Perl/Tk utilizes the object-oriented features available in Perl 5, so even if you don't completely understand OO programming, you should be able to recognize it when you see it. The only other thing you'll need is prior knowledge of other graphical user interfaces (GUIs) and your opinions on them. This helps when deciding what features to include in your own applications. Take a look at the word processor you use on your PC, your web browser, or any program that has buttons and scrollbars and accepts both mouse and keyboard input.

In this book, we'll be covering each basic widget and all its associated options in detail. You'll learn how to make a window look the way you want it to look. You'll also learn how to make a window user-friendly and attractive. Other important topics include image creation and manipulation, interprocess communications, and mega-widget details. We also take a look inside the Tk event loop, encompassing events, bindings, and callbacks.