_RED, my_bg);
Ncurses::init_pair(2, Ncurses::COLOR_MAGENTA, my_bg);
Ncurses::init_pair(3, Ncurses::COLOR_GREEN, my_bg);
end
Ncurses::keypad(Ncurses::stdscr, TRUE);
while (:restart)
cx = (Ncurses.COLS - 1) / 2; #/* 39 */
cy = Ncurses.LINES / 2; #/* 12 */
ch = (cx > cy) ? cy : cx; #/* usually cy */
mradius = ((3 * cy) / 4).to_f; #/* 9 */
hradius = (cy / 2).to_f; #/* 6 */
sradius = ((2 * cy) / 3).to_f; #/* 8 */
for i in (0...12)
sangle = (i + 1) * (2.0 * PI) / 12.0;
sradius = ((5 * cy) / 6).to_f; #/* 10 */
sdx = a2x(sangle, sradius);
sdy = a2y(sangle, sradius);
szChar = sprintf("%d", i + 1);
Ncurses::mvaddstr(cy - sdy, cx + sdx, szChar);
end
Ncurses::mvaddstr(0, 0,
"ASCII Clock by Howard Jones (ha.jones@ic.ac.uk),1994");
sradius -=2
sradius = 1 if sradius < 1
window_size_changed = false
while (window_size_changed == false)
sleep(0.100);
hours = Time.now.hour + Time.now.min / 60.0;
if (hours > 12.0)
hours -= 12.0;
end
mangle = Time.now.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 = ((Time.now.sec) * (2.0 * PI) / 60.0);
sdx = a2x(sangle, sradius);
sdy = a2y(sangle, sradius);
dline(3, cx, cy, cx + mdx, cy - mdy, '#');
Ncurses::attrset(Ncurses::A_REVERSE);
dline(2, cx, cy, cx + hdx, cy - hdy, '.');
Ncurses::attroff(Ncurses::A_REVERSE);
if (Ncurses::has_colors?())
Ncurses::attrset(Ncurses::COLOR_PAIR(1));
end
plot(cx + sdx, cy - sdy, 'O');
if (Ncurses::has_colors?())
Ncurses::attrset(Ncurses::COLOR_PAIR(0));
end
Ncurses::mvaddstr(Ncurses.LINES - 2, 0, Time.now.to_s);
Ncurses::refresh();
if ((Time.now.sec % 5) == 0 &&
Time.now.sec != lastbeep)
lastbeep = Time.now.sec;
Ncurses::beep();
end
if ((ch = Ncurses::getch()) != Ncurses::ERR)
if (ch == Ncurses::KEY_RESIZE)
Ncurses::erase();
window_size_changed = true;
else
break;
end
end
plot(cx + sdx, cy - sdy, ' ');
dline(0, cx, cy, cx + hdx, cy - hdy, ' ');
dline(0, cx, cy, cx + mdx, cy - mdy, ' ');
end
if ! window_size_changed
$stderr.puts "! window_size_changed"
break
end
end
ensure
Ncurses::curs_set(1);
Ncurses::endwin();
end
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