initial checkin of www Tk examples
diff --git a/Demo/tkinter/www/www12.py b/Demo/tkinter/www/www12.py
new file mode 100755
index 0000000..2e870c4
--- /dev/null
+++ b/Demo/tkinter/www/www12.py
@@ -0,0 +1,210 @@
+#! /usr/local/bin/python
+
+# www12.py -- display the contents of a URL in a Text widget
+# - set window title
+# - make window resizable
+# - update display while reading
+# - vertical scroll bar
+# - rewritten as class
+# - editable url entry and reload button
+# - error dialog
+# - menu bar; added 'master' option to constructor
+
+import sys
+import urllib
+from Tkinter import *
+import Dialog
+
+def main():
+ if len(sys.argv) != 2 or sys.argv[1][:1] == '-':
+ print "Usage:", sys.argv[0], "url"
+ sys.exit(2)
+ url = sys.argv[1]
+ tk = Tk()
+ tk.withdraw()
+ viewer = Viewer(tk)
+ viewer.load(url)
+ viewer.go()
+
+class Viewer:
+
+ def __init__(self, master = None):
+ # Create root window
+ if master is None:
+ self.root = self.master = Tk()
+ else:
+ self.master = master
+ self.root = Toplevel(self.master)
+ self.root.minsize(1, 1)
+
+ # Create menu bar
+ self.mbar = Frame(self.root,
+ {'relief': 'raised',
+ 'border': 2})
+ self.mbar.pack({'fill': 'x'})
+
+ # Create File menu
+ self.filebutton = Menubutton(self.mbar, {'text': 'File'})
+ self.filebutton.pack({'side': 'left'})
+
+ self.filemenu = Menu(self.filebutton)
+ self.filebutton['menu'] = self.filemenu
+
+ # Create Edit menu
+ self.editbutton = Menubutton(self.mbar, {'text': 'Edit'})
+ self.editbutton.pack({'side': 'left'})
+
+ self.editmenu = Menu(self.editbutton)
+ self.editbutton['menu'] = self.editmenu
+
+ # Magic so you can swipe from one button to the next
+ self.mbar.tk_menuBar(self.filebutton, self.editbutton)
+
+ # Populate File menu
+ self.filemenu.add('command', {'label': 'New',
+ 'command': self.new_command})
+ self.filemenu.add('command', {'label': 'Open...',
+ 'command': self.open_command})
+ self.filemenu.add('command', {'label': 'Clone',
+ 'command': self.clone_command})
+ self.filemenu.add('separator')
+ self.filemenu.add('command', {'label': 'Close',
+ 'command': self.close_command})
+ self.filemenu.add('command', {'label': 'Quit',
+ 'command': self.quit_command})
+
+ # Populate Edit menu
+ pass
+
+ # Create topframe for the entry and button
+ self.topframe = Frame(self.root)
+ self.topframe.pack({'fill': 'x'})
+
+ # Create a label in front of the entry
+ self.urllabel = Label(self.topframe, {'text': 'URL:'})
+ self.urllabel.pack({'side': 'left'})
+
+ # Create the entry containing the URL
+ self.entry = Entry(self.topframe,
+ {'relief': 'sunken', 'border': 2})
+ self.entry.pack({'side': 'left', 'fill': 'x', 'expand': 1})
+ self.entry.bind('<Return>', self.loadit)
+
+ # Create the button
+ self.reload = Button(self.topframe,
+ {'text': 'Reload',
+ 'command': self.reload})
+ self.reload.pack({'side': 'right'})
+
+ # Create botframe for the text and scrollbar
+ self.botframe = Frame(self.root)
+ self.botframe.pack({'fill': 'both', 'expand': 1})
+
+ # The Scrollbar *must* be created first
+ self.vbar = Scrollbar(self.botframe)
+ self.vbar.pack({'fill': 'y', 'side': 'right'})
+ self.text = Text(self.botframe)
+ self.text.pack({'expand': 1, 'fill': 'both', 'side': 'left'})
+
+ # Link Text widget and Scrollbar
+ self.text['yscrollcommand'] = (self.vbar, 'set')
+ self.vbar['command'] = (self.text, 'yview')
+
+ self.url = None
+
+ def load(self, url):
+ # Load a new URL into the window
+ fp, url = self.urlopen(url)
+ if not fp:
+ return
+
+ self.url = url
+
+ self.root.title(url)
+
+ self.entry.delete('0', 'end')
+ self.entry.insert('end', url)
+
+ self.text.delete('0.0', 'end')
+
+ while 1:
+ line = fp.readline()
+ if not line: break
+ if line[-2:] == '\r\n': line = line[:-2] + '\n'
+ self.text.insert('end', line)
+ self.root.update_idletasks()
+
+ fp.close()
+
+ def urlopen(self, url):
+ # Open a URL --
+ # return (fp, url) if successful
+ # display dialog and return (None, url) for errors
+ try:
+ fp = urllib.urlopen(url)
+ except IOError, msg:
+ import types
+ if type(msg) == types.TupleType and len(msg) == 4:
+ if msg[1] == 302:
+ m = msg[3]
+ if m.has_key('location'):
+ url = m['location']
+ return self.urlopen(url)
+ elif m.has_key('uri'):
+ url = m['uri']
+ return self.urlopen(url)
+ self.errordialog(IOError, msg)
+ fp = None
+ return fp, url
+
+ def errordialog(self, exc, msg):
+ # Display an error dialog -- return when the user clicks OK
+ Dialog.Dialog(self.root, {
+ 'text': str(msg),
+ 'title': exc,
+ 'bitmap': 'error',
+ 'default': 0,
+ 'strings': ('OK',),
+ })
+
+ def go(self):
+ # Start Tk main loop
+ self.root.mainloop()
+
+ def reload(self, *args):
+ # Callback for Reload button
+ if self.url:
+ self.load(self.url)
+
+ def loadit(self, *args):
+ # Callback for <Return> event in entry
+ self.load(self.entry.get())
+
+ def new_command(self):
+ # File/New...
+ Viewer(self.master)
+
+ def clone_command(self):
+ # File/Clone
+ v = Viewer(self.master)
+ v.load(self.url)
+
+ def open_command(self):
+ # File/Open...
+ print "File/Open...: Not implemented"
+
+ def close_command(self):
+ # File/Close
+ self.destroy()
+
+ def quit_command(self):
+ # File/Quit
+ self.root.quit()
+
+ def destroy(self):
+ # Destroy this window
+ self.root.destroy()
+ if self.master is not self.root and not self.master.children:
+ self.master.quit()
+
+main()