Class SelectObservableValue<T>
- java.lang.Object
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- org.eclipse.core.databinding.observable.AbstractObservable
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- org.eclipse.core.databinding.observable.value.AbstractObservableValue<T>
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- org.eclipse.core.databinding.observable.value.SelectObservableValue<T>
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- Type Parameters:
T- the type of value being observed
- All Implemented Interfaces:
IObservable,IObservableValue<T>
public class SelectObservableValue<T> extends AbstractObservableValue<T>
An observable value which behaves similarly to the <select> and <option> HTML tags. A SelectObservableValue has a number of options added to it via theaddOption(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.
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Constructor Summary
Constructors Constructor Description 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.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected voidaddListener(Object listenerType, IObservablesListener listener)voidaddOption(T value, IObservableValue<Boolean> observable)Adds an option to this SelectObservableValue.protected Objectclone()protected TdoGetValue()protected voiddoSetValue(Object value)Template method for setting the value of the observable.protected voidfireEvent(ObservableEvent event)protected voidfirstListenerAdded()RealmgetRealm()ObjectgetValueType()The value type of this observable value, ornullif this observable value is untyped.protected booleanhasListeners()protected voidlastListenerRemoved()protected voidremoveListener(Object listenerType, IObservablesListener listener)-
Methods inherited from class org.eclipse.core.databinding.observable.value.AbstractObservableValue
addValueChangeListener, fireChange, fireValueChange, getValue, isStale, removeValueChangeListener, setValue
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Methods inherited from class org.eclipse.core.databinding.observable.AbstractObservable
addChangeListener, addDisposeListener, addStaleListener, checkRealm, dispose, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
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Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.eclipse.core.databinding.observable.IObservable
addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
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Constructor Detail
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SelectObservableValue
public SelectObservableValue()
Constructs a SelectObservableValue on the default realm.
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SelectObservableValue
public SelectObservableValue(Realm realm)
Constructs a SelectObservableValue on the specified realm.- Parameters:
realm- the realm
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SelectObservableValue
public SelectObservableValue(Object valueType)
Constructs a SelectObservableValue on the default realm, with the given value type.- Parameters:
valueType- the value type
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Method Detail
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firstListenerAdded
protected void firstListenerAdded()
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lastListenerRemoved
protected void lastListenerRemoved()
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getValueType
public Object getValueType()
Description copied from interface:IObservableValueThe value type of this observable value, ornullif this observable value is untyped.- Returns:
- the value type, or
null
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addOption
public void addOption(T value, IObservableValue<Boolean> 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 observableobservable- an observable of value type Boolean.class or Boolean.TYPE
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doGetValue
protected T doGetValue()
- Specified by:
doGetValuein classAbstractObservableValue<T>
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doSetValue
protected void doSetValue(Object value)
Description copied from class:AbstractObservableValueTemplate method for setting the value of the observable. By default the method throws anUnsupportedOperationException.- Overrides:
doSetValuein classAbstractObservableValue<T>- Parameters:
value- the value to set
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addListener
protected void addListener(Object listenerType, IObservablesListener listener)
- Parameters:
listenerType- arbitrary object to identify a type of the listenerlistener- the listener to add; notnull
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removeListener
protected void removeListener(Object listenerType, IObservablesListener listener)
- Parameters:
listenerType- arbitrary object to identify a type of the listenerlistener- the listener to remove; notnull
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hasListeners
protected boolean hasListeners()
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fireEvent
protected void fireEvent(ObservableEvent event)
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getRealm
public Realm getRealm()
- Returns:
- Returns the realm.
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clone
protected Object clone() throws CloneNotSupportedException
- Overrides:
clonein classObject- Throws:
CloneNotSupportedException
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