Class ValueChangingEvent<T>
java.lang.Object
java.util.EventObject
org.eclipse.core.databinding.observable.ObservableEvent
org.eclipse.core.databinding.observable.value.ValueChangingEvent<T>
- Type Parameters:
T
- the type of value being observed
- All Implemented Interfaces:
Serializable
Value changing event describing a pending change of an
IObservableValue
object's current value. Listeners can veto the
pending change by setting veto
to true
.- Since:
- 1.0
- See Also:
-
Field Summary
FieldsModifier and TypeFieldDescriptionDescription of the change to the source observable value.boolean
Flag for vetoing this change.Fields inherited from class java.util.EventObject
source
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Constructor Summary
ConstructorsConstructorDescriptionValueChangingEvent
(IObservableValue<T> source, ValueDiff<T> diff) Creates a new value changing event. -
Method Summary
Modifier and TypeMethodDescriptionprotected void
dispatch
(IObservablesListener listener) Dispatch this event to the given listener.protected Object
Returns a unique object used for distinguishing this event type from others.Methods inherited from class org.eclipse.core.databinding.observable.ObservableEvent
getObservable
Methods inherited from class java.util.EventObject
getSource, toString
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Field Details
-
diff
Description of the change to the source observable value. Listeners must not change this field. -
veto
public boolean vetoFlag for vetoing this change. Default value isfalse
, can be set totrue
by listeners to veto this change.
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Constructor Details
-
ValueChangingEvent
Creates a new value changing event.- Parameters:
source
- the source observable valuediff
- the value change
-
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Method Details
-
getObservableValue
- Returns:
- the observable value from which this event originated
-
dispatch
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 classObservableEvent
- Parameters:
listener
- the listener that should handle the event
-
getListenerType
Description copied from class:ObservableEvent
Returns a unique object used for distinguishing this event type from others.- Specified by:
getListenerType
in classObservableEvent
- Returns:
- a unique object representing the concrete type of this event.
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