On Thu, Jan 13, 2005 at 09:14:54AM -0600, Jeff Epler wrote:
.
.
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> You need to learn about "break" and bindings. When you return the
> string "break" from a binding, any subsequent binding that would have
> been executed (such as the default one for inserting characters into an
> entry widget).
>
> Here's a simple program that uses 'return "break"':
> import Tkinter
>
> def modified_inserter(event):
> event.widget.insert(Tkinter.INSERT, "b")
> return "break"
>
> e = Tkinter.Entry()
> e.bind("a", modified_inserter)
> e.pack()
> e.focus()
> e.mainloop()
> It doesn't get everything right (for instance, it doesn't delete any
> selected text in the entry before inserting) but it shows the general
> principle.
.
.
.
An alternative approach is to use traces. Some programmers
prefer traces on variables, some bindings on Events.
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