Demo/curses/tclock.py

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