Module org.tquadrat.foundation.fx

Package org.tquadrat.foundation.fx.beans

Class ObservablePlaceholder

java.lang.Object

org.tquadrat.foundation.fx.beans.ObservablePlaceholder

All Implemented Interfaces:

Observable

@ClassVersion(sourceVersion="$Id: ObservablePlaceholder.java 1110 2024-03-04 15:26:06Z tquadrat $")
@API(status=STABLE,
     since="0.4.2")
public final class ObservablePlaceholder
extends Object
implements Observable

An implementation of the Observable interface that just serves as a placeholder.

As an instance of this class will never change its state, it will never call any of the registered listeners; consequently, a listener added by a call to addListener(InvalidationListener) will not even be stored somewhere, so that a call to removeListener(InvalidationListener) won't do anything either.

It is useful when creating bindings that do not change their status.

Author:

Thomas Thrien (thomas.thrien@tquadrat.org)

Version:

$Id: ObservablePlaceholder.java 1110 2024-03-04 15:26:06Z tquadrat $

Since:

0.4.2

UML Diagram

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UML Diagram for "org.tquadrat.foundation.fx.beans.ObservablePlaceholder"

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Constructor Summary

Constructors

Constructor	Description
ObservablePlaceholder()	Creates a new instance of ObservablePlaceholder.

Method Summary

Modifier and Type	Method	Description
final void	addListener(InvalidationListener listener)
final void	removeListener(InvalidationListener listener)

Methods inherited from class java.lang.Object

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

Methods inherited from interface javafx.beans.Observable

subscribe

Constructor Details

ObservablePlaceholder

public ObservablePlaceholder()

Creates a new instance of ObservablePlaceholder.

Method Details

addListener

public final void addListener(InvalidationListener listener)

Specified by:

addListener in interface Observable

removeListener

public final void removeListener(InvalidationListener listener)

Specified by:

removeListener in interface Observable