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## javax.swing.event
Class AncestorEvent

    java.lang.Object
      |
      +--java.util.EventObject
            |
            +--java.awt.AWTEvent
                  |
                  +--javax.swing.event.AncestorEvent

All Implemented Interfaces:
  Serializable

public class AncestorEvent
extends AWTEvent

An event reported to a child component that originated from an ancestor in the component hierarchy.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the `java.beans` package. Please see `XMLEncoder`.

Field Summary
`static int` | `ANCESTOR_ADDED` An ancestor-component was added to the hierarchy of visible objects (made visible), and is currently being displayed.
`static int` | `ANCESTOR_MOVED` An ancestor-component changed its position on the screen.
`static int` | `ANCESTOR_REMOVED` An ancestor-component was removed from the hierarchy of visible objects (hidden) and is no longer being displayed.

Fields inherited from class java.awt.AWTEvent
`ACTION_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_MASK`

Fields inherited from class java.util.EventObject
`source`

Constructor Summary
`AncestorEvent(JComponent source, int id, Container ancestor, Container ancestorParent)` Constructs an AncestorEvent object to identify a change in an ancestor-component's display-status.

Method Summary
`Container` | `getAncestor()` Returns the ancestor that the event actually occurred on.
`Container` | `getAncestorParent()` Returns the parent of the ancestor the event actually occurred on.
`JComponent` | `getComponent()` Returns the component that the listener was added to.

Methods inherited from class java.awt.AWTEvent
`consume, getID, isConsumed, paramString, setSource, toString`

Methods inherited from class java.util.EventObject
`getSource`

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

Field Detail

### ANCESTOR_ADDED

    public static final int ANCESTOR_ADDED

  An ancestor-component was added to the hierarchy of visible objects (made visible), and is currently being displayed.

  See Also:
    Constant Field Values

### ANCESTOR_REMOVED

    public static final int ANCESTOR_REMOVED

  An ancestor-component was removed from the hierarchy of visible objects (hidden) and is no longer being displayed.

  See Also:
    Constant Field Values

### ANCESTOR_MOVED

    public static final int ANCESTOR_MOVED

  An ancestor-component changed its position on the screen.

  See Also:
    Constant Field Values

Constructor Detail

### AncestorEvent

    public AncestorEvent(JComponent source,
                         int id,
                         Container ancestor,
                         Container ancestorParent)

  Constructs an AncestorEvent object to identify a change in an ancestor-component's display-status.

Parameters:
  `source` - the JComponent that originated the event (typically `this`)
  `id` - an int specifying `ANCESTOR_ADDED`, `ANCESTOR_REMOVED` or `ANCESTOR_MOVED`
  `ancestor` - a Container object specifying the ancestor-component whose display-status changed
  `ancestorParent` - a Container object specifying the ancestor's parent

Method Detail

### getAncestor

    public Container getAncestor()

  Returns the ancestor that the event actually occurred on.

### getAncestorParent

    public Container getAncestorParent()

  Returns the parent of the ancestor the event actually occurred on. This is most interesting in an ANCESTOR_REMOVED event, as the ancestor may no longer be in the component hierarchy.

### getComponent

    public JComponent getComponent()

  Returns the component that the listener was added to.

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.