borland.jbcl Packages  borland.jbcl Class Hierarchy  borland.jbcl.util 

ItemMulticaster class

java.lang.Object
   +----borland.jbcl.util.ItemMulticaster

About the ItemMulticaster class

Properties  Methods  

Implements ItemListener, EventListener

A class that dispatches item events to multiple listeners. ItemSelectable objects fire item events when an item is selected or unselected. ItemMulticaster maintains an array of listeners. The add(), remove(), and find() methods maintain this list.

The hasListeners() method determines whether any objects are listening for item events. The dispatch() method sends an item event to all listeners.

See also: Standard Java events, Events in JBCL


ItemMulticaster properties

*Read-only properties **Write-only properties

Properties implemented in java.lang.Object

ItemMulticaster methods

Methods implemented in this class

Methods implemented in java.lang.Object


ItemMulticaster methods

add(java.awt.event.ItemListener)

  public final synchronized void add(java.awt.event.ItemListener listener)
Adds an object to the array of listeners.

Parameters:

listener
The object that is added to the list of listeners for item events.

dispatch(java.awt.event.ItemEvent)

  public final void dispatch(java.awt.event.ItemEvent e)
Sends an item event to all listeners. The method is a high-speed dispatcher that does not need to be synchronized.

Parameters:

e
The item event sent to all listeners.

find(java.awt.event.ItemListener)

  public int find(java.awt.event.ItemListener listener)
Searches for the specified listener among the array of listening objects.

Parameters:

listener
The object you are searching for in the list of listeners.

hasListeners()

  public final boolean hasListeners()
Determines if there are any listeners for item events. If the method returns true, one or more listeners are present.

remove(java.awt.event.ItemListener)

  public final synchronized void remove(java.awt.event.ItemListener listener)
Removes the specified listening object from the array of listeners for item events.

Parameters:

listener
The listening object that is removed from the array of listeners.