mousetracklistener.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 methods
 * that deal with the events that are generated as the mouse
 * pointer passes (or hovers) over controls.
 * <p>
 * After creating an instance of a class that implements
 * this interface it can be added to a control using the
 * <code>addMouseTrackListener</code> method and removed using
 * the <code>removeMouseTrackListener</code> method. When the
 * mouse pointer passes into or out of the area of the screen
 * covered by a control or pauses while over a control, the
 * appropriate method will be invoked.
 * </p>
 *
 * @see MouseTrackAdapter
 * @see MouseEvent
 */
public interface MouseTrackListener extends SWTEventListener {

/**
 * Sent when the mouse pointer passes into the area of
 * the screen covered by a control.
 *
 * @param e an event containing information about the mouse enter
 */
public void mouseEnter(MouseEvent e);

/**
 * Sent when the mouse pointer passes out of the area of
 * the screen covered by a control.
 *
 * @param e an event containing information about the mouse exit
 */
public void mouseExit(MouseEvent e);

/**
 * Sent when the mouse pointer hovers (that is, stops moving
 * for an (operating system specified) period of time) over
 * a control.
 *
 * @param e an event containing information about the hover
 */
public void mouseHover(MouseEvent e);
}