awtevent.java

来自「gcc3.2.1源代码」· Java 代码 · 共 215 行

/* Copyright (C) 1999, 2000, 2002  Free Software Foundation

This file is part of GNU Classpath.

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it under the terms of the GNU General Public License as published by
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General Public License for more details.

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02111-1307 USA.

Linking this library statically or dynamically with other modules is
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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package java.awt;

/* Written using on-line Java 2 Platform Standard Edition v1.3 API 
 * Specification, as well as "The Java Class Libraries", 2nd edition 
 * (Addison-Wesley, 1998).
 * Status:  Believed complete and correct, except for the java.awt.Event 
 * compatibility constructor.
 */

/**
 * AWTEvent is the root event class for all AWT events in the JDK 1.1 event 
 * model. It supersedes the Event class from JDK 1.0.
 * @author Warren Levy  <[e-mail]>
 * @author Aaron M. Renn ([e-mail])
 */
public abstract class AWTEvent extends java.util.EventObject
{
  /**
   * @serial Indicates whether or not this event has been consumed.
   */
  protected boolean consumed;

  /**
   * @serial The identifier number of this event.
   */
  protected int id;

  /**
  * Mask for selecting component events.
  */
  public static final long COMPONENT_EVENT_MASK = 0x001;

  /**
  * Mask for selecting container events.
  */
  public static final long CONTAINER_EVENT_MASK = 0x002;

  /**
  * Mask for selecting component focus events.
  */
  public static final long FOCUS_EVENT_MASK = 0x004;

  /**
  * Mask for selecting keyboard events.
  */
  public static final long KEY_EVENT_MASK = 0x008;

  /**
  * Mask for mouse button events.
  */
  public static final long MOUSE_EVENT_MASK = 0x010;

  /**
  * Mask for mouse motion events.
  */
  public static final long MOUSE_MOTION_EVENT_MASK = 0x020;

  /**
  * Mask for window events.
  */
  public static final long WINDOW_EVENT_MASK = 0x040;

  /**
  * Mask for action events.
  */
  public static final long ACTION_EVENT_MASK = 0x080;

  /**
  * Mask for adjustment events.
  */
  public static final long ADJUSTMENT_EVENT_MASK = 0x100;

  /**
  * Mask for item events.
  */
  public static final long ITEM_EVENT_MASK = 0x200;

  /**
  * Mask for text events.
  */
  public static final long TEXT_EVENT_MASK = 0x400;

  /**
  * This is the highest number for event ids that are reserved for use by
  * the AWT system itself.
  */
  public static final int RESERVED_ID_MAX = 1999;

  public static final long INPUT_METHOD_EVENT_MASK = 1 << 11;

  /* Additional event selection masks from JDK 1.3 javadocs */
  public static final long PAINT_EVENT_MASK            = 1 << 13,
			   INVOCATION_EVENT_MASK       = 1 << 14,
			   HIERARCHY_EVENT_MASK        = 1 << 15,
			   HIERARCHY_BOUNDS_EVENT_MASK = 1 << 16;

  /**
   * Initializes a new instance of <code>AWTEvent</code> from the
   * specified Java 1.0 event object.
   *
   * @param event The Java 1.0 event to initialize from.
   *
   *
   * Removed this method because we no longer support Java 1.0
   *
   */
  public AWTEvent(Event event)
  {
    // FIXME??
    super(event.target);
    this.id = event.id;
  }

  /**
   * Initializes a new instance of <code>AWTEvent</code> with the specified
   * source and id.
   *
   * @param source The object that caused the event.
   * @param id The event id.
   */
  public AWTEvent(Object source, int id)
  {
    super(source);
    this.id = id;
  }

  /**
   * Returns the id number of this event.
   *
   * @return The id number of this event.
   */
  public int getID()
  {
    return id;
  }

  /**
   * Returns a string representation of this event.
   *
   * @return A string representation of this event.
   */
  public String paramString ()
  {
    return "";
  }

  /**
   * Returns a string representation of this event.
   *
   * @return A string representation of this event.
   */
  public String toString ()
  {
    return getClass().getName() + "[" + paramString() + "] on " + source;
  }

  /**
   * Consumes this event so that it will not be processed in the default
   * manner.
   */
  protected void consume()
  {
    consumed = true;
  }

  /**
   * Tests whether not not this event has been consumed.  A consumed event
   * is not processed in the default manner.
   *
   * @return <code>true</code> if this event has been consumed, 
   * <code>false</code> otherwise.
   */
  protected boolean isConsumed()
  {
    return consumed;
  }
}