Widgets
Widgets in Perl/Tk are created with widget
creation commands, which include Button, Canvas, CheckButton, Entry, Frame, Label, Listbox, Menu, Menubutton, Message, Radiobutton, Scale, Scrollbar, Text, and Toplevel, among many, many others.
Positioning widgets is done with geometry
managers. In the “Hello World” example shown earlier, the
pack command is the geometry
manager. Geometry managers determine where in the window (or frame)
the widget will sit. We’ll talk more about the Perl/Tk geometry
managers later in this chapter.
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