@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);
}
| Constructor and Description |
|---|
DelegatingFocusListenerCollection(Widget owner,
SourcesFocusEvents delegatedTo)
Deprecated.
Constructor for
DelegatingFocusListenerCollection. |
| 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.
|
fireFocus, fireFocusEvent, fireLostFocusadd, add, addAll, addAll, clear, clone, contains, ensureCapacity, get, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeRange, retainAll, set, size, subList, toArray, toArray, trimToSizepublic DelegatingFocusListenerCollection(Widget owner, SourcesFocusEvents delegatedTo)
DelegatingFocusListenerCollection. *owner - owner of listenersdelegatedTo - source of eventspublic void onFocus(Widget sender)
FocusListeneronFocus in interface FocusListenersender - the widget receiving focus.public void onLostFocus(Widget sender)
FocusListeneronLostFocus in interface FocusListenersender - the widget losing focus.