2 /* AWTEvent.java -- the root event in AWT
3 Copyright (C) 1999, 2000, 2002, 2005 Free Software Foundation
5 This file is part of GNU Classpath.
7 GNU Classpath is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Classpath is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Classpath; see the file COPYING. If not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 Linking this library statically or dynamically with other modules is
23 making a combined work based on this library. Thus, the terms and
24 conditions of the GNU General Public License cover the whole
27 As a special exception, the copyright holders of this library give you
28 permission to link this library with independent modules to produce an
29 executable, regardless of the license terms of these independent
30 modules, and to copy and distribute the resulting executable under
31 terms of your choice, provided that you also meet, for each linked
32 independent module, the terms and conditions of the license of that
33 module. An independent module is a module which is not derived from
34 or based on this library. If you modify this library, you may extend
35 this exception to your version of the library, but you are not
36 obligated to do so. If you do not wish to do so, delete this
37 exception statement from your version. */
42 import java.awt.event.ActionEvent;
43 import java.awt.event.AdjustmentEvent;
44 import java.awt.event.ComponentEvent;
45 import java.awt.event.ContainerEvent;
46 import java.awt.event.FocusEvent;
47 import java.awt.event.InputMethodEvent;
48 import java.awt.event.InvocationEvent;
49 import java.awt.event.ItemEvent;
50 import java.awt.event.KeyEvent;
51 import java.awt.event.MouseEvent;
52 import java.awt.event.PaintEvent;
53 import java.awt.event.TextEvent;
54 import java.awt.event.WindowEvent;
55 import java.util.EventObject;
58 * AWTEvent is the root event class for all AWT events in the JDK 1.1 event
59 * model. It supersedes the Event class from JDK 1.0. Subclasses outside of
60 * the java.awt package should have IDs greater than RESERVED_ID_MAX.
62 * <p>Event masks defined here are used by components in
63 * <code>enableEvents</code> to select event types not selected by registered
64 * listeners. Event masks are appropriately set when registering on
67 * @author Warren Levy (warrenl@cygnus.com)
68 * @author Aaron M. Renn (arenn@urbanophile.com)
70 * @status updated to 1.4
72 public abstract class AWTEvent extends EventObject
75 * Compatible with JDK 1.1+.
77 private static final long serialVersionUID = -1825314779160409405L;
80 * The ID of the event.
83 * @see #AWTEvent(Object, int)
84 * @serial the identifier number of this event
89 * Indicates if the event has been consumed. False mean it is passed to
90 * the peer, true means it has already been processed. Semantic events
91 * generated by low-level events always have the value true.
95 * @serial whether the event has been consumed
97 protected boolean consumed;
100 * Used for implementing a simple linked list in EventQueue.
102 transient AWTEvent queueNext;
105 * Who knows? It's in the serial version.
107 * @serial No idea what this is for.
112 * Indicates if this event is dispatched by the KeyboardFocusManager.
114 boolean isFocusManagerEvent = false;
116 /** Mask for selecting component events. */
117 public static final long COMPONENT_EVENT_MASK = 0x00001;
119 /** Mask for selecting container events. */
120 public static final long CONTAINER_EVENT_MASK = 0x00002;
122 /** Mask for selecting component focus events. */
123 public static final long FOCUS_EVENT_MASK = 0x00004;
125 /** Mask for selecting keyboard events. */
126 public static final long KEY_EVENT_MASK = 0x00008;
128 /** Mask for mouse button events. */
129 public static final long MOUSE_EVENT_MASK = 0x00010;
131 /** Mask for mouse motion events. */
132 public static final long MOUSE_MOTION_EVENT_MASK = 0x00020;
134 /** Mask for window events. */
135 public static final long WINDOW_EVENT_MASK = 0x00040;
137 /** Mask for action events. */
138 public static final long ACTION_EVENT_MASK = 0x00080;
140 /** Mask for adjustment events. */
141 public static final long ADJUSTMENT_EVENT_MASK = 0x00100;
143 /** Mask for item events. */
144 public static final long ITEM_EVENT_MASK = 0x00200;
146 /** Mask for text events. */
147 public static final long TEXT_EVENT_MASK = 0x00400;
150 * Mask for input method events.
153 public static final long INPUT_METHOD_EVENT_MASK = 0x00800;
156 * Mask if input methods are enabled. Package visible only.
158 static final long INPUT_ENABLED_EVENT_MASK = 0x01000;
161 * Mask for paint events.
164 public static final long PAINT_EVENT_MASK = 0x02000;
167 * Mask for invocation events.
170 public static final long INVOCATION_EVENT_MASK = 0x04000;
173 * Mask for hierarchy events.
176 public static final long HIERARCHY_EVENT_MASK = 0x08000;
179 * Mask for hierarchy bounds events.
182 public static final long HIERARCHY_BOUNDS_EVENT_MASK = 0x10000;
185 * Mask for mouse wheel events.
188 public static final long MOUSE_WHEEL_EVENT_MASK = 0x20000;
191 * Mask for window state events.
194 public static final long WINDOW_STATE_EVENT_MASK = 0x40000;
197 * Mask for window focus events.
200 public static final long WINDOW_FOCUS_EVENT_MASK = 0x80000;
203 * This is the highest number for event ids that are reserved for use by
204 * the AWT system itself. Subclasses outside of java.awt should use higher
207 public static final int RESERVED_ID_MAX = 1999;
211 * Initializes a new AWTEvent from the old Java 1.0 event object.
213 * @param event the old-style event
214 * @throws NullPointerException if event is null
216 public AWTEvent(Event event)
218 this(event.target, event.id);
219 consumed = event.consumed;
223 * Create an event on the specified source object and id.
225 * @param source the object that caused the event
226 * @param id the event id
227 * @throws IllegalArgumentException if source is null
229 public AWTEvent(Object source, int id)
236 * Retarget the event, such as converting a heavyweight component to a
237 * lightweight child of the original. This is not for general use, but
238 * is for event targeting systems like KeyboardFocusManager.
240 * @param source the new source
242 public void setSource(Object source)
244 this.source = source;
248 * Returns the event type id.
250 * @return the id number of this event
258 * Create a string that represents this event in the format
259 * <code>classname[eventstring] on sourcecomponentname</code>.
261 * @return a string representing this event
263 public String toString ()
265 String string = getClass ().getName () + "[" + paramString () + "] on "
272 * Returns a string representation of the state of this event. It may be
273 * empty, but must not be null; it is implementation defined.
275 * @return a string representation of this event
277 public String paramString()
283 * Consumes this event so that it will not be processed in the default
286 protected void consume()
292 * Tests whether not not this event has been consumed. A consumed event
293 * is not processed in the default manner.
295 * @return true if this event has been consumed
297 protected boolean isConsumed()
303 * Converts an event id to the appropriate event mask.
305 * @param id the event id
307 * @return the event mask for the specified id
309 static long eventIdToMask(int id)
314 case ActionEvent.ACTION_PERFORMED:
315 mask = ACTION_EVENT_MASK;
317 case AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED:
318 mask = ADJUSTMENT_EVENT_MASK;
320 case ComponentEvent.COMPONENT_MOVED:
321 case ComponentEvent.COMPONENT_RESIZED:
322 case ComponentEvent.COMPONENT_SHOWN:
323 case ComponentEvent.COMPONENT_HIDDEN:
324 mask = COMPONENT_EVENT_MASK;
326 case ContainerEvent.COMPONENT_ADDED:
327 case ContainerEvent.COMPONENT_REMOVED:
328 mask = CONTAINER_EVENT_MASK;
330 case FocusEvent.FOCUS_GAINED:
331 case FocusEvent.FOCUS_LOST:
332 mask = FOCUS_EVENT_MASK;
334 case InputMethodEvent.INPUT_METHOD_TEXT_CHANGED:
335 case InputMethodEvent.CARET_POSITION_CHANGED:
336 mask = INPUT_METHOD_EVENT_MASK;
338 case InvocationEvent.INVOCATION_DEFAULT:
339 mask = INVOCATION_EVENT_MASK;
341 case ItemEvent.ITEM_STATE_CHANGED:
342 mask = ITEM_EVENT_MASK;
344 case KeyEvent.KEY_TYPED:
345 case KeyEvent.KEY_PRESSED:
346 case KeyEvent.KEY_RELEASED:
347 mask = KEY_EVENT_MASK;
349 case MouseEvent.MOUSE_CLICKED:
350 case MouseEvent.MOUSE_PRESSED:
351 case MouseEvent.MOUSE_RELEASED:
352 mask = MOUSE_EVENT_MASK;
354 case MouseEvent.MOUSE_MOVED:
355 case MouseEvent.MOUSE_ENTERED:
356 case MouseEvent.MOUSE_EXITED:
357 case MouseEvent.MOUSE_DRAGGED:
358 mask = MOUSE_MOTION_EVENT_MASK;
360 case MouseEvent.MOUSE_WHEEL:
361 mask = MOUSE_WHEEL_EVENT_MASK;
363 case PaintEvent.PAINT:
364 case PaintEvent.UPDATE:
365 mask = PAINT_EVENT_MASK;
367 case TextEvent.TEXT_VALUE_CHANGED:
368 mask = TEXT_EVENT_MASK;
370 case WindowEvent.WINDOW_OPENED:
371 case WindowEvent.WINDOW_CLOSING:
372 case WindowEvent.WINDOW_CLOSED:
373 case WindowEvent.WINDOW_ICONIFIED:
374 case WindowEvent.WINDOW_DEICONIFIED:
375 case WindowEvent.WINDOW_ACTIVATED:
376 case WindowEvent.WINDOW_DEACTIVATED:
377 mask = WINDOW_EVENT_MASK;
379 case WindowEvent.WINDOW_GAINED_FOCUS:
380 case WindowEvent.WINDOW_LOST_FOCUS:
381 mask = WINDOW_FOCUS_EVENT_MASK;
383 case WindowEvent.WINDOW_STATE_CHANGED:
384 mask = WINDOW_STATE_EVENT_MASK;