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Java Source | 1998-03-20 | 3.8 KB | 154 lines |
- /*
- * @(#)InputEvent.java 1.14 98/03/18
- *
- * Copyright 1996, 1997 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- package java.awt.event;
-
- import java.awt.Event;
- import java.awt.Component;
-
- /**
- * The root event class for all component-level input events.
- *
- * Input events are delivered to listeners before they are
- * processed normally by the source where they originated.
- * This allows listeners and component subclasses to "consume"
- * the event so that the source will not process them in their
- * default manner. For example, consuming mousePressed events
- * on a Button component will prevent the Button from being
- * activated.
- *
- * @see KeyEvent
- * @see KeyAdapter
- * @see MouseEvent
- * @see MouseAdapter
- * @see MouseMotionAdapter
- *
- * @version 1.14 03/18/98
- * @author Carl Quinn
- */
- public abstract class InputEvent extends ComponentEvent {
-
- /**
- * The shift key modifier constant.
- */
- public static final int SHIFT_MASK = Event.SHIFT_MASK;
-
- /**
- * The control key modifier constant.
- */
- public static final int CTRL_MASK = Event.CTRL_MASK;
-
- /**
- * The meta key modifier constant.
- */
- public static final int META_MASK = Event.META_MASK;
-
- /**
- * The alt key modifier constant.
- */
- public static final int ALT_MASK = Event.ALT_MASK;
-
- /**
- * The mouse button1 modifier constant.
- */
- public static final int BUTTON1_MASK = 1 << 4;
-
- /**
- * The mouse button2 modifier constant.
- */
- public static final int BUTTON2_MASK = Event.ALT_MASK;
-
- /**
- * The mouse button3 modifier constant.
- */
- public static final int BUTTON3_MASK = Event.META_MASK;
-
- long when;
- int modifiers;
-
- /**
- * Constructs an InputEvent object with the specified source component,
- * modifiers, and type.
- * @param source the object where the event originated
- * @id the event type
- * @when the time the event occurred
- * @modifiers the modifier keys down while event occurred
- */
- InputEvent(Component source, int id, long when, int modifiers) {
- super(source, id);
- this.when = when;
- this.modifiers = modifiers;
- }
-
- /**
- * Returns whether or not the Shift modifier is down on this event.
- */
- public boolean isShiftDown() {
- return (modifiers & Event.SHIFT_MASK) != 0;
- }
-
- /**
- * Returns whether or not the Control modifier is down on this event.
- */
- public boolean isControlDown() {
- return (modifiers & Event.CTRL_MASK) != 0;
- }
-
- /**
- * Returns whether or not the Meta modifier is down on this event.
- */
- public boolean isMetaDown() {
- return (modifiers & Event.META_MASK) != 0;
- }
-
- /**
- * Returns whether or not the Alt modifier is down on this event.
- */
- public boolean isAltDown() {
- return (modifiers & Event.ALT_MASK) != 0;
- }
-
-
- /**
- * Returns the timestamp of when this event occurred.
- */
- public long getWhen() {
- return when;
- }
-
- /**
- * Returns the modifiers flag for this event.
- */
- public int getModifiers() {
- return modifiers;
- }
-
- /**
- * Consumes this event so that it will not be processed
- * in the default manner by the source which originated it.
- */
- public void consume() {
- consumed = true;
- }
-
- /**
- * Returns whether or not this event has been consumed.
- * @see #consume
- */
- public boolean isConsumed() {
- return consumed;
- }
-
- }
-