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Chapter 20. Accessibility > About Keyboard Navigation

About Keyboard Navigation

Keyboard navigation—an alternative to the point-and-click style of user interface—makes Director movies accessible to users with motor and visual impairments. If there are buttons on the Stage that the user would ordinarily click with the mouse, he or she has the option of using the Tab key to move from button to button, then pressing the Enter or Return key to “click” the currently selected button. (For blind users, keyboard navigation must be accompanied by an audible means of identifying each button. See “Adding Text-to-Speech Capability,” later in this chapter.)

In order for keyboard navigation to work properly, all the available buttons must be on the screen at the same time, and the movie must be designed to pause or loop until the user has clicked a button that will make the movie continue (Figure 20.1). (For instructions on designing this type of interaction, see “Scripting Navigation” in Chapter 15.) The buttons and other objects that the user may navigate at any given time constitute an accessibility group. A movie may contain any number of accessibility groups, each of which appears on the Stage at a different time (Figure 20.2).


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