edu.umd.cs.jazz.event
Class ZSelectionDeleteHandler

java.lang.Object
  |
  +--edu.umd.cs.jazz.event.ZSelectionDeleteHandler

All Implemented Interfaces:

java.util.EventListener, java.awt.event.KeyListener, java.io.Serializable, ZEventHandler

public class ZSelectionDeleteHandler

extends java.lang.Object

implements ZEventHandler, java.awt.event.KeyListener, java.io.Serializable

ZSelectionDeleteHandler is a selection handler for use with a ZSelectionManager. ZSelectionDeleteHandler allows the user to delete the current selection by pressing the DEL key.

ZSelectionDeleteHandler also allows registration of ZGroupListener instances to be notified when items are deleted.

Warning: Serialized and ZSerialized objects of this class will not be compatible with future Jazz releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Jazz. A future release of Jazz will provide support for long term persistence.

Author:

Antony Courtney, Yale University, Lance Good, Univesity of Maryland, Benjamin Bederson, University of Maryland

See Also:

ZSelectionManager, ZCompositeSelectionHandler, Serialized Form

Field Summary

protected javax.swing.event.EventListenerList

listenerList registered event listeners

Constructor Summary

ZSelectionDeleteHandler(ZNode node, ZCamera camera, ZCanvas canvas)
Construct a new ZSelectionDeleteHandler.

ZSelectionDeleteHandler(ZNode node, ZCanvas canvas)
Construct a new ZSelectionDeleteHandler.

Method Summary

void	addGroupListener(ZGroupListener l) Add a ZGroupListener, registered for nodeRemoved events.
protected void	fireGroupEvent(int id, ZGroup parent, ZNode child) Notifies all listeners that have registered interest for notification on this event type.
boolean	isActive() Determines if this event handler is active.
void	keyPressed(java.awt.event.KeyEvent e) Key press event handler
void	keyReleased(java.awt.event.KeyEvent e) Key release event handler
void	keyTyped(java.awt.event.KeyEvent e) Key typed event handler
void	removeGroupListener(ZGroupListener l) Remove a ZGroupListener, registered for nodeRemoved events.
void	setActive(boolean active) Specifies whether this event handler is active

Methods inherited from class java.lang.Object

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

Field Detail

listenerList

protected transient javax.swing.event.EventListenerList listenerList

registered event listeners

Constructor Detail

ZSelectionDeleteHandler

public ZSelectionDeleteHandler(ZNode node,
                               ZCanvas canvas)

Construct a new ZSelectionDeleteHandler. Uses the canvas' camera in obtaining selected nodes.

Parameters:

node - The node this delete handler attaches to

canvas - The canvas this handler is active on

ZSelectionDeleteHandler

public ZSelectionDeleteHandler(ZNode node,
                               ZCamera camera,
                               ZCanvas canvas)

Construct a new ZSelectionDeleteHandler.

Parameters:

node - The node this delete handler attaches to

camera - The camera this delete handler attaches to

canvas - The canvas this handler is active on

Method Detail

setActive

public void setActive(boolean active)

Specifies whether this event handler is active

Specified by:

setActive in interface ZEventHandler

Parameters:

active - True to make this event handler active

isActive

public boolean isActive()

Determines if this event handler is active.

Specified by:

isActive in interface ZEventHandler

Returns:

True if active

addGroupListener

public void addGroupListener(ZGroupListener l)

Add a ZGroupListener, registered for nodeRemoved events.

removeGroupListener

public void removeGroupListener(ZGroupListener l)

Remove a ZGroupListener, registered for nodeRemoved events.

fireGroupEvent

protected void fireGroupEvent(int id,
                              ZGroup parent,
                              ZNode child)

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method. The listener list is processed in last to first order.

Parameters:

id - The event id (NODE_ADDED, NODE_REMOVED)

child - The child being added or removed from this node

See Also:

EventListenerList

keyPressed

public void keyPressed(java.awt.event.KeyEvent e)

Key press event handler

Specified by:

keyPressed in interface java.awt.event.KeyListener

Parameters:

e - The event.

keyReleased

public void keyReleased(java.awt.event.KeyEvent e)

Key release event handler

Specified by:

keyReleased in interface java.awt.event.KeyListener

Parameters:

e - The event.

keyTyped

public void keyTyped(java.awt.event.KeyEvent e)

Key typed event handler

Specified by:

keyTyped in interface java.awt.event.KeyListener

Parameters:

e - The event.