JDK14/Java14源码在线阅读

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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file and, per its terms, should not be removed:
 *
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.
 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.dom.events;

import org.w3c.dom.views.AbstractView;

/**
 * The <code>MouseEvent</code> interface provides specific contextual
 * information associated with Mouse events.
 * <p>The <code>detail</code> attribute inherited from <code>UIEvent</code>
 * indicates the number of times a mouse button has been pressed and
 * released over the same screen location during a user action. The
 * attribute value is 1 when the user begins this action and increments by 1
 * for each full sequence of pressing and releasing. If the user moves the
 * mouse between the mousedown and mouseup the value will be set to 0,
 * indicating that no click is occurring.
 * <p>In the case of nested elements mouse events are always targeted at the
 * most deeply nested element. Ancestors of the targeted element may use
 * bubbling to obtain notification of mouse events which occur within its
 * descendent elements.
 * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113'>Document Object Model (DOM) Level 2 Events Specification</a>.
 * @since 1.5, DOM Level 2
 */
public interface MouseEvent extends UIEvent {
    /**
     * The horizontal coordinate at which the event occurred relative to the
     * origin of the screen coordinate system.
     */
    public int getScreenX();

    /**
     * The vertical coordinate at which the event occurred relative to the
     * origin of the screen coordinate system.
     */
    public int getScreenY();

    /**
     * The horizontal coordinate at which the event occurred relative to the
     * DOM implementation's client area.
     */
    public int getClientX();

    /**
     * The vertical coordinate at which the event occurred relative to the DOM
     * implementation's client area.
     */
    public int getClientY();

    /**
     * Used to indicate whether the 'ctrl' key was depressed during the firing
     * of the event.
     */
    public boolean getCtrlKey();

    /**
     * Used to indicate whether the 'shift' key was depressed during the
     * firing of the event.
     */
    public boolean getShiftKey();

    /**
     * Used to indicate whether the 'alt' key was depressed during the firing
     * of the event. On some platforms this key may map to an alternative
     * key name.
     */
    public boolean getAltKey();

    /**
     * Used to indicate whether the 'meta' key was depressed during the firing
     * of the event. On some platforms this key may map to an alternative
     * key name.
     */
    public boolean getMetaKey();

    /**
     * During mouse events caused by the depression or release of a mouse
     * button, <code>button</code> is used to indicate which mouse button
     * changed state. The values for <code>button</code> range from zero to
     * indicate the left button of the mouse, one to indicate the middle
     * button if present, and two to indicate the right button. For mice
     * configured for left handed use in which the button actions are
     * reversed the values are instead read from right to left.
     */
    public short getButton();

    /**
     * Used to identify a secondary <code>EventTarget</code> related to a UI
     * event. Currently this attribute is used with the mouseover event to
     * indicate the <code>EventTarget</code> which the pointing device
     * exited and with the mouseout event to indicate the
     * <code>EventTarget</code> which the pointing device entered.
     */
    public EventTarget getRelatedTarget();

    /**
     * The <code>initMouseEvent</code> method is used to initialize the value
     * of a <code>MouseEvent</code> created through the
     * <code>DocumentEvent</code> interface. This method may only be called
     * before the <code>MouseEvent</code> has been dispatched via the
     * <code>dispatchEvent</code> method, though it may be called multiple
     * times during that phase if necessary. If called multiple times, the
     * final invocation takes precedence.
     * @param typeArg Specifies the event type.
     * @param canBubbleArg Specifies whether or not the event can bubble.
     * @param cancelableArg Specifies whether or not the event's default
     *   action can be prevented.
     * @param viewArg Specifies the <code>Event</code>'s
     *   <code>AbstractView</code>.
     * @param detailArg Specifies the <code>Event</code>'s mouse click count.
     * @param screenXArg Specifies the <code>Event</code>'s screen x
     *   coordinate
     * @param screenYArg Specifies the <code>Event</code>'s screen y
     *   coordinate
     * @param clientXArg Specifies the <code>Event</code>'s client x
     *   coordinate
     * @param clientYArg Specifies the <code>Event</code>'s client y
     *   coordinate
     * @param ctrlKeyArg Specifies whether or not control key was depressed
     *   during the <code>Event</code>.
     * @param altKeyArg Specifies whether or not alt key was depressed during
     *   the <code>Event</code>.
     * @param shiftKeyArg Specifies whether or not shift key was depressed
     *   during the <code>Event</code>.
     * @param metaKeyArg Specifies whether or not meta key was depressed
     *   during the <code>Event</code>.
     * @param buttonArg Specifies the <code>Event</code>'s mouse button.

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