B.37 Auditory Feedback Actions

A general framework for providing auditory feedback in response to user interface actions was introduced in Version 1.4. BasicLookAndFeel (as described in Chapter 26) provides most of the support, and other L&Fs extend it in order to actually play appropriate sounds. As of SDK 1.4.1, none of the standard L&Fs turn on any sounds by default. Comments in the source code indicate that this has been delayed due to sound bugs.

The list of possible actions to which a sound can be assigned is contained in a special ActionMap managed by BasicLookAndFeel. It is protected since only subclasses are likely to need access to it. They can obtain (or create, if necessary) the map by calling getAudioActionMap( ). The keys in this map are shown in Table B-45. The values are Actions that produce appropriate sounds when they are performed. The standard L&Fs define inner AudioAction classes for this purpose.

Table B-45. Audio actions defined by BasicLookAndFeel

CheckBoxMenuItem.commandSound	InternalFrame.closeSound
InternalFrame.maximizeSound	InternalFrame.minimizeSound
InternalFrame.restoreDownSound	InternalFrame.restoreUpSound
MenuItem.commandSound	OptionPane.errorSound
OptionPane.informationSound	OptionPane.questionSound
OptionPane.warningSound	PopupMenu.popupSound
RadioButtonMenuItem.commandSound