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, Serializable, Cloneable, Iterable<FocusListener>, Collection<FocusListener>, EventListener, List<FocusListener>, 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

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

Constructors

Constructor and Description
DelegatingFocusListenerCollection(Widget owner, SourcesFocusEvents delegatedTo) Deprecated. Constructor for DelegatingFocusListenerCollection.

Method Summary

Modifier and Type	Method and Description
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, forEach, get, indexOf, isEmpty, iterator, lastIndexOf, remove, remove, removeIf, removeRange, replaceAll, set, size, sort, toArray, toArray, trimToSize

Methods inherited from class java.util.AbstractList

equals, hashCode, listIterator, listIterator, subList

Methods inherited from class java.util.AbstractCollection

containsAll, removeAll, retainAll, toString

Methods inherited from class java.lang.Object

finalize, getClass

Methods inherited from interface java.util.List

listIterator, listIterator, spliterator, subList

Methods inherited from interface java.util.Collection

containsAll, parallelStream, removeAll, retainAll, stream

Constructor Detail

DelegatingFocusListenerCollection

public DelegatingFocusListenerCollection(Widget owner,
                                         SourcesFocusEvents delegatedTo)

Deprecated.

Constructor for DelegatingFocusListenerCollection. *

Parameters:

owner - owner of listeners

delegatedTo - source of events

Method Detail

onFocus

public void onFocus(Widget sender)

Deprecated.

Description copied from interface: FocusListener

Fired when a widget receives keyboard focus.

Specified by:

onFocus in interface FocusListener

Parameters:

sender - the widget receiving focus.

onLostFocus

public void onLostFocus(Widget sender)

Deprecated.

Description copied from interface: FocusListener

Fired when a widget loses keyboard focus.

Specified by:

onLostFocus in interface FocusListener

Parameters:

sender - the widget losing focus.