verifylistener.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

/*******************************************************************************
 * 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.internal.SWTEventListener;

/**
 * Classes which implement this interface provide a method
 * that deals with the events that are generated when text
 * is about to be modified.
 * <p>
 * After creating an instance of a class that implements
 * this interface it can be added to a text widget using the
 * <code>addVerifyListener</code> method and removed using
 * the <code>removeVerifyListener</code> method. When the
 * text is about to be modified, the verifyText method
 * will be invoked.
 * </p>
 *
 * @see VerifyEvent
 */
public interface VerifyListener extends SWTEventListener {

/**
 * Sent when the text is about to be modified.
 * <p>
 * A verify event occurs after the user has done something
 * to modify the text (typically typed a key), but before
 * the text is modified. The doit field in the verify event
 * indicates whether or not to modify the text.
 * </p>
 *
 * @param e an event containing information about the verify
 */
public void verifyText(VerifyEvent e);
}