Demo/tkinter/www/www9.py

   1 #! /usr/local/bin/python
   2
   3 # www9.py -- display the contents of a URL in a Text widget
   4 # - set window title
   5 # - make window resizable
   6 # - update display while reading
   7 # - vertical scroll bar
   8 # - rewritten as class
   9
  10 import sys
  11 import urllib
  12 from Tkinter import *
  13
  14 def main():
  15         if len(sys.argv) != 2 or sys.argv[1][:1] == '-':
  16                 print "Usage:", sys.argv[0], "url"
  17                 sys.exit(2)
  18         url = sys.argv[1]
  19         viewer = Viewer()
  20         viewer.load(url)
  21         viewer.go()
  22
  23 class Viewer:
  24
  25         def __init__(self):
  26                 # Create root window
  27                 self.root = Tk()
  28                 self.root.minsize(1, 1)
  29
  30                 # The Scrollbar *must* be created first
  31                 self.vbar = Scrollbar(self.root)
  32                 self.vbar.pack({'fill': 'y', 'side': 'right'})
  33                 self.text = Text(self.root)
  34                 self.text.pack({'expand': 1, 'fill': 'both', 'side': 'left'})
  35
  36                 # Link Text widget and Scrollbar
  37                 self.text['yscrollcommand'] = (self.vbar, 'set')
  38                 self.vbar['command'] = (self.text, 'yview')
  39
  40         def load(self, url):
  41                 # Load a new URL into the window
  42                 fp = urllib.urlopen(url)
  43
  44                 self.root.title(url)
  45
  46                 self.text.delete('0.0', 'end')
  47
  48                 while 1:
  49                         line = fp.readline()
  50                         if not line: break
  51                         self.text.insert('end', line)
  52                         self.root.update_idletasks()
  53
  54                 fp.close()
  55
  56         def go(self):
  57                 # Start Tk main loop
  58                 self.root.mainloop()
  59
  60 main()