java.awt.dnd
Class DropTargetAdapter

java.lang.Object sample code for java.lang.Object definition code for java.lang.Object 
  extended by java.awt.dnd.DropTargetAdapter
All Implemented Interfaces:
DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.DropTargetListener , EventListener sample code for java.util.EventListener definition code for java.util.EventListener

public abstract class DropTargetAdapter
extends Object sample code for java.lang.Object definition code for java.lang.Object
implements DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.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.

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:
DropTargetEvent sample code for java.awt.dnd.DropTargetEvent definition code for java.awt.dnd.DropTargetEvent , DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.DropTargetListener

Constructor Summary
DropTargetAdapter sample code for java.awt.dnd.DropTargetAdapter.DropTargetAdapter() definition code for java.awt.dnd.DropTargetAdapter.DropTargetAdapter() ()
           
 
Method Summary
 void dragEnter sample code for java.awt.dnd.DropTargetAdapter.dragEnter(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetAdapter.dragEnter(java.awt.dnd.DropTargetDragEvent) (DropTargetDragEvent sample code for java.awt.dnd.DropTargetDragEvent definition code for java.awt.dnd.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 sample code for java.awt.dnd.DropTargetAdapter.dragExit(java.awt.dnd.DropTargetEvent) definition code for java.awt.dnd.DropTargetAdapter.dragExit(java.awt.dnd.DropTargetEvent) (DropTargetEvent sample code for java.awt.dnd.DropTargetEvent definition code for java.awt.dnd.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 sample code for java.awt.dnd.DropTargetAdapter.dragOver(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetAdapter.dragOver(java.awt.dnd.DropTargetDragEvent) (DropTargetDragEvent sample code for java.awt.dnd.DropTargetDragEvent definition code for java.awt.dnd.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 sample code for java.awt.dnd.DropTargetAdapter.dropActionChanged(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetAdapter.dropActionChanged(java.awt.dnd.DropTargetDragEvent) (DropTargetDragEvent sample code for java.awt.dnd.DropTargetDragEvent definition code for java.awt.dnd.DropTargetDragEvent  dtde)
          Called if the user has modified the current drop gesture.
 
Methods inherited from class java.lang.Object sample code for java.lang.Object definition code for java.lang.Object
clone sample code for java.lang.Object.clone() definition code for java.lang.Object.clone() , equals sample code for java.lang.Object.equals(java.lang.Object) definition code for java.lang.Object.equals(java.lang.Object) , finalize sample code for java.lang.Object.finalize() definition code for java.lang.Object.finalize() , getClass sample code for java.lang.Object.getClass() definition code for java.lang.Object.getClass() , hashCode sample code for java.lang.Object.hashCode() definition code for java.lang.Object.hashCode() , notify sample code for java.lang.Object.notify() definition code for java.lang.Object.notify() , notifyAll sample code for java.lang.Object.notifyAll() definition code for java.lang.Object.notifyAll() , toString sample code for java.lang.Object.toString() definition code for java.lang.Object.toString() , wait sample code for java.lang.Object.wait() definition code for java.lang.Object.wait() , wait sample code for java.lang.Object.wait(long) definition code for java.lang.Object.wait(long) , wait sample code for java.lang.Object.wait(long, int) definition code for java.lang.Object.wait(long, int)
 
Methods inherited from interface java.awt.dnd.DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.DropTargetListener
drop sample code for java.awt.dnd.DropTargetListener.drop(java.awt.dnd.DropTargetDropEvent) definition code for java.awt.dnd.DropTargetListener.drop(java.awt.dnd.DropTargetDropEvent)
 

Constructor Detail

DropTargetAdapter sample code for java.awt.dnd.DropTargetAdapter() definition code for java.awt.dnd.DropTargetAdapter()

public DropTargetAdapter()
Method Detail

dragEnter sample code for java.awt.dnd.DropTargetAdapter.dragEnter(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetAdapter.dragEnter(java.awt.dnd.DropTargetDragEvent)

public void dragEnter(DropTargetDragEvent sample code for java.awt.dnd.DropTargetDragEvent definition code for java.awt.dnd.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 sample code for java.awt.dnd.DropTargetListener.dragEnter(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetListener.dragEnter(java.awt.dnd.DropTargetDragEvent) in interface DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.DropTargetListener
Parameters:
dtde - the DropTargetDragEvent

dragOver sample code for java.awt.dnd.DropTargetAdapter.dragOver(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetAdapter.dragOver(java.awt.dnd.DropTargetDragEvent)

public void dragOver(DropTargetDragEvent sample code for java.awt.dnd.DropTargetDragEvent definition code for java.awt.dnd.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 sample code for java.awt.dnd.DropTargetListener.dragOver(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetListener.dragOver(java.awt.dnd.DropTargetDragEvent) in interface DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.DropTargetListener
Parameters:
dtde - the DropTargetDragEvent

dropActionChanged sample code for java.awt.dnd.DropTargetAdapter.dropActionChanged(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetAdapter.dropActionChanged(java.awt.dnd.DropTargetDragEvent)

public void dropActionChanged(DropTargetDragEvent sample code for java.awt.dnd.DropTargetDragEvent definition code for java.awt.dnd.DropTargetDragEvent  dtde)
Called if the user has modified the current drop gesture.

Specified by:
dropActionChanged sample code for java.awt.dnd.DropTargetListener.dropActionChanged(java.awt.dnd.DropTargetDragEvent) definition code for java.awt.dnd.DropTargetListener.dropActionChanged(java.awt.dnd.DropTargetDragEvent) in interface DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.DropTargetListener
Parameters:
dtde - the DropTargetDragEvent

dragExit sample code for java.awt.dnd.DropTargetAdapter.dragExit(java.awt.dnd.DropTargetEvent) definition code for java.awt.dnd.DropTargetAdapter.dragExit(java.awt.dnd.DropTargetEvent)

public void dragExit(DropTargetEvent sample code for java.awt.dnd.DropTargetEvent definition code for java.awt.dnd.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 sample code for java.awt.dnd.DropTargetListener.dragExit(java.awt.dnd.DropTargetEvent) definition code for java.awt.dnd.DropTargetListener.dragExit(java.awt.dnd.DropTargetEvent) in interface DropTargetListener sample code for java.awt.dnd.DropTargetListener definition code for java.awt.dnd.DropTargetListener
Parameters:
dte - the DropTargetEvent