Package event

Class MultiKeyListener

java.lang.Object

java.awt.event.KeyAdapter

event.MultiKeyListener

All Implemented Interfaces:

Configuration, KeyListener, EventListener

public class MultiKeyListener
extends KeyAdapter
implements Configuration

This class maintains a synchronized set of active keys. The KeyEvent.keyCode corresponding to the depressed key is added to the set when keyPressed is invoked, and removed from the set when keyReleased is invoked. When polled (getActiveKeys() is invoked), an array of the key codes of all depressed keys is returned.

Author:

Krish Pillai

See Also:

• KeyEvent.getKeyCode()

Nested Class Summary

Nested classes/interfaces inherited from interface common.Configuration

Configuration.Direction

Field Summary

Fields inherited from interface common.Configuration

AUDIO_DIR, DEFAULT_FRAME_RATE, DRAWABLE_DIR, GAMELOGGER, setViewCallChain

Constructor Summary

Constructors

Constructor	Description
MultiKeyListener()

Method Summary

Modifier and Type	Method	Description
void	disable()	Sets the listener to disabled status.
void	enable()	Sets the listener to enabled mode so it can save and retrieve key status.
int[]	getActiveKeys()	Returns the list of depressed key events or keyCode 0 if no key is pressed
boolean	isEnabled()	Returns the state of this listener.
void	keyPressed(KeyEvent e)
void	keyReleased(KeyEvent e)
void	reset()	Clears out contents of active key tracking set.

Methods inherited from class java.awt.event.KeyAdapter

keyTyped

Methods inherited from class java.lang.Object

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

Constructor Details

MultiKeyListener

public MultiKeyListener()

Method Details

keyPressed

public void keyPressed(KeyEvent e)

Specified by:

keyPressed in interface KeyListener

Overrides:

keyPressed in class KeyAdapter

keyReleased

public void keyReleased(KeyEvent e)

Specified by:

keyReleased in interface KeyListener

Overrides:

keyReleased in class KeyAdapter

getActiveKeys

public int[] getActiveKeys()

Returns the list of depressed key events or keyCode 0 if no key is pressed

Returns:

list The keys currently down

See Also:

• enable()
• disable()

isEnabled

public boolean isEnabled()

Returns the state of this listener. If disabled, the listener returns a zero for the active keys.

Returns:

state The active state of the listener

See Also:

• getActiveKeys()

enable

public void enable()

Sets the listener to enabled mode so it can save and retrieve key status.

disable

public void disable()

Sets the listener to disabled status. Key status will be set to all zeros.

reset

public void reset()

Clears out contents of active key tracking set.