org.kepler.gui

Class CanvasDropTargetListener

java.lang.Object

org.kepler.gui.CanvasDropTargetListener

All Implemented Interfaces:

java.awt.dnd.DropTargetListener, java.util.EventListener

public class CanvasDropTargetListener
extends java.lang.Object
implements java.awt.dnd.DropTargetListener

This class allows any class that wants to listen for canvas drop events to register a listener without having a direct reference to the canvas (BasicGraphFrame) itself.

Since:

Jan. 4, 2007, Kepler 1.0

Author:

Chad Berkley

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CanvasDropTargetListener()

Method Summary

Modifier and Type	Method and Description
void	dragEnter(java.awt.dnd.DropTargetDragEvent dtde) called when a drag enters the canvas
void	dragExit(java.awt.dnd.DropTargetEvent dtde) called when a drag exits the canvas
void	dragOver(java.awt.dnd.DropTargetDragEvent dtde) called when the drag moves over the canvas
void	drop(java.awt.dnd.DropTargetDropEvent dtde) called when a drag is dropped over the canvas
void	dropActionChanged(java.awt.dnd.DropTargetDragEvent dtde) called when a drag action changes
static CanvasDropTargetListener	getInstance() returns a singleton instance of this listener
void	registerListener(java.awt.dnd.DropTargetListener l) register a listener to listen to this listener. in this way, any class can get an instance of this listener without having to get a reference to the Canvas, then listen for canvas events

Methods inherited from class java.lang.Object

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

Constructor Detail

CanvasDropTargetListener

protected CanvasDropTargetListener()

Method Detail

getInstance

public static CanvasDropTargetListener getInstance()

returns a singleton instance of this listener

registerListener

public void registerListener(java.awt.dnd.DropTargetListener l)

register a listener to listen to this listener. in this way, any class can get an instance of this listener without having to get a reference to the Canvas, then listen for canvas events

dragEnter

public void dragEnter(java.awt.dnd.DropTargetDragEvent dtde)

called when a drag enters the canvas

Specified by:

dragEnter in interface java.awt.dnd.DropTargetListener

dragExit

public void dragExit(java.awt.dnd.DropTargetEvent dtde)

called when a drag exits the canvas

Specified by:

dragExit in interface java.awt.dnd.DropTargetListener

dragOver

public void dragOver(java.awt.dnd.DropTargetDragEvent dtde)

called when the drag moves over the canvas

Specified by:

dragOver in interface java.awt.dnd.DropTargetListener

drop

public void drop(java.awt.dnd.DropTargetDropEvent dtde)

called when a drag is dropped over the canvas

Specified by:

drop in interface java.awt.dnd.DropTargetListener

dropActionChanged

public void dropActionChanged(java.awt.dnd.DropTargetDragEvent dtde)

called when a drag action changes

Specified by:

dropActionChanged in interface java.awt.dnd.DropTargetListener