Adobe Flash Professional CS3 Manual do Utilizador descarregar pdf (Página 370)

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FLASH CS3

User Guide

364

Note: With inverse logic, a value of true in ActionScript corresponds to a check box that is not selected in the Accessi-

bility panel, and a value of

false in ActionScript corresponds to a selected check box in the Accessibility panel.

Modifying the

_accProps variable has no effect by itself. You must also use the Accessibility.updateProp-

erties method to inform screen reader users of Flash content changes. Calling the method causes Flash Player to

re-examine all accessibility properties, update property descriptions for the screen reader, and, if necessary, send

events to the screen reader that indicate changes have occurred.

When updating accessibility properties of multiple objects at once, include only a single call to

Accessi-

blity.updateProperties (too frequent updates to the screen reader can cause some screen readers to become too

verbose).

See the Accessibility.updateProperties method in the ActionScript 2.0 Language Reference.

Implementing screen reader detection with the Accessibility.isActive() method

To create Flash content that behaves in a specific way if a screen reader is active, use the Accessi-

bility.isActive() ActionScript method, which returns a value of true if a screen reader is present, and false

otherwise. You can then design your Flash content to perform so that it’s compatible with screen reader use (for

example, by hiding child elements from the screen reader). For more information, see isActive (Accessibility.isActive

method) in ActionScript 2.0 Language Reference.

Property Type Equivalent selection in

the Accessibility panel

Applies to

.silent Boolean Make Movie Acces-

sible/Make Object Acces-

sible (inverse logic)

Entire documents

Buttons

Movie clips

Dynamic text

Input text

.forceSimple Boolean Make Child Objects

Accessible (inverse logic)

Entire documents

Movie clips

.name string Name Entire documents

Buttons

Movie clips

Input text

.description string Description Entire documents

Buttons

Movie clips

Dynamic text

Input text

.shortcut string Shortcut Buttons

Movie clips

Input text

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