| Guido van Rossum | dfa70a9 | 1995-01-10 17:05:37 +0000 | [diff] [blame^] | 1 | #! /usr/local/bin/python |
| 2 | |
| 3 | # www10.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 | # - editable url entry and reload button |
| 10 | |
| 11 | import sys |
| 12 | import urllib |
| 13 | from Tkinter import * |
| 14 | |
| 15 | def main(): |
| 16 | if len(sys.argv) != 2 or sys.argv[1][:1] == '-': |
| 17 | print "Usage:", sys.argv[0], "url" |
| 18 | sys.exit(2) |
| 19 | url = sys.argv[1] |
| 20 | viewer = Viewer() |
| 21 | viewer.load(url) |
| 22 | viewer.go() |
| 23 | |
| 24 | class Viewer: |
| 25 | |
| 26 | def __init__(self): |
| 27 | # Create root window |
| 28 | self.root = Tk() |
| 29 | self.root.minsize(1, 1) |
| 30 | |
| 31 | # Create topframe for the entry and button |
| 32 | self.topframe = Frame(self.root) |
| 33 | self.topframe.pack({'fill': 'x', 'side': 'top'}) |
| 34 | |
| 35 | # Create a label in front of the entry |
| 36 | self.urllabel = Label(self.topframe, {'text': 'URL:'}) |
| 37 | self.urllabel.pack({'side': 'left'}) |
| 38 | |
| 39 | # Create the entry containing the URL |
| 40 | self.entry = Entry(self.topframe, {'relief': 'sunken'}) |
| 41 | self.entry.pack({'side': 'left', 'fill': 'x', 'expand': 1}) |
| 42 | self.entry.bind('<Return>', self.loadit) |
| 43 | |
| 44 | # Create the button |
| 45 | self.reload = Button(self.topframe, |
| 46 | {'text': 'Reload', |
| 47 | 'command': self.reload}) |
| 48 | self.reload.pack({'side': 'right'}) |
| 49 | |
| 50 | # Create botframe for the text and scrollbar |
| 51 | self.botframe = Frame(self.root) |
| 52 | self.botframe.pack({'fill': 'both', 'expand': 1}) |
| 53 | |
| 54 | # The Scrollbar *must* be created first |
| 55 | self.vbar = Scrollbar(self.botframe) |
| 56 | self.vbar.pack({'fill': 'y', 'side': 'right'}) |
| 57 | self.text = Text(self.botframe) |
| 58 | self.text.pack({'expand': 1, 'fill': 'both', 'side': 'left'}) |
| 59 | |
| 60 | # Link Text widget and Scrollbar |
| 61 | self.text['yscrollcommand'] = (self.vbar, 'set') |
| 62 | self.vbar['command'] = (self.text, 'yview') |
| 63 | |
| 64 | self.url = None |
| 65 | |
| 66 | def load(self, url): |
| 67 | # Load a new URL into the window |
| 68 | fp = urllib.urlopen(url) |
| 69 | |
| 70 | self.url = url |
| 71 | |
| 72 | self.root.title(url) |
| 73 | |
| 74 | self.entry.delete('0', 'end') |
| 75 | self.entry.insert('end', url) |
| 76 | |
| 77 | self.text.delete('1.0', 'end') |
| 78 | |
| 79 | while 1: |
| 80 | line = fp.readline() |
| 81 | if not line: break |
| 82 | if line[-2:] == '\r\n': line = line[:-2] + '\n' |
| 83 | self.text.insert('end', line) |
| 84 | self.root.update_idletasks() |
| 85 | |
| 86 | fp.close() |
| 87 | |
| 88 | def go(self): |
| 89 | # Start Tk main loop |
| 90 | self.root.mainloop() |
| 91 | |
| 92 | def reload(self, *args): |
| 93 | # Callback for Reload button |
| 94 | if self.url: |
| 95 | self.load(self.url) |
| 96 | |
| 97 | def loadit(self, *args): |
| 98 | # Callback for <Return> event in entry |
| 99 | self.load(self.entry.get()) |
| 100 | |
| 101 | main() |