orbital.moon.awt
Class SystemRequestor

java.lang.Object
  java.awt.event.KeyAdapter
      orbital.moon.awt.SystemRequestor

All Implemented Interfaces:

java.awt.event.KeyListener, java.util.EventListener

public class SystemRequestor
extends java.awt.event.KeyAdapter

This class is a SystemRequestor that will call a predicate on interrupt or abort requests when registered as a key listener.

Use one of:

 component.addKeyListener(new SystemRequestor(reactorPredicate));
 new SystemRequestor(reactorPredicate, component);
 

Note that if you intend to let the predicate abort the application without further user feedback SystemRequestor needs being the first key listener to notify.

Author:

André Platzer

Field Summary

static int	ABORT
static int	INTERRUPT
protected Predicate	request

Constructor Summary

SystemRequestor(Predicate requestReactor)
Construct a SystemRequestor calling the given predicate on interrupt and abort requests.

SystemRequestor(Predicate requestReactor, java.awt.Component comp)
Construct a SystemRequestor calling the given predicate on interrupt and abort requests.

Method Summary

void	keyPressed(java.awt.event.KeyEvent e) Check for Abort and Interrupt requests.

Methods inherited from class java.awt.event.KeyAdapter

keyReleased, keyTyped

Methods inherited from class java.lang.Object

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

Field Detail

INTERRUPT

public static final int INTERRUPT

See Also:

Constant Field Values

ABORT

public static final int ABORT

See Also:

Constant Field Values

request

protected Predicate request

Constructor Detail

SystemRequestor

public SystemRequestor(Predicate requestReactor)

Construct a SystemRequestor calling the given predicate on interrupt and abort requests.

Parameters:

requestReactor - the predicate called when an interrupt or abort request occured. This predicate can perform the corresponding operations to interrupt running thread or abort the program.

SystemRequestor

public SystemRequestor(Predicate requestReactor,
                       java.awt.Component comp)

Construct a SystemRequestor calling the given predicate on interrupt and abort requests. Automatically registers as a key listener of the component specified.

Parameters:

requestReactor - the predicate called when an interrupt or abort request occured. This predicate can perform the corresponding operations to interrupt running thread or abort the program.

comp - the component to register to.

Method Detail

keyPressed

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

Check for Abort and Interrupt requests.

Specified by:

keyPressed in interface java.awt.event.KeyListener

Overrides:

keyPressed in class java.awt.event.KeyAdapter