highly configurable file dialog widget for Perl/Tk

 This file dialog widget called Tk::Filedialog is a collection of sub-widgets:
 a listbox for files and (optionally) directories, an entry for filename, an
 (optional) entry for pathname, an entry for a filter pattern, a 'ShowAll'
 checkbox (for enabling display of .* files and directories), and three
 buttons, namely OK, Rescan, and Cancel