IVetoableValue (Eclipse Platform API Specification)

Type Parameters:

T - the type of value being observed

All Superinterfaces:

IObservable, IObservableValue<T>

All Known Implementing Classes:

AbstractVetoableValue, DecoratingVetoableValue
```
public interface IVetoableValue<T>
extends IObservableValue<T>
```
An observable value whose changes can be vetoed by listeners.

Since:

1.0

Restriction:

This interface is not intended to be implemented by clients. Clients should instead subclass one of the classes that implement this interface. Note that direct implementers of this interface outside of the framework will be broken in future releases when methods are added to this interface.

Restriction:

This interface is not intended to be extended by clients.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addValueChangingListener(IValueChangingListener<T> listener)`
`void`	`removeValueChangingListener(IValueChangingListener<T> listener)`

Methods inherited from interface org.eclipse.core.databinding.observable.IObservable
addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, isStale, removeChangeListener, removeDisposeListener, removeStaleListener

Methods inherited from interface org.eclipse.core.databinding.observable.value.IObservableValue
addValueChangeListener, getValue, getValueType, removeValueChangeListener, setValue

- Method Detail
  - addValueChangingListener
```
void addValueChangingListener(IValueChangingListener<T> listener)
```
    Parameters:
    
    listener - the listener to add; not null
  - removeValueChangingListener
```
void removeValueChangingListener(IValueChangingListener<T> listener)
```
    Parameters:
    
    listener - the listener to remove; not null