horizscroll.py

   1 #!/usr/bin/env python
   2
   3 import string
   4 import sys
   5 import time
   6
   7 class HorizScroll:
   8         def __init__(self, text):
   9                 self.text = text
  10                 pass
  11
  12         def expand(self, padding=None, paddingchar=" ", dir=None):
  13                 if len(self.text) <= 10:
  14                         return [text]
  15
  16                 if not padding:
  17                         padding = len(self.text) / 2
  18
  19                 format = "%-" + str(padding) + "." + str(padding) + "s"
  20                 pad = string.replace(format % " "," ",paddingchar)
  21                 padtext = self.text + pad
  22                 expansion = []
  23
  24                 for x in range(0,len(padtext)):
  25                           expansion.append(padtext[x:] + padtext[:x])
  26
  27                 if dir == -1:
  28                         expansion.reverse()
  29
  30                 return expansion
  31
  32 if __name__ == '__main__':
  33         h = HorizScroll("hello cruel world")
  34         eh = h.expand()
  35         while 1:
  36                 for x in eh:
  37                         sys.stdout.write("\r")
  38                         print "%-10.10s" % x,
  39                         sys.stdout.flush()
  40                         time.sleep(0.1)
  41