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java.awt
Class DefaultKeyboardFocusManager.EventDelayRequest  

java.lang.Object
  java.awt.DefaultKeyboardFocusManager.EventDelayRequest

All Implemented Interfaces:

java.lang.Comparable

Enclosing class:

DefaultKeyboardFocusManager

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private class DefaultKeyboardFocusManager.EventDelayRequest

extends java.lang.Object

implements java.lang.Comparable

This class models a request to delay the dispatch of events that arrive after a certain time, until a certain component becomes the focus owner.

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Field Summary
private  java.util.LinkedList	enqueuedKeyEvents           A java.util.List of java.awt.event.KeyEvents that are being delayed, pending this request's Component receiving the keyboard focus.
Component	focusedComp           When this Component becomes focused, all events between this EventDelayRequest and the next one in will be dispatched from enqueuedKeyEvents 55 .
long	timestamp           An event timestamp.

 

Constructor Summary

DefaultKeyboardFocusManager.EventDelayRequest(long timestamp, Component focusedComp)           Construct a new EventDelayRequest.

 

Method Summary
int	compareTo(java.lang.Object o)           Compares this object with another, and returns a numerical result based on the comparison.
void	discardEvents()
void	dispatchEvents()
void	enqueueEvent(java.awt.event.KeyEvent e)
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

enqueuedKeyEvents

private java.util.LinkedList enqueuedKeyEvents

A java.util.List of java.awt.event.KeyEvents that are being delayed, pending this request's Component receiving the keyboard focus.

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timestamp

public long timestamp

An event timestamp. All events that arrive after this time should be queued in the enqueuedKeyEvents 55 java.util.List.

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focusedComp

public Component focusedComp

When this Component becomes focused, all events between this EventDelayRequest and the next one in will be dispatched from enqueuedKeyEvents 55 .

Constructor Detail

DefaultKeyboardFocusManager.EventDelayRequest

public DefaultKeyboardFocusManager.EventDelayRequest(long timestamp,
                                                     Component focusedComp)

Construct a new EventDelayRequest.

Method Detail

compareTo

public int compareTo(java.lang.Object o)

Description copied from interface: java.lang.Comparable

Compares this object with another, and returns a numerical result based on the comparison. If the result is negative, this object sorts less than the other; if 0, the two are equal, and if positive, this object sorts greater than the other. To translate this into boolean, simply perform o1.compareTo(o2) <op> 0, where op is one of <, <=, =, !=, >, or >=.

You must make sure that the comparison is mutual, ie. sgn(x.compareTo(y)) == -sgn(y.compareTo(x)) (where sgn() is defined as -1, 0, or 1 based on the sign). This includes throwing an exception in either direction if the two are not comparable; hence, compareTo(null) should always throw an Exception.

You should also ensure transitivity, in two forms: x.compareTo(y) > 0 && y.compareTo(z) > 0 implies x.compareTo(z) > 0; and x.compareTo(y) == 0 implies x.compareTo(z) == y.compareTo(z).

Specified by:

compareTo in interface java.lang.Comparable

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equals

public boolean equals(java.lang.Object o)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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enqueueEvent

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

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dispatchEvents

public void dispatchEvents()

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discardEvents

public void discardEvents()

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