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Ruby Programming
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Widgets

Creating widgets is easy. Take the name of the widget as given in the Tk documentation and add a Tk to the front of it. For instance, the widgets Label, Button, and Entry become the classes TkLabel, TkButton, and TkEntry. You create an instance of a widget using new, just as you would any other object. If you don't specify a parent for a given widget, it will default to the root-level frame. We usually want to specify the parent of a given widget, along with many other options---color, size, and so on. We also need to be able to get information back from our widgets while our program is running by setting up callbacks and sharing data.
Ruby Programming
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