Events and the Listbox widget

[Martin Franklin]

The Pmw.ScrolledListBox has a selectioncommand This specifies a function 
to call when mouse button 1 is single clicked over an entry in the
listbox
component.



HTH
Martin


Hans Kristian Ruud wrote:
> 
> >
> > >>> Hans Kristian Ruud <hans.kristian.ruud at inenco.no> 10/03/00 09:27AM >>>
> > I have generated a listbox, and wish to extract some information when a
> > user
> >   clicks on an item:
> >
> >           list = Listbox(canvas,width=15 )
> >           list.pack(side=TOP)
> >           list.bind('<ButtonPress>', chooseSheet)
> >
> >           def chooseSheet(event):
> >                   listbox = event.widget
> >                   selected = listbox.curselection()
> >                   setCurSheet( selected[0] )
> >
> >   My problem is that the list of selected values from
> > listbox.curselection()
> >   is not updated until after chooseSheet is called, i.e. the function
> >
> >   listbox.curselection()
> >
> >   returns the PREVIOUS element that was clicked.
> >
> >   Originally I had bound the function to root, and then it worked fine,
> > however
> >   I do not want the function chooseSheet to be executed when I click on
> > buttons
> >   and such that I have added later.
> >
> >   Any ideas?
> >   Thanks in advance
> 
> >
> > Jake Baker wrote:
> >
> >> Use list.bind('<<ListboxSelect>>') instead.
> >>
> >
> > This would of course be the ideal solution; however this feature was only
> > implemented in
> > Tcl/Tk 8.3.?, whereas Python 1.5.2 comes with Tcl/Tk 8.0. Upgrading to
> > Python 1.6 is
> > not an option, as the win32com package is not available for Python 1.6
> >
> 
> This is the solution that I arrived at:
> 
> list   = Listbox(canvas, width=15 )
> list.bind('<ButtonPress>', self.chooseSheet)
> .
> .
> 
>  def chooseSheet(event):
>     listbox = event.widget
>     selection = listbox.nearest(event.y)
>     setCurSheet( selection )
> 
> --
> Hans Kristian
> 
> --
> http://www.python.org/mailman/listinfo/python-list