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TextEvent.java
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113 lines (102 loc) · 2.92 KB
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/*
* Copyright (c) 1996, 2008, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.awt.event;
import java.awt.AWTEvent;
/**
* A semantic event which indicates that an object's text changed.
* This high-level event is generated by an object (such as a TextComponent)
* when its text changes. The event is passed to
* every <code>TextListener</code> object which registered to receive such
* events using the component's <code>addTextListener</code> method.
* <P>
* The object that implements the <code>TextListener</code> interface gets
* this <code>TextEvent</code> when the event occurs. The listener is
* spared the details of processing individual mouse movements and key strokes
* Instead, it can process a "meaningful" (semantic) event like "text changed".
* <p>
* An unspecified behavior will be caused if the {@code id} parameter
* of any particular {@code TextEvent} instance is not
* in the range from {@code TEXT_FIRST} to {@code TEXT_LAST}.
*
* @author Georges Saab
*
* @see java.awt.TextComponent
* @see TextListener
*
* @since 1.1
*/
public class TextEvent extends AWTEvent {
/**
* The first number in the range of ids used for text events.
*/
public static final int TEXT_FIRST = 900;
/**
* The last number in the range of ids used for text events.
*/
public static final int TEXT_LAST = 900;
/**
* This event id indicates that object's text changed.
*/
public static final int TEXT_VALUE_CHANGED = TEXT_FIRST;
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = 6269902291250941179L;
/**
* Constructs a <code>TextEvent</code> object.
* <p> This method throws an
* <code>IllegalArgumentException</code> if <code>source</code>
* is <code>null</code>.
*
* @param source The (<code>TextComponent</code>) object that
* originated the event
* @param id An integer that identifies the event type.
* For information on allowable values, see
* the class description for {@link TextEvent}
* @throws IllegalArgumentException if <code>source</code> is null
* @see #getSource()
* @see #getID()
*/
public TextEvent(Object source, int id) {
super(source, id);
}
/**
* Returns a parameter string identifying this text event.
* This method is useful for event-logging and for debugging.
*
* @return a string identifying the event and its attributes
*/
public String paramString() {
String typeStr;
switch(id) {
case TEXT_VALUE_CHANGED:
typeStr = "TEXT_VALUE_CHANGED";
break;
default:
typeStr = "unknown type";
}
return typeStr;
}
}