diva.graph.schematic

Class GraphDropTarget

java.lang.Object

java.awt.dnd.DropTarget

diva.graph.schematic.GraphDropTarget

All Implemented Interfaces:

DropTargetListener, Serializable, EventListener

public class GraphDropTarget
extends DropTarget

This class provides customizable drag-and-drop support for the graph editor widget. Users can register string keys and object values that get cloned when the keys are dropped onto the graph editor. When a drop occurs, the graph controller is asked to create a node instance with the value as its semantic object.

Version:

$Revision: 1.4 $

Author:

Michael Shilman (michaels@eecs.berkeley.edu)

See Also:

Serialized Form

Nested Class Summary

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

DropTarget.DropTargetAutoScroller

Field Summary

Fields

Modifier and Type	Field and Description
HashMap	_map A hastable to store the key->figure mapping.

Constructor Summary

Constructors

Constructor and Description
GraphDropTarget(JGraph g) Construct a new graph target to operate on the given JGraph.

Method Summary

Modifier and Type	Method and Description
void	addDropKey(String key, Object val) Add a key to the drop target so that when they key is dropped the figure will be cloned and placed as a node in the graph.
void	removeDropKey(String key) Remove a key from the target.

Methods inherited from class java.awt.dnd.DropTarget

addDropTargetListener, addNotify, clearAutoscroll, createDropTargetAutoScroller, createDropTargetContext, dragEnter, dragExit, dragOver, drop, 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

Field Detail

_map

public HashMap _map

A hastable to store the key->figure mapping.

Constructor Detail

GraphDropTarget

public GraphDropTarget(JGraph g)

Construct a new graph target to operate on the given JGraph.

Method Detail

addDropKey

public void addDropKey(String key,
                       Object val)

Add a key to the drop target so that when they key is dropped the figure will be cloned and placed as a node in the graph. Key must be a unique string.

removeDropKey

public void removeDropKey(String key)

Remove a key from the target.

See Also:

addDropKey(String,Figure)