edu.umd.cs.jazz.event
Class ZSelectionScaleHandler

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

All Implemented Interfaces:

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

public class ZSelectionScaleHandler

extends java.lang.Object

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

ZSelectionScaleHandler is a selection handler for use with a ZSelectionManager. ZSelectionScaleHandler allows the user to scale the current selection using the PgUp / PgDn keys.

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, University of Maryland, Benjamin Bederson, University of Maryland

See Also:

ZSelectionManager, ZCompositeSelectionHandler, Serialized Form

Constructor Summary

ZSelectionScaleHandler(ZCamera camera, ZCanvas canvas)
Construct a new ZSelectionScaleHandler.

ZSelectionScaleHandler(ZCanvas canvas)
Construct a new ZSelectionScaleHandler.

Method Summary

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	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

Constructor Detail

ZSelectionScaleHandler

public ZSelectionScaleHandler(ZCanvas canvas)

Construct a new ZSelectionScaleHandler. This event handler operates only on the canvas' camera.

Parameters:

node - The node this event handler attaches to

canvas - The canvas on which this event handler is active

ZSelectionScaleHandler

public ZSelectionScaleHandler(ZCamera camera,
                              ZCanvas canvas)

Construct a new ZSelectionScaleHandler. This event handler only operates on the specified camera.

Parameters:

node - The node this event handler attaches to

camera - The camera on which this event handler operates

canvas - The canvas on which this event handler is active

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

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.