-Q2.D.6- have a listbox only allow the selection of a single item
From: -II- Tk Questions and Answers - How can I:
at a time?
A2.D.6. See the man page for the tk command "tk_listboxSingleSelect". An
invocation such as the following:
listbox .l
tk_listboxSingleSelect .l
will modify the bindings of the widget .l so that only a single item of
the listbox can be selected at a time.
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