uk.ac.starlink.datanode.tree

Class BasicDropHandler

java.lang.Object

java.awt.dnd.DropTarget

uk.ac.starlink.datanode.tree.BasicDropHandler

All Implemented Interfaces:

DropTargetListener, Serializable, EventListener

public class BasicDropHandler
extends DropTarget

Custom DropTarget subclass. This provides basic DropTarget/DropTargetListener functionality for use with components which want to define their own drop behaviour. An instance of this class can be slotted into a JComponent using its Component.setDropTarget(java.awt.dnd.DropTarget) method to override the one which is installed with it (which probably comes from the basic UI).

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.awt.dnd.DropTarget

DropTarget.DropTargetAutoScroller

Constructor Summary

Constructors

Constructor and Description
BasicDropHandler(JComponent comp) Constructs a new drop handler for use with a given component.

Method Summary

Modifier and Type	Method and Description
void	dragEnter(DropTargetDragEvent evt)
void	dragExit(DropTargetEvent evt)
void	dragOver(DropTargetDragEvent evt)
void	drop(DropTargetDropEvent evt)
protected boolean	isDropLocation(Point loc) Indicates whether a given location is permissible for a drop event.

Methods inherited from class java.awt.dnd.DropTarget

addDropTargetListener, addNotify, clearAutoscroll, createDropTargetAutoScroller, createDropTargetContext, dropActionChanged, getComponent, getDefaultActions, getDropTargetContext, getFlavorMap, initializeAutoscrolling, isActive, removeDropTargetListener, removeNotify, setActive, setComponent, setDefaultActions, setFlavorMap, updateAutoscroll

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BasicDropHandler

public BasicDropHandler(JComponent comp)

Constructs a new drop handler for use with a given component.

Parameters:

comp - the component which this drop handler will control

Method Detail

dragEnter

public void dragEnter(DropTargetDragEvent evt)

Specified by:

dragEnter in interface DropTargetListener

Overrides:

dragEnter in class DropTarget

dragOver

public void dragOver(DropTargetDragEvent evt)

Specified by:

dragOver in interface DropTargetListener

Overrides:

dragOver in class DropTarget

dragExit

public void dragExit(DropTargetEvent evt)

Specified by:

dragExit in interface DropTargetListener

Overrides:

dragExit in class DropTarget

drop

public void drop(DropTargetDropEvent evt)

Specified by:

drop in interface DropTargetListener

Overrides:

drop in class DropTarget

isDropLocation

protected boolean isDropLocation(Point loc)

Indicates whether a given location is permissible for a drop event.

Parameters:

loc - the point at which a drop might take place

Returns:

true iff it's OK to drop at loc