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      1 #!/usr/bin/env python
      2 #
      3 # $Id$
      4 #
      5 # From tclock.c, Copyright Howard Jones <ha.jones (at] 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 (at] 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