1 #!/usr/bin/env python
2 #
3 # $Id$
4 #
5 # From tclock.c, Copyright Howard Jones <ha.jones@ic.ac.uk>, September 1994.
6 
7 from math import *
8 import curses, time
9 
10 ASPECT = 2.2
11 
12 def sign(_x):
13     if _x < 0: return -1
14     return 1
15 
16 def A2XY(angle, radius):
17     return (int(round(ASPECT * radius * sin(angle))),
18             int(round(radius * cos(angle))))
19 
20 def plot(x, y, col):
21     stdscr.addch(y, x, col)
22 
23 # draw a diagonal line using Bresenham's algorithm
24 def dline(pair, from_x, from_y, x2, y2, ch):
25     if curses.has_colors():
26         stdscr.attrset(curses.color_pair(pair))
27 
28     dx = x2 - from_x
29     dy = y2 - from_y
30 
31     ax = abs(dx * 2)
32     ay = abs(dy * 2)
33 
34     sx = sign(dx)
35     sy = sign(dy)
36 
37     x = from_x
38     y = from_y
39 
40     if ax > ay:
41         d = ay - ax // 2
42 
43         while True:
44             plot(x, y, ch)
45             if x == x2:
46                 return
47 
48             if d >= 0:
49                 y += sy
50                 d -= ax
51             x += sx
52             d += ay
53     else:
54         d = ax - ay // 2
55 
56         while True:
57             plot(x, y, ch)
58             if y == y2:
59                 return
60 
61             if d >= 0:
62                 x += sx
63                 d -= ay
64             y += sy
65             d += ax
66 
67 def main(win):
68     global stdscr
69     stdscr = win
70 
71     lastbeep = -1
72     my_bg = curses.COLOR_BLACK
73 
74     stdscr.nodelay(1)
75     stdscr.timeout(0)
76 #    curses.curs_set(0)
77     if curses.has_colors():
78         curses.init_pair(1, curses.COLOR_RED, my_bg)
79         curses.init_pair(2, curses.COLOR_MAGENTA, my_bg)
80         curses.init_pair(3, curses.COLOR_GREEN, my_bg)
81 
82     cx = (curses.COLS - 1) // 2
83     cy = curses.LINES // 2
84     ch = min( cy-1, int(cx // ASPECT) - 1)
85     mradius = (3 * ch) // 4
86     hradius = ch // 2
87     sradius = 5 * ch // 6
88 
89     for i in range(0, 12):
90         sangle = (i + 1) * 2.0 * pi / 12.0
91         sdx, sdy = A2XY(sangle, sradius)
92 
93         stdscr.addstr(cy - sdy, cx + sdx, "%d" % (i + 1))
94 
95     stdscr.addstr(0, 0,
96                   "ASCII Clock by Howard Jones <ha.jones@ic.ac.uk>, 1994")
97 
98     sradius = max(sradius-4, 8)
99 
100     while True:
101         curses.napms(1000)
102 
103         tim = time.time()
104         t = time.localtime(tim)
105 
106         hours = t[3] + t[4] / 60.0
107         if hours > 12.0:
108             hours -= 12.0
109 
110         mangle = t[4] * 2 * pi / 60.0
111         mdx, mdy = A2XY(mangle, mradius)
112 
113         hangle = hours * 2 * pi / 12.0
114         hdx, hdy = A2XY(hangle, hradius)
115 
116         sangle = t[5] * 2 * pi / 60.0
117         sdx, sdy = A2XY(sangle, sradius)
118 
119         dline(3, cx, cy, cx + mdx, cy - mdy, ord('#'))
120 
121         stdscr.attrset(curses.A_REVERSE)
122         dline(2, cx, cy, cx + hdx, cy - hdy, ord('.'))
123         stdscr.attroff(curses.A_REVERSE)
124 
125         if curses.has_colors():
126             stdscr.attrset(curses.color_pair(1))
127 
128         plot(cx + sdx, cy - sdy, ord('O'))
129 
130         if curses.has_colors():
131             stdscr.attrset(curses.color_pair(0))
132 
133         stdscr.addstr(curses.LINES - 2, 0, time.ctime(tim))
134         stdscr.refresh()
135         if (t[5] % 5) == 0 and t[5] != lastbeep:
136             lastbeep = t[5]
137             curses.beep()
138 
139         ch = stdscr.getch()
140         if ch == ord('q'):
141             return 0
142 
143         plot(cx + sdx, cy - sdy, ord(' '))
144         dline(0, cx, cy, cx + hdx, cy - hdy, ord(' '))
145         dline(0, cx, cy, cx + mdx, cy - mdy, ord(' '))
146 
147 curses.wrapper(main)
148