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))),
  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)