DelegatingFocusListenerCollection (GWT Javadoc)

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GWT 2.7.0

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com.google.gwt.user.client.ui
Class DelegatingFocusListenerCollection

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractList<E>
          java.util.ArrayList<FocusListener>
              com.google.gwt.user.client.ui.FocusListenerCollection
                  com.google.gwt.user.client.ui.DelegatingFocusListenerCollection

All Implemented Interfaces:: FocusListener, java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<FocusListener>, java.util.Collection<FocusListener>, java.util.EventListener, java.util.List<FocusListener>, java.util.RandomAccess

Deprecated. Use Widget.delegateEvent(com.google.gwt.user.client.ui.Widget, com.google.gwt.event.shared.GwtEvent) instead

@Deprecated public class DelegatingFocusListenerCollection
extends FocusListenerCollection
implements FocusListener
extends FocusListenerCollection
implements FocusListener

FocusListenerCollection 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 DelegatingFocusListenerCollection, simply use the DelegatingFocusListenerCollection instead of a FocusListenerCollection. For example, in SuggestBox, the following code is used to listen to focus events on the SuggestBox's underlying widget.

  public void addFocusListener(FocusListener listener) {
    if (focusListeners == null) {
      focusListeners = new DelegatingFocusListenerCollection(this, box);
    }
    focusListeners.add(listener);
  }

See Also:: Serialized Form

Field Summary

Fields inherited from class java.util.AbstractList
`modCount`

Constructor Summary
`DelegatingFocusListenerCollection(Widget owner, SourcesFocusEvents delegatedTo)` Deprecated. Constructor for `DelegatingFocusListenerCollection`.

Method Summary
`void`	`onFocus(Widget sender)` Deprecated. Fired when a widget receives keyboard focus.
`void`	`onLostFocus(Widget sender)` Deprecated. Fired when a widget loses keyboard focus.

Methods inherited from class com.google.gwt.user.client.ui.FocusListenerCollection
`fireFocus, fireFocusEvent, fireLostFocus`

Methods inherited from class java.util.ArrayList
`add, add, addAll, addAll, clear, clone, contains, ensureCapacity, get, indexOf, isEmpty, lastIndexOf, remove, remove, removeRange, set, size, toArray, toArray, trimToSize`

Methods inherited from class java.util.AbstractList
`equals, hashCode, iterator, listIterator, listIterator, subList`

Methods inherited from class java.util.AbstractCollection
`containsAll, removeAll, retainAll, toString`

Methods inherited from class java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Methods inherited from interface java.util.List
`containsAll, equals, hashCode, iterator, listIterator, listIterator, removeAll, retainAll, subList`

Constructor Detail