initial checkin of www Tk examples

1 files changed, 60 insertions, 0 deletions

diff --git a/Demo/tkinter/www/www9.py b/Demo/tkinter/www/www9.py
new file mode 100755
index 0000000..60b46ed
--- /dev/null
+++ b/Demo/tkinter/www/www9.py
@@ -0,0 +1,60 @@
+#! /usr/local/bin/python
+
+# www9.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
+
+import sys
+import urllib
+from Tkinter import *
+
+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]
+	viewer = Viewer()
+	viewer.load(url)
+	viewer.go()
+
+class Viewer:
+
+	def __init__(self):
+		# Create root window
+		self.root = Tk()
+		self.root.minsize(1, 1)
+
+		# The Scrollbar *must* be created first
+		self.vbar = Scrollbar(self.root)
+		self.vbar.pack({'fill': 'y', 'side': 'right'})
+		self.text = Text(self.root)
+		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')
+
+	def load(self, url):
+		# Load a new URL into the window
+		fp = urllib.urlopen(url)
+
+		self.root.title(url)
+
+		self.text.delete('0.0', 'end')
+
+		while 1:
+			line = fp.readline()
+			if not line: break
+			self.text.insert('end', line)
+			self.root.update_idletasks()
+
+		fp.close()
+
+	def go(self):
+		# Start Tk main loop
+		self.root.mainloop()
+
+main()