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* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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*/
package javafx.beans.property;
import com.sun.javafx.binding.
ListExpressionHelper;
import javafx.beans.
InvalidationListener;
import javafx.beans.value.
ChangeListener;
import javafx.collections.
ListChangeListener;
import javafx.collections.
ObservableList;
/**
* Base class for all readonly properties wrapping a {@link javafx.collections.ObservableList}.
* This class provides a default implementation to attach listener.
*
* @see ReadOnlyListProperty
* @since JavaFX 2.1
*/
public abstract class
ReadOnlyListPropertyBase<E> extends
ReadOnlyListProperty<E> {
private
ListExpressionHelper<E>
helper;
@
Override
public void
addListener(
InvalidationListener listener) {
helper =
ListExpressionHelper.
addListener(
helper, this,
listener);
}
@
Override
public void
removeListener(
InvalidationListener listener) {
helper =
ListExpressionHelper.
removeListener(
helper,
listener);
}
@
Override
public void
addListener(
ChangeListener<? super
ObservableList<E>>
listener) {
helper =
ListExpressionHelper.
addListener(
helper, this,
listener);
}
@
Override
public void
removeListener(
ChangeListener<? super
ObservableList<E>>
listener) {
helper =
ListExpressionHelper.
removeListener(
helper,
listener);
}
@
Override
public void
addListener(
ListChangeListener<? super E>
listener) {
helper =
ListExpressionHelper.
addListener(
helper, this,
listener);
}
@
Override
public void
removeListener(
ListChangeListener<? super E>
listener) {
helper =
ListExpressionHelper.
removeListener(
helper,
listener);
}
/**
* This method needs to be called if the reference to the
* {@link javafx.collections.ObservableList} changes.
*
* It sends notifications to all attached
* {@link javafx.beans.InvalidationListener InvalidationListeners},
* {@link javafx.beans.value.ChangeListener ChangeListeners}, and
* {@link javafx.collections.ListChangeListener}.
*
* This method needs to be called, if the value of this property changes.
*/
protected void
fireValueChangedEvent() {
ListExpressionHelper.
fireValueChangedEvent(
helper);
}
/**
* This method needs to be called if the content of the referenced
* {@link javafx.collections.ObservableList} changes.
*
* Sends notifications to all attached
* {@link javafx.beans.InvalidationListener InvalidationListeners},
* {@link javafx.beans.value.ChangeListener ChangeListeners}, and
* {@link javafx.collections.ListChangeListener}.
*
* This method is called when the content of the list changes.
*
* @param change the change that needs to be propagated
*/
protected void
fireValueChangedEvent(
ListChangeListener.
Change<? extends E>
change) {
ListExpressionHelper.
fireValueChangedEvent(
helper,
change);
}
}