# Package javax.help.event

package javax.help.event
Supports event changes in JavaHelp classes. `HelpModelEvent` and `HelpModelListener` support changes to the locations within HelpSets being presented, `TextHelpModelEvent` and `TextHelpModelListener` support textual changes and `HelpSetEvent`, and `HelpSetListener` support changes to the HelpSet itself.

`EventListenerList` is used as a convenience class to maintain lists of listeners and it is functionally equivalent to the equivalent Swing class--it is included to avoid adding unwanted dependencies on Swing.

## Related Documentation

For overviews, tutorials, examples, guides, tool support, and other documentation, please see the JavaHelp System User's Guide.

Related Packages
Package
Description
javax.help
Supports presentation of online documentation with both content and contextual views of this information.
javax.help.plaf
Supports access to Component UI classes.
javax.help.resources
Supports localization of JavaHelp.
javax.help.search
Supports simple access to search engines.
javax.help.tagext
Class
Description
EventListenerList
A class that holds a list of EventListeners.
HelpHistoryModelEvent
Notifies interested parties that a change in a Help History Model source has occurred.
HelpHistoryModelListener
HelpModelEvent
Notifies interested parties that a change in a Help Model source has occurred.
HelpModelListener
Defines the interface for an object that listens to changes in a HelpModel.
HelpSetEvent
Conveys information when a HelpSet is added/removed.
HelpSetListener
Defines the interface of an object that listens to changes in the HelpSet.
TextHelpModelEvent
Notifies interested parties when a change in a TextHelpModel occurs.
TextHelpModelListener
Defines the interface for an object that listens to changes in a TextHelpModel.