Source Code Cross Referenced for ViewPlatformAWTBehavior.java in  » 6.0-JDK-Modules » java-3d » com » sun » j3d » utils » behaviors » vp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » java 3d » com.sun.j3d.utils.behaviors.vp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: ViewPlatformAWTBehavior.java,v $
003:         *
004:         * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
005:         *
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions
008:         * are met:
009:         *
010:         * - Redistribution of source code must retain the above copyright
011:         *   notice, this list of conditions and the following disclaimer.
012:         *
013:         * - Redistribution in binary form must reproduce the above copyright
014:         *   notice, this list of conditions and the following disclaimer in
015:         *   the documentation and/or other materials provided with the
016:         *   distribution.
017:         *
018:         * Neither the name of Sun Microsystems, Inc. or the names of
019:         * contributors may be used to endorse or promote products derived
020:         * from this software without specific prior written permission.
021:         *
022:         * This software is provided "AS IS," without a warranty of any
023:         * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
024:         * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
025:         * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
026:         * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
027:         * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
028:         * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
029:         * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
030:         * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
031:         * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
032:         * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
033:         * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
034:         * POSSIBILITY OF SUCH DAMAGES.
035:         *
036:         * You acknowledge that this software is not designed, licensed or
037:         * intended for use in the design, construction, operation or
038:         * maintenance of any nuclear facility.
039:         *
040:         * $Revision: 1.5 $
041:         * $Date: 2007/02/09 17:20:15 $
042:         * $State: Exp $
043:         */
044:
045:        package com.sun.j3d.utils.behaviors.vp;
046:
047:        import java.awt.event.ComponentEvent;
048:        import java.awt.event.MouseEvent;
049:        import java.awt.event.MouseListener;
050:        import java.awt.event.MouseWheelListener;
051:        import java.awt.event.MouseMotionListener;
052:        import java.awt.event.KeyListener;
053:        import java.awt.event.KeyEvent;
054:        import java.awt.AWTEvent;
055:        import java.awt.Component;
056:        import java.awt.Cursor;
057:        import javax.swing.SwingUtilities;
058:        import java.util.ArrayList;
059:
060:        import javax.media.j3d.WakeupOnBehaviorPost;
061:        import javax.media.j3d.WakeupOnElapsedFrames;
062:        import javax.media.j3d.WakeupOr;
063:        import javax.media.j3d.WakeupCriterion;
064:        import javax.media.j3d.WakeupCondition;
065:        import javax.media.j3d.TransformGroup;
066:        import javax.media.j3d.Transform3D;
067:        import javax.media.j3d.View;
068:        import javax.media.j3d.Canvas3D;
069:
070:        import javax.vecmath.Vector3f;
071:        import com.sun.j3d.utils.universe.*;
072:
073:        /**
074:         * Abstract class which implements much of the event tracking and
075:         * state updating in a thread safe manner.
076:         *
077:         * AWT Events are captured and placed in a queue.
078:         *
079:         * While there are pending events or motion the behavior will wake
080:         * up every frame, call processAWTEvents and integrateTransforms. 
081:         *
082:         * @since Java 3D 1.2.1
083:         */
084:        public abstract class ViewPlatformAWTBehavior extends
085:                ViewPlatformBehavior implements  MouseListener,
086:                MouseMotionListener, KeyListener, MouseWheelListener {
087:
088:            private final static boolean DEBUG = false;
089:
090:            /**
091:             * Behavior PostId used in this behavior
092:             */
093:            protected final static int POST_ID = 9998;
094:
095:            /**
096:             * The different criterion for the behavior to wakeup
097:             */
098:            protected WakeupOnElapsedFrames frameWakeup;
099:
100:            /**
101:             * The Or of the different criterion for the behavior to wakeup
102:             */
103:            protected WakeupOnBehaviorPost postWakeup;
104:
105:            /**
106:             * The target Transform3D for this behavior
107:             */
108:            protected Transform3D targetTransform = new Transform3D();
109:
110:            /**
111:             * Boolean for whether the mouse is in motion
112:             */
113:            protected boolean motion = false;
114:
115:            /**
116:             * Flag indicating Behavior should listen for Mouse Events
117:             */
118:            public final static int MOUSE_LISTENER = 0x01;
119:
120:            /**
121:             * Flag indicating Behavior should listen for Mouse Motion Events
122:             */
123:            public final static int MOUSE_MOTION_LISTENER = 0x02;
124:
125:            /**
126:             * Flag indicating Behavior should listen for Key Events
127:             */
128:            public final static int KEY_LISTENER = 0x04;
129:
130:            /**
131:             * Flag indicating Behavior should listen for MouseWheel Events
132:             */
133:            public final static int MOUSE_WHEEL_LISTENER = 0x08;
134:
135:            /**
136:             * The Canvas3Ds from which this Behavior gets AWT events
137:             */
138:            protected Canvas3D canvases[];
139:
140:            private ArrayList eventQueue = new ArrayList();
141:            private int listenerFlags = 0;
142:            private boolean firstEvent = false;
143:
144:            /**
145:             * Parameterless constructor for this behavior, intended for use by
146:             * subclasses instantiated through ConfiguredUniverse. Such a constructor
147:             * is required for configurable behaviors.  
148:             * @since Java 3D 1.3
149:             */
150:            protected ViewPlatformAWTBehavior() {
151:                super ();
152:            }
153:
154:            /**
155:             * Construct a behavior which listens for events specified by the given
156:             * flags, intended for use by subclasses instantiated through
157:             * ConfiguredUniverse. 
158:             * 
159:             * @param listenerFlags Indicates which listener should be registered,
160:             * one or more of MOUSE_LISTENER, MOUSE_MOTION_LISTENER, KEY_LISTENER, MOUSE_WHEEL_LISTENER
161:             * @since Java 3D 1.3
162:             */
163:            protected ViewPlatformAWTBehavior(int listenerFlags) {
164:                super ();
165:                setListenerFlags(listenerFlags);
166:            }
167:
168:            /**
169:             * Constructs a new ViewPlatformAWTBehavior.
170:             * 
171:             * @param c The Canvas3D on which to listen for events. If this is null a
172:             * NullPointerException will be thrown.
173:             * @param listenerFlags Indicates which listener should be registered,
174:             * one or more of MOUSE_LISTENER, MOUSE_MOTION_LISTENER, KEY_LISTENER, MOUSE_WHEEL_LISTENER
175:             */
176:            public ViewPlatformAWTBehavior(Canvas3D c, int listenerFlags) {
177:                super ();
178:
179:                if (c == null)
180:                    throw new NullPointerException();
181:
182:                canvases = new Canvas3D[] { c };
183:                setListenerFlags(listenerFlags);
184:            }
185:
186:            /**
187:             * Sets listener flags for this behavior.
188:             *
189:             * @param listenerFlags Indicates which listener should be registered,
190:             * one or more of MOUSE_LISTENER, MOUSE_MOTION_LISTENER, KEY_LISTENER, MOUSE_WHEEL_LISTENER
191:             * @since Java 3D 1.3
192:             */
193:            protected void setListenerFlags(int listenerFlags) {
194:                this .listenerFlags = listenerFlags;
195:            }
196:
197:            /**
198:             * Initializes the behavior.
199:             * NOTE: Applications should not call this method. It is called by the
200:             * Java 3D behavior scheduler.
201:             */
202:            public void initialize() {
203:                frameWakeup = new WakeupOnElapsedFrames(0);
204:                postWakeup = new WakeupOnBehaviorPost(this , POST_ID);
205:
206:                wakeupOn(postWakeup);
207:            }
208:
209:            /**
210:             * Process a stimulus meant for this behavior. 
211:             * NOTE: Applications should not call this method. It is called by the
212:             * Java 3D behavior scheduler.
213:             */
214:            public void processStimulus(java.util.Enumeration behEnum) {
215:                boolean hadPost = false;
216:
217:                while (behEnum.hasMoreElements()) {
218:                    WakeupCondition wakeup = (WakeupCondition) behEnum
219:                            .nextElement();
220:                    if (wakeup instanceof  WakeupOnBehaviorPost) {
221:                        hadPost = true;
222:                    } else if (wakeup instanceof  WakeupOnElapsedFrames) {
223:                        AWTEvent[] events = null;
224:                        // access to event queue must be synchronized
225:                        synchronized (eventQueue) {
226:                            events = (AWTEvent[]) eventQueue
227:                                    .toArray(new AWTEvent[eventQueue.size()]);
228:                            eventQueue.clear();
229:                        }
230:                        processAWTEvents(events);
231:
232:                        if (motion)
233:                            integrateTransforms();
234:                    }
235:                }
236:
237:                if (motion || hadPost) {
238:                    // wake up on behavior posts and elapsed frames if in motion
239:                    wakeupOn(frameWakeup);
240:                } else {
241:                    // only wake up on behavior posts if not in motion
242:                    wakeupOn(postWakeup);
243:                }
244:            }
245:
246:            /**
247:             * Overload setEnable from Behavior.
248:             *
249:             * Adds/Removes the AWT listeners depending on the requested
250:             * state.
251:             */
252:            public void setEnable(boolean state) {
253:                if (state == getEnable())
254:                    return;
255:
256:                super .setEnable(state);
257:
258:                if (canvases != null) {
259:                    enableListeners(state);
260:                }
261:            }
262:
263:            private void enableListeners(boolean enable) {
264:                if (enable) {
265:                    firstEvent = true;
266:                    if ((listenerFlags & MOUSE_LISTENER) != 0)
267:                        for (int i = 0; i < canvases.length; i++)
268:                            canvases[i].addMouseListener(this );
269:
270:                    if ((listenerFlags & MOUSE_MOTION_LISTENER) != 0)
271:                        for (int i = 0; i < canvases.length; i++)
272:                            canvases[i].addMouseMotionListener(this );
273:
274:                    if ((listenerFlags & MOUSE_WHEEL_LISTENER) != 0)
275:                        for (int i = 0; i < canvases.length; i++)
276:                            canvases[i].addMouseWheelListener(this );
277:
278:                    if ((listenerFlags & KEY_LISTENER) != 0)
279:                        for (int i = 0; i < canvases.length; i++)
280:                            canvases[i].addKeyListener(this );
281:                } else {
282:                    if ((listenerFlags & MOUSE_LISTENER) != 0)
283:                        for (int i = 0; i < canvases.length; i++)
284:                            canvases[i].removeMouseListener(this );
285:
286:                    if ((listenerFlags & MOUSE_MOTION_LISTENER) != 0)
287:                        for (int i = 0; i < canvases.length; i++)
288:                            canvases[i].removeMouseMotionListener(this );
289:
290:                    if ((listenerFlags & MOUSE_WHEEL_LISTENER) != 0)
291:                        for (int i = 0; i < canvases.length; i++)
292:                            canvases[i].removeMouseWheelListener(this );
293:
294:                    if ((listenerFlags & KEY_LISTENER) != 0)
295:                        for (int i = 0; i < canvases.length; i++)
296:                            canvases[i].removeKeyListener(this );
297:                }
298:            }
299:
300:            /**
301:             * Sets the ViewingPlatform for this behavior.  This method is
302:             * called by the ViewingPlatform.
303:             * If a sub-calls overrides this method, it must call
304:             * super.setViewingPlatform(vp).
305:             * NOTE: Applications should <i>not</i> call this method.    
306:             */
307:            public void setViewingPlatform(ViewingPlatform vp) {
308:                super .setViewingPlatform(vp);
309:
310:                if (vp == null) {
311:                    enableListeners(false);
312:                } else {
313:                    if (canvases != null) {
314:                        // May be switching canvases here.
315:                        enableListeners(false);
316:                    }
317:
318:                    // Use the canvases associated with viewer[0]; if no viewer is
319:                    // available yet, see if a canvas was provided with a constructor.
320:                    Viewer[] viewers = vp.getViewers();
321:
322:                    if (viewers != null && viewers[0] != null)
323:                        canvases = viewers[0].getCanvas3Ds();
324:
325:                    if (canvases == null || canvases[0] == null)
326:                        throw new IllegalStateException("No canvases available");
327:
328:                    if (getEnable()) {
329:                        enableListeners(true);
330:                    }
331:                }
332:            }
333:
334:            /**
335:             * This is called once per frame if there are any AWT events to
336:             * process.
337:             *
338:             * The <code>motion</code> variable will be true when the method
339:             * is called. If it is true when the method returns integrateTransforms
340:             * will be called immediately.
341:             *
342:             * The AWTEvents are presented in the array in the order in which they
343:             * arrived from AWT.
344:             */
345:            protected abstract void processAWTEvents(
346:                    final java.awt.AWTEvent[] events);
347:
348:            /**
349:             * Called once per frame (if the view is moving) to calculate the new
350:             * view platform transform
351:             */
352:            protected abstract void integrateTransforms();
353:
354:            /**
355:             * Queue AWTEvents in a thread safe manner.
356:             *
357:             * If subclasses override this method they must call
358:             * super.queueAWTEvent(e)
359:             */
360:            protected void queueAWTEvent(AWTEvent e) {
361:                // add new event to the queue
362:                // must be MT safe
363:                synchronized (eventQueue) {
364:                    eventQueue.add(e);
365:                    // Only need to post if this is the only event in the queue.
366:                    // There have been reports that the first event after
367:                    // setViewingPlatform() is sometimes missed, so check the
368:                    // firstEvent flag as well.
369:                    if (firstEvent || eventQueue.size() == 1) {
370:                        firstEvent = false;
371:                        postId(POST_ID);
372:                    }
373:                }
374:            }
375:
376:            public void mouseClicked(final MouseEvent e) {
377:                queueAWTEvent(e);
378:            }
379:
380:            public void mouseEntered(final MouseEvent e) {
381:                queueAWTEvent(e);
382:            }
383:
384:            public void mouseExited(final MouseEvent e) {
385:                queueAWTEvent(e);
386:            }
387:
388:            public void mousePressed(final MouseEvent e) {
389:                queueAWTEvent(e);
390:            }
391:
392:            public void mouseReleased(final MouseEvent e) {
393:                queueAWTEvent(e);
394:            }
395:
396:            public void mouseDragged(final MouseEvent e) {
397:                queueAWTEvent(e);
398:            }
399:
400:            public void mouseMoved(final MouseEvent e) {
401:                queueAWTEvent(e);
402:            }
403:
404:            public void keyReleased(final java.awt.event.KeyEvent e) {
405:                queueAWTEvent(e);
406:            }
407:
408:            public void keyPressed(final java.awt.event.KeyEvent e) {
409:                queueAWTEvent(e);
410:            }
411:
412:            public void keyTyped(final java.awt.event.KeyEvent e) {
413:                queueAWTEvent(e);
414:            }
415:
416:            public void mouseWheelMoved(final java.awt.event.MouseWheelEvent e) {
417:                queueAWTEvent(e);
418:            }
419:        }
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