Package com.google.gwt.user.client.ui

Class DelegatingChangeListenerCollection

java.lang.Object

java.util.AbstractCollection<ChangeListener>

java.util.AbstractList<ChangeListener>

java.util.ArrayList<ChangeListener>

com.google.gwt.user.client.ui.ChangeListenerCollection

com.google.gwt.user.client.ui.DelegatingChangeListenerCollection

All Implemented Interfaces:

ChangeListener, Serializable, Cloneable, Iterable<ChangeListener>, Collection<ChangeListener>, EventListener, List<ChangeListener>, RandomAccess, SequencedCollection<ChangeListener>

@Deprecated
public class DelegatingChangeListenerCollection
extends ChangeListenerCollection
implements ChangeListener

Deprecated.

Use Widget.delegateEvent instead

ChangeListenerCollection used to correctly hook up listeners which need to listen to events from another source.

For example, Composite widgets often need to listen to events generated on their wrapped widget. Upon the firing of a wrapped widget's event, the composite widget must fire its own listeners with itself as the source of the event. To use a DelegatingChangeListenerCollection, simply use the DelegatingChangeListenerCollection instead of a ChangeListenerCollection. For example, in SuggestBox, the following code is used to listen to change events on the SuggestBox's underlying widget.

  public void addChangeListener(ChangeListener listener) {
    if (changeListeners == null) {
      changeListeners = new DelegatingChangeListenerCollection(this, box);
    }
    changeListeners.add(listener);
  }

See Also:

• Serialized Form

Field Summary

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor	Description
DelegatingChangeListenerCollection(Widget owner, SourcesChangeEvents delegatedTo)	Deprecated. Constructor for DelegatingChangeListenerCollection.

Method Summary

Modifier and Type	Method	Description
void	onChange(Widget sender)	Deprecated. Fired when a widget changes, where 'change' is defined by the widget sending the event.

Methods inherited from class com.google.gwt.user.client.ui.ChangeListenerCollection

fireChange

Methods inherited from class java.util.ArrayList

add, add, addAll, addAll, addFirst, addLast, clear, clone, contains, ensureCapacity, equals, forEach, get, getFirst, getLast, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeFirst, removeIf, removeLast, removeRange, replaceAll, retainAll, set, size, sort, spliterator, subList, toArray, toArray, trimToSize

Methods inherited from class java.util.AbstractCollection

containsAll, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, stream, toArray

Methods inherited from interface java.util.List

containsAll, reversed

Constructor Details

DelegatingChangeListenerCollection

public DelegatingChangeListenerCollection(Widget owner,
 SourcesChangeEvents delegatedTo)

Deprecated.

Constructor for DelegatingChangeListenerCollection.

Parameters:

owner - owner of listeners

delegatedTo - source of events

Method Details

onChange

public void onChange(Widget sender)

Deprecated.

Description copied from interface: ChangeListener

Fired when a widget changes, where 'change' is defined by the widget sending the event.

Specified by:

onChange in interface ChangeListener

Parameters:

sender - the widget that has changed