public class ContainerEvent extends ComponentEvent
Container events are provided for notification purposes ONLY; The AWT will automatically handle changes to the containers contents internally so that the program works properly regardless of whether the program is receiving these events or not.
This low-level event is generated by a container object (such as a
Panel) when a component is added to it or removed from it.
The event is passed to every ContainerListener
or ContainerAdapter object which registered to receive such
events using the component's addContainerListener method.
(ContainerAdapter objects implement the
ContainerListener interface.) Each such listener object
gets this ContainerEvent when the event occurs.
An unspecified behavior will be caused if the id parameter
of any particular ContainerEvent instance is not
in the range from CONTAINER_FIRST to CONTAINER_LAST.
ContainerAdapter,
ContainerListener,
Tutorial: Writing a Container Listener,
Serialized Form| Modifier and Type | Field and Description |
|---|---|
static int |
COMPONENT_ADDED
This event indicates that a component was added to the container.
|
static int |
COMPONENT_REMOVED
This event indicates that a component was removed from the container.
|
static int |
CONTAINER_FIRST
The first number in the range of ids used for container events.
|
static int |
CONTAINER_LAST
The last number in the range of ids used for container events.
|
COMPONENT_FIRST, COMPONENT_HIDDEN, COMPONENT_LAST, COMPONENT_MOVED, COMPONENT_RESIZED, COMPONENT_SHOWNACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, consumed, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, id, INPUT_METHOD_EVENT_MASK, INVOCATION_EVENT_MASK, ITEM_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, PAINT_EVENT_MASK, RESERVED_ID_MAX, TEXT_EVENT_MASK, WINDOW_EVENT_MASK, WINDOW_FOCUS_EVENT_MASK, WINDOW_STATE_EVENT_MASKsource| Constructor and Description |
|---|
ContainerEvent(Component source,
int id,
Component child)
Constructs a
ContainerEvent object. |
| Modifier and Type | Method and Description |
|---|---|
Component |
getChild()
Returns the component that was affected by the event.
|
Container |
getContainer()
Returns the originator of the event.
|
String |
paramString()
Returns a parameter string identifying this event.
|
getComponentgetSourcepublic static final int CONTAINER_FIRST
public static final int CONTAINER_LAST
public static final int COMPONENT_ADDED
public static final int COMPONENT_REMOVED
public ContainerEvent(Component source, int id, Component child)
ContainerEvent object.
This method throws an
IllegalArgumentException if source
is null.
source - The Component object (container)
that originated the eventid - An integer indicating the type of event.
For information on allowable values, see
the class description for ContainerEventchild - the component that was added or removedIllegalArgumentException - if source is nullgetContainer(),
AWTEvent.getID(),
getChild()public Container getContainer()
Container object that originated
the event, or null if the object is not a
Container.public Component getChild()
public String paramString()
paramString in class ComponentEvent Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2011, Oracle and/or its affiliates. All rights reserved.
DRAFT ea-b138