Class DropTargetAdapter
- All Implemented Interfaces:
- DropTargetListener,- EventListener
 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.
 
 During the drag, the data associated with the current drag operation can be
 retrieved by calling getTransferable() on
 DropTargetDragEvent instances passed to the listener's
 methods.
 
 Note that getTransferable() on the
 DropTargetDragEvent instance should only be called within the
 respective listener's method and all the necessary data should be retrieved
 from the returned Transferable before that method returns.
- Since:
- 1.4
- See Also:
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionvoiddragEnter(DropTargetDragEvent dtde) Called while a drag operation is ongoing, when the mouse pointer enters the operable part of the drop site for theDropTargetregistered with this listener.voiddragExit(DropTargetEvent dte) Called while a drag operation is ongoing, when the mouse pointer has exited the operable part of the drop site for theDropTargetregistered with this listener.voiddragOver(DropTargetDragEvent dtde) Called when a drag operation is ongoing, while the mouse pointer is still over the operable part of the drop site for theDropTargetregistered with this listener.voidCalled if the user has modified the current drop gesture.Methods declared in class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods declared in interface java.awt.dnd.DropTargetListenerdrop
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Constructor Details- 
DropTargetAdapterprotected DropTargetAdapter()Constructs aDropTargetAdapter.
 
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Method Details- 
dragEnterCalled while a drag operation is ongoing, when the mouse pointer enters the operable part of the drop site for theDropTargetregistered with this listener.- Specified by:
- dragEnterin interface- DropTargetListener
- Parameters:
- dtde- the- DropTargetDragEvent
 
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dragOverCalled when a drag operation is ongoing, while the mouse pointer is still over the operable part of the drop site for theDropTargetregistered with this listener.- Specified by:
- dragOverin interface- DropTargetListener
- Parameters:
- dtde- the- DropTargetDragEvent
 
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dropActionChangedCalled if the user has modified the current drop gesture.- Specified by:
- dropActionChangedin interface- DropTargetListener
- Parameters:
- dtde- the- DropTargetDragEvent
 
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dragExitCalled while a drag operation is ongoing, when the mouse pointer has exited the operable part of the drop site for theDropTargetregistered with this listener.- Specified by:
- dragExitin interface- DropTargetListener
- Parameters:
- dte- the- DropTargetEvent
 
 
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