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Eclipse Platform
Release 3.5

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

java.lang.Object
  extended by 

org.eclipse.core.databinding.observable.AbstractObservable
      extended by 

org.eclipse.core.databinding.observable.value.AbstractObservableValue
          extended by 
org.eclipse.core.databinding.observable.value.SelectObservableValue
All Implemented Interfaces:
IObservable, IObservableValue

public class SelectObservableValue
extends AbstractObservableValue

An observable value which behaves similarly to the <select> and <option> HTML tags. A SelectObservableValue has a number of options added to it via the addOption(Object, IObservableValue) method. The value of the SelectObservableValue is the value of whichever option's observable has a value of Boolean.TRUE, or null if none of the observable's values are Boolean.TRUE.

Since:
1.2
Restriction:
This class is not intended to be subclassed by clients.

Constructor Summary
SelectObservableValue ()
          Constructs a SelectObservableValue on the default realm.
SelectObservableValue ( Object valueType)
          Constructs a SelectObservableValue on the default realm, with the given value type.
SelectObservableValue ( Realm realm)
          Constructs a SelectObservableValue on the specified realm.
SelectObservableValue ( Realm realm, Object valueType)
          Constructs a SelectObservableValue on the given realm, with the given value type.
 
Method Summary
protected  void addListener ( Object listenerType, IObservablesListener listener)
           
 void addOption ( Object value, IObservableValue observable)
          Adds an option to this SelectObservableValue.
protected   Object clone ()
           
protected   Object doGetValue ()
           
protected  void doSetValue ( Object value)
          Template method for setting the value of the observable.
protected  void fireEvent ( ObservableEvent event)
           
protected  void firstListenerAdded ()
           
  Realm getRealm ()
           
  Object getValueType ()
          The value type of this observable value, or null if this observable value is untyped.
protected  boolean hasListeners ()
           
protected  void lastListenerRemoved ()
           
protected  void removeListener ( Object listenerType, IObservablesListener listener)
           
 
Methods inherited from class org.eclipse.core.databinding.observable.value. AbstractObservableValue
addValueChangeListener, fireChange, fireValueChange, getValue, isStale, removeValueChangeListener, setValue
 
Methods inherited from class org.eclipse.core.databinding.observable. AbstractObservable
addChangeListener, addDisposeListener, addStaleListener, checkRealm, dispose, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
 
Methods inherited from class java.lang. Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.eclipse.core.databinding.observable. IObservable
addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
 

Constructor Detail

SelectObservableValue

public SelectObservableValue()
Constructs a SelectObservableValue on the default realm.


SelectObservableValue

public SelectObservableValue(
Realm realm)
Constructs a SelectObservableValue on the specified realm.

Parameters:
realm - the realm

SelectObservableValue

public SelectObservableValue(
Object valueType)
Constructs a SelectObservableValue on the default realm, with the given value type.

Parameters:
valueType - the value type

SelectObservableValue

public SelectObservableValue(
Realm realm,
                             
Object valueType)
Constructs a SelectObservableValue on the given realm, with the given value type.

Parameters:
realm - the realm
valueType - the value type
Method Detail

firstListenerAdded

protected void firstListenerAdded()

lastListenerRemoved

protected void lastListenerRemoved()

getValueType

public 
Object getValueType()
Description copied from interface: IObservableValue
The value type of this observable value, or null if this observable value is untyped.

Returns:
the value type, or null

addOption

public void addOption(
Object value,
                      
IObservableValue observable)
Adds an option to this SelectObservableValue. If the observable contains Boolean.TRUE then the selection changes immediately to the given value.

Parameters:
value - The value associated with the provided observable
observable - an observable of value type Boolean.class or Boolean.TYPE

doGetValue

protected 
Object doGetValue()
Specified by:
doGetValue in class AbstractObservableValue

doSetValue

protected void doSetValue(
Object value)
Description copied from class: AbstractObservableValue
Template method for setting the value of the observable. By default the method throws an UnsupportedOperationException .

Overrides:
doSetValue in class AbstractObservableValue

addListener

protected void addListener(
Object listenerType,
                           
IObservablesListener listener)
Parameters:
listenerType -
listener -

removeListener

protected void removeListener(
Object listenerType,
                              
IObservablesListener listener)
Parameters:
listenerType -
listener -

hasListeners

protected boolean hasListeners()

fireEvent

protected void fireEvent(
ObservableEvent event)

getRealm

public 
Realm getRealm()
Returns:
Returns the realm.

clone

protected 
Object clone()
                throws 
CloneNotSupportedException
Overrides:
clone in class Object
Throws:
CloneNotSupportedException

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire