public interface Listener
Listener provide a simple
handleEvent() method that is used internally
by SWT to dispatch events.
After creating an instance of a class that implements this interface
it can be added to a widget using the
addListener(int eventType, Listener handler) method and
removed using the
removeListener (int eventType, Listener handler) method.
When the specified event occurs, handleEvent(...) will
be sent to the instance.
Classes which implement this interface are described within SWT as
providing the untyped listener API. Typically, widgets will
also provide a higher-level typed listener API, that is based
on the standard java.util.EventListener pattern.
Note that, since all internal SWT event dispatching is based on untyped listeners, it is simple to build subsets of SWT for use on memory constrained, small footprint devices, by removing the classes and methods which implement the typed listener API.
Widget.addListener(int, org.eclipse.swt.widgets.Listener),
EventListener,
org.eclipse.swt.events| Modifier and Type | Method and Description |
|---|---|
void |
handleEvent(Event event)
Sent when an event that the receiver has registered for occurs.
|
void handleEvent(Event event)
event - the event which occurred