I won't answer the original question - sorry, no time to look at the code :-)
But why roll your own? There is a PMW widget called ScrolledListBox that probably does all that you require. I would highly recommend the PMW distribution - it is exceptionally well thought out and (IMO :-)) brilliantly executed. You can find it through any of the Python resource pages or by Googling "Python PMW". It has been around (and exceptionally stable) for a number of years now - it is at v1.2. I have been using it for close to 8 years and it has only been up rev'd once in that time. It forms an excellent framework for creating your own composite widgets as well. There is a bit of a learning curve to achieve that part (using ScrolledListBox is easy) but once you get your head around the philosophy of the package it is fantastically powerful. So have a look at PMW - I can't recommend it enough :-) Peter On Mon, Aug 4, 2008 at 7:34 AM, vtcodger <[EMAIL PROTECTED]> wrote: > > I wonder if someone who understands Python and Tkinter a bit better than I > could help me out. Basically, I'm trying to encapsulate the kind of messy > stuff associated with setting up a listbox with a scrollbar in a Python > class. From my probably incredibly naive point of view, it doesn't look > too > hard. > > class ScrolledList(Frame,Listbox,Scrollbar) : > #At this point we have a template for objects that have all the > #attributes and methods of Frames,Listboxes,and Scrollbars. For > #names that occur in all, the Frame version takes precedence over > #the Listbox version and that in turn takes precedence over > #Scrollbar version > > def __init__ (self, Tkobject, height=4, width=50) : > #This code is executed whenever a new scrolled list object is > #created (instantiated) > self.f = Frame(Tkobject) > s = Scrollbar(self.f,orient=VERTICAL) > self.l = Listbox(self.f, height=height, width=width, > yscrollcommand=s.set, exportselection=0) > #We have now created a frame, scrollbar and listbox > > s.config(command=self.l.yview) > s.pack(side=RIGHT, fill=Y); self.l.pack() > #And configured the listbox and scrollbar to interact > > And it creates a Tkinter object with a gazillion attributes. Unfortunately > tk isn't one of them. When I try to invoke the methods, I am informed that > the new object has no 'tk' attribute. That's correct. It doesn't. > Apparently I have failed to call some necessary constructor. But which? > > Maybe I'm close to having it right because if I create a grid attribute in > the class and pass the parameters to the frame grid method, the scrolled > listbox can be configured and displayed. > > def grid(self,row=90,column=1,rowspan=5,columnspan=4,sticky=W) : > > > self.f.grid(row=row,column=column,rowspan=rowspan,columnspan=columnspan,sticky=sticky) > > What am I doing wrong, or not doing right? > -- > View this message in context: > http://www.nabble.com/Creating-a-new-widget-class-tp18802754p18802754.html > Sent from the Python - tkinter-discuss mailing list archive at Nabble.com. > > _______________________________________________ > Tkinter-discuss mailing list > Tkinter-discuss@python.org > http://mail.python.org/mailman/listinfo/tkinter-discuss >
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