Eclipse Plug-in Developer Guide (Galileo) - ValueChangeEvent (Eclipse Platform API Specification)

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Eclipse Platform
Release 3.5

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org.eclipse.core.databinding.observable.value
Class ValueChangeEvent


java.lang.Object
  

java.util.EventObject
      

org.eclipse.core.databinding.observable.ObservableEvent
          
org.eclipse.core.databinding.observable.value.ValueChangeEvent

All Implemented Interfaces:: Serializable

public class ValueChangeEvent
extends ObservableEvent
extends ObservableEvent

Value change event describing a change of an IObservableValue object's current value.

Since:: 1.0
See Also:: Serialized Form

Field Summary

ValueDiff diff
          Description of the change to the source observable value.

Fields inherited from class java.util. EventObject

source

Constructor Summary

ValueChangeEvent ( IObservableValue source, ValueDiff diff)
          Creates a new value change event.

Method Summary

protected void dispatch ( IObservablesListener listener)
          Dispatch this event to the given listener.

protected Object getListenerType ()
          Returns a unique object used for distinguishing this event type from others.

IObservableValue getObservableValue ()
          Returns the observable value from which this event originated.

Methods inherited from class org.eclipse.core.databinding.observable. ObservableEvent

getObservable

Methods inherited from class java.util. EventObject

getSource, toString

Methods inherited from class java.lang. Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

diff

public 
ValueDiff diff

Description of the change to the source observable value. Listeners must not change this field.

Constructor Detail

ValueChangeEvent

public ValueChangeEvent(
IObservableValue source,
                        
ValueDiff diff)

Creates a new value change event.

Parameters:: source - the source observable value; diff - the value change

Method Detail

getObservableValue

public 
IObservableValue getObservableValue()

Returns the observable value from which this event originated.

Returns:: returns the observable value from which this event originated

dispatch

protected void dispatch(
IObservablesListener listener)

Description copied from class: ObservableEvent

Dispatch this event to the given listener. Subclasses must implement this method by calling the appropriate type-safe event handling method on the given listener according to the type of this event.

Specified by:: dispatch in class ObservableEvent

Parameters:: listener - the listener that should handle the event

getListenerType

protected 
Object getListenerType()