net.java.games.input

Class ControllerEnvironment

java.lang.Object

net.java.games.input.ControllerEnvironment

public abstract class ControllerEnvironment
extends java.lang.Object

A ControllerEnvironment represents a collection of controllers that are physically or logically linked. By default, this corresponds to the environment for the local machine.

In this reference implementation, this class can also be used to register controllers with the default environment as "plug-ins". A plug-in is created by subclassing ControllerEnvironment with a class that has a public no-argument constructor, implements the net.java.games.util.plugins.Plugin interface and has a name ending in "Plugin". (See net.java.games.input.DirectInputEnvironmentPlugin in the DXplugin part of the source tree for an example.) When the DefaultControllerEnvrionment is instanced it uses the plugin library to look for Plugins in both [java.home]/lib/controller and [user.dir]/controller. This allows controller plugins to be installed either globally for the entire Java environment or locally for just one particular Java app. For more information on the organization of plugins within the controller root directories, see net.java.games.util.plugins.Plugins (Note the plural -- "Plugins" not "Plugin" which is just a marker interface.)

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.ArrayList	controllerListeners List of controller listeners

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ControllerEnvironment() Protected constructor for subclassing.

Method Summary

Modifier and Type	Method and Description
void	addControllerListener(ControllerListener l) Adds a listener for controller state change events.
protected void	fireControllerAdded(Controller c) Creates and sends an event to the controller listeners that a controller has been added.
protected void	fireControllerRemoved(Controller c) Creates and sends an event to the controller listeners that a controller has been lost.
abstract Controller[]	getControllers() Returns a list of all controllers available to this environment, or an empty array if there are no controllers in this environment.
static ControllerEnvironment	getDefaultEnvironment() Returns the default environment for input controllers.
abstract boolean	isSupported() Returns the isSupported status of this environment.
void	removeControllerListener(ControllerListener l) Removes a listener for controller state change events.

Methods inherited from class java.lang.Object

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

Field Detail

controllerListeners

protected final java.util.ArrayList controllerListeners

List of controller listeners

Constructor Detail

ControllerEnvironment

protected ControllerEnvironment()

Protected constructor for subclassing.

Method Detail

getControllers

public abstract Controller[] getControllers()

Returns a list of all controllers available to this environment, or an empty array if there are no controllers in this environment.

addControllerListener

public void addControllerListener(ControllerListener l)

Adds a listener for controller state change events.

isSupported

public abstract boolean isSupported()

Returns the isSupported status of this environment. What makes an environment supported or not is up to the particular plugin, but may include OS or available hardware.

removeControllerListener

public void removeControllerListener(ControllerListener l)

Removes a listener for controller state change events.

fireControllerAdded

protected void fireControllerAdded(Controller c)

Creates and sends an event to the controller listeners that a controller has been added.

fireControllerRemoved

protected void fireControllerRemoved(Controller c)

Creates and sends an event to the controller listeners that a controller has been lost.

getDefaultEnvironment

public static ControllerEnvironment getDefaultEnvironment()

Returns the default environment for input controllers. This usually corresponds to the environment for the local machine.