DropTargetAdapter (Java 2 Platform SE v1.4.1_"07")

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JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

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## java.awt.dnd
Class DropTargetAdapter

    java.lang.Object
      |
      +--java.awt.dnd.DropTargetAdapter

All Implemented Interfaces:
  DropTargetListener, EventListener

public abstract class DropTargetAdapter
extends Object
implements DropTargetListener

An abstract adapter class for receiving drop target events. The methods in this class are empty. This class exists only as a convenience for creating listener objects.

Extend this class to create a `DropTargetEvent` listener and override the methods for the events of interest. (If you implement the `DropTargetListener` interface, you have to define all of the methods in it. This abstract class defines a null implementation for every method except `drop(DropTargetDropEvent)`, so you only have to define methods for events you care about.) You must provide an implementation for at least `drop(DropTargetDropEvent)`. This method cannot have a null implementation because its specification requires that you either accept or reject the drop, and, if accepted, indicate whether the drop was successful.

Create a listener object using the extended class and then register it with a `DropTarget`. When the drag enters, moves over, or exits the operable part of the drop site for that `DropTarget`, when the drop action changes, and when the drop occurs, the relevant method in the listener object is invoked, and the `DropTargetEvent` is passed to it.

The operable part of the drop site for the `DropTarget` is the part of the associated `Component`'s geometry that is not obscured by an overlapping top-level window or by another `Component` higher in the Z-order that has an associated active `DropTarget`.

Since:
  1.4
See Also:
  `DropTargetEvent`, `DropTargetListener`

Constructor Summary
`DropTargetAdapter()`

Method Summary
`void` | `dragEnter(DropTargetDragEvent dtde)` Called while a drag operation is ongoing, when the mouse pointer enters the operable part of the drop site for the `DropTarget` registered with this listener.
`void` | `dragExit(DropTargetEvent dte)` Called while a drag operation is ongoing, when the mouse pointer has exited the operable part of the drop site for the `DropTarget` registered with this listener.
`void` | `dragOver(DropTargetDragEvent dtde)` Called when a drag operation is ongoing, while the mouse pointer is still over the operable part of the drop site for the `DropTarget` registered with this listener.
`void` | `dropActionChanged(DropTargetDragEvent dtde)` Called if the user has modified the current drop gesture.

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

Methods inherited from interface java.awt.dnd.DropTargetListener
`drop`

Constructor Detail

### DropTargetAdapter

    public DropTargetAdapter()

Method Detail

### dragEnter

    public void dragEnter(DropTargetDragEvent dtde)

  Called while a drag operation is ongoing, when the mouse pointer enters the operable part of the drop site for the `DropTarget` registered with this listener.

  Specified by:
    `dragEnter` in interface `DropTargetListener`
  Parameters:
    `dtde` - the `DropTargetDragEvent`

### dragOver

    public void dragOver(DropTargetDragEvent dtde)

  Called when a drag operation is ongoing, while the mouse pointer is still over the operable part of the drop site for the `DropTarget` registered with this listener.

  Specified by:
    `dragOver` in interface `DropTargetListener`
  Parameters:
    `dtde` - the `DropTargetDragEvent`

### dropActionChanged

    public void dropActionChanged(DropTargetDragEvent dtde)

  Called if the user has modified the current drop gesture.

  Specified by:
    `dropActionChanged` in interface `DropTargetListener`
  Parameters:
    `dtde` - the `DropTargetDragEvent`

### dragExit

    public void dragExit(DropTargetEvent dte)

  Called while a drag operation is ongoing, when the mouse pointer has exited the operable part of the drop site for the `DropTarget` registered with this listener.

  Specified by:
    `dragExit` in interface `DropTargetListener`
  Parameters:
    `dte` - the `DropTargetEvent`

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JavaTM 2 Platform
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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.