?? keyevent.java
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/******************************************************************************* * Copyright (c) 2000, 2003 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Common Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/cpl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/package org.eclipse.swt.events;import org.eclipse.swt.widgets.Event;/** * Instances of this class are sent as a result of * keys being pressed and released on the keyboard * * @see KeyListener */public class KeyEvent extends TypedEvent { /** * the character represented by the key that was typed. * This is the final character that results after all modifiers have been * applied. For example, when the user types Ctrl+A, the character value * is 0x01. It is important that applications do not attempt to modify the * character value based on a stateMask (such as SWT.CTRL) or the resulting * character will not be correct. */ public char character; /** * the key code of the key that was typed, * as defined by the key code constants in class <code>SWT</code>. * When the character field of the event is ambiguous, this field * contains the unicode value of the original character. For example, * typing Ctrl+M or Return both result in the character '\r' but the * keyCode field will also contain '\r' when Return was typed. * * @see org.eclipse.swt.SWT */ public int keyCode; /** * the state of the keyboard modifier keys at the time * the event was generated */ public int stateMask; /** * A flag indicating whether the operation should be allowed. * Setting this field to <code>false</code> will cancel the operation. */ public boolean doit;/** * Constructs a new instance of this class based on the * information in the given untyped event. * * @param e the untyped event containing the information */public KeyEvent(Event e) { super(e); this.character = e.character; this.keyCode = e.keyCode; this.stateMask = e.stateMask; this.doit = e.doit;}/** * Returns a string containing a concise, human-readable * description of the receiver. * * @return a string representation of the event */public String toString() { String string = super.toString (); return string.substring (0, string.length() - 1) // remove trailing '}' + " character='" + ((character == 0) ? "\\0" : "" + character) + "'" + " keyCode=" + keyCode + " stateMask=" + stateMask + " doit=" + doit + "}";}}
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