checkin of Jack's original version

Tools/modulator/ScrolledListbox.py

@@ -0,0 +1,37 @@
+# A ScrolledList widget feels like a list widget but also has a
+# vertical scroll bar on its right.  (Later, options may be added to
+# add a horizontal bar as well, to make the bars disappear
+# automatically when not needed, to move them to the other side of the
+# window, etc.)
+#
+# Configuration options are passed to the List widget.
+# A Frame widget is inserted between the master and the list, to hold
+# the Scrollbar widget.
+# Most methods calls are inherited from the List widget; Pack methods
+# are redirected to the Frame widget however.
+
+from Tkinter import *
+from Tkinter import _cnfmerge
+
+class ScrolledListbox(Listbox):
+	def __init__(self, master=None, cnf={}):
+		cnf = _cnfmerge(cnf)
+		fcnf = {}
+		vcnf = {'name': 'vbar',
+			Pack: {'side': 'right', 'fill': 'y'},}
+		for k in cnf.keys():
+			if type(k) == ClassType or k == 'name':
+				fcnf[k] = cnf[k]
+				del cnf[k]
+		self.frame = Frame(master, fcnf)
+		self.vbar = Scrollbar(self.frame, vcnf)
+		cnf[Pack] = {'side': 'left', 'fill': 'both', 'expand': 'yes'}
+		cnf['name'] = 'list'
+		Listbox.__init__(self, self.frame, cnf)
+		self['yscrollcommand'] = (self.vbar, 'set')
+		self.vbar['command'] = (self, 'yview')
+
+		# Copy Pack methods of self.frame -- hack!
+		for m in Pack.__dict__.keys():
+			if m[0] != '_' and m != 'config':
+				setattr(self, m, getattr(self.frame, m))