edu.umd.cs.jazz.event
Class ZEventHandler

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

Direct Known Subclasses:

ZLinkEventHandler, ZNavEventHandlerKeyBoard, ZoomEventHandlerRightButton, ZPanEventHandler, ZSelectionEventHandler

public abstract class ZEventHandler

extends java.lang.Object

ZEventHandler is an abstract class for defining behaviors in Jazz. It is really just a utility class to make it easier to group sets of event handlers that work together to define a behavior. This defines event listeners for mouse and keyboard events so that a sub-class can over-ride the ones it wants to define. Then, the entire set of handles can be temporarily turned on or off with calls to activate or deactivate. This functionality is specifically designed for mode-driven applications so that one mode might draw while another follows hyperlinks. One event handler can be defined for each mode, and then they just need to be activated and deactivated as needed.

See Also:

ZSurface

Field Summary

protected boolean	activated
protected java.awt.Component	component
protected java.awt.event.KeyAdapter	keyAdapter
protected java.awt.event.MouseAdapter	mouseAdapter
protected java.awt.event.MouseMotionAdapter	mouseMotionAdapter
protected ZSurface	surface

Constructor Summary

ZEventHandler(java.awt.Component c, ZSurface v)
Constructs a new ZEventHandler.

Method Summary

void	activate() Activates this event handler.
void	deactivate() Deactivates this event handler.
ZCamera	getCamera() Returns the camera that this event handler is associated with.
java.awt.Component	getComponent() Returns the component that this event handler is associated with.
ZSurface	getSurface() Returns the surface that this event handler is associated with.
void	keyPressed(java.awt.event.KeyEvent e)
void	keyReleased(java.awt.event.KeyEvent e)
void	keyTyped(java.awt.event.KeyEvent e)
void	mouseDragged(java.awt.event.MouseEvent e)
void	mouseMoved(java.awt.event.MouseEvent e)
void	mousePressed(java.awt.event.MouseEvent e)
void	mouseReleased(java.awt.event.MouseEvent e)

Methods inherited from class java.lang.Object

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

Field Detail

activated

protected boolean activated

component

protected java.awt.Component component

surface

protected ZSurface surface

keyAdapter

protected java.awt.event.KeyAdapter keyAdapter

mouseAdapter

protected java.awt.event.MouseAdapter mouseAdapter

mouseMotionAdapter

protected java.awt.event.MouseMotionAdapter mouseMotionAdapter

Constructor Detail

ZEventHandler

public ZEventHandler(java.awt.Component c,
                     ZSurface v)

Constructs a new ZEventHandler.

Parameters:

c - The component that this event handler listens to events on

v - The surface that is panned

Method Detail

keyPressed

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

keyReleased

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

keyTyped

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

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent e)

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent e)

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent e)

activate

public void activate()

Activates this event handler.

See Also:

deactivate()

deactivate

public void deactivate()

Deactivates this event handler.

See Also:

activate()

getCamera

public ZCamera getCamera()

Returns the camera that this event handler is associated with.

Returns:

The camera.

getSurface

public ZSurface getSurface()

Returns the surface that this event handler is associated with.

Returns:

The surface.

getComponent

public java.awt.Component getComponent()

Returns the component that this event handler is associated with.

Returns:

The component.