Source Code Cross Referenced for MouseZoom.java in  » 6.0-JDK-Modules » java-3d » com » sun » j3d » utils » behaviors » mouse » 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.mouse 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: MouseZoom.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: 1.4 $
041:         * $Date: 2007/02/09 17:20:13 $
042:         * $State: Exp $
043:         */
044:
045:        package com.sun.j3d.utils.behaviors.mouse;
046:
047:        import java.awt.*;
048:        import java.awt.event.*;
049:        import java.util.*;
050:        import javax.media.j3d.*;
051:        import javax.vecmath.*;
052:
053:        /**
054:         * MouseZoom is a Java3D behavior object that lets users control the 
055:         * Z axis translation of an object via a mouse drag motion with the second
056:         * mouse button. See MouseRotate for similar usage info.
057:         */
058:
059:        public class MouseZoom extends MouseBehavior {
060:
061:            double z_factor = .04;
062:            Vector3d translation = new Vector3d();
063:
064:            private MouseBehaviorCallback callback = null;
065:
066:            /**
067:             * Creates a zoom behavior given the transform group.
068:             * @param transformGroup The transformGroup to operate on.
069:             */
070:            public MouseZoom(TransformGroup transformGroup) {
071:                super (transformGroup);
072:            }
073:
074:            /**
075:             * Creates a default mouse zoom behavior.
076:             **/
077:            public MouseZoom() {
078:                super (0);
079:            }
080:
081:            /**
082:             * Creates a zoom behavior.
083:             * Note that this behavior still needs a transform
084:             * group to work on (use setTransformGroup(tg)) and
085:             * the transform group must add this behavior.
086:             * @param flags
087:             */
088:            public MouseZoom(int flags) {
089:                super (flags);
090:            }
091:
092:            /**
093:             * Creates a zoom behavior that uses AWT listeners and behavior
094:             * posts rather than WakeupOnAWTEvent.  The behavior is added to the
095:             * specified Component.  A null component can be passed to specify
096:             * the behavior should use listeners.  Components can then be added
097:             * to the behavior with the addListener(Component c) method.
098:             * @param c The Component to add the MouseListener
099:             * and MouseMotionListener to.
100:             * @since Java 3D 1.2.1
101:             */
102:            public MouseZoom(Component c) {
103:                super (c, 0);
104:            }
105:
106:            /**
107:             * Creates a zoom behavior that uses AWT listeners and behavior
108:             * posts rather than WakeupOnAWTEvent.  The behaviors is added to
109:             * the specified Component and works on the given TransformGroup.
110:             * @param c The Component to add the MouseListener and
111:             * MouseMotionListener to.  A null component can be passed to specify
112:             * the behavior should use listeners.  Components can then be added
113:             * to the behavior with the addListener(Component c) method.
114:             * @param transformGroup The TransformGroup to operate on.
115:             * @since Java 3D 1.2.1
116:             */
117:            public MouseZoom(Component c, TransformGroup transformGroup) {
118:                super (c, transformGroup);
119:            }
120:
121:            /**
122:             * Creates a zoom behavior that uses AWT listeners and behavior
123:             * posts rather than WakeupOnAWTEvent.  The behavior is added to the
124:             * specified Component.  A null component can be passed to specify
125:             * the behavior should use listeners.  Components can then be added
126:             * to the behavior with the addListener(Component c) method.
127:             * Note that this behavior still needs a transform
128:             * group to work on (use setTransformGroup(tg)) and the transform
129:             * group must add this behavior.
130:             * @param flags interesting flags (wakeup conditions).
131:             * @since Java 3D 1.2.1
132:             */
133:            public MouseZoom(Component c, int flags) {
134:                super (c, flags);
135:            }
136:
137:            public void initialize() {
138:                super .initialize();
139:                if ((flags & INVERT_INPUT) == INVERT_INPUT) {
140:                    z_factor *= -1;
141:                    invert = true;
142:                }
143:            }
144:
145:            /**
146:             * Return the y-axis movement multipler.
147:             **/
148:            public double getFactor() {
149:                return z_factor;
150:            }
151:
152:            /**
153:             * Set the y-axis movement multipler with factor.
154:             **/
155:            public void setFactor(double factor) {
156:                z_factor = factor;
157:            }
158:
159:            public void processStimulus(Enumeration criteria) {
160:                WakeupCriterion wakeup;
161:                AWTEvent[] events;
162:                MouseEvent evt;
163:                // 	int id;
164:                // 	int dx, dy;
165:
166:                while (criteria.hasMoreElements()) {
167:                    wakeup = (WakeupCriterion) criteria.nextElement();
168:                    if (wakeup instanceof  WakeupOnAWTEvent) {
169:                        events = ((WakeupOnAWTEvent) wakeup).getAWTEvent();
170:                        if (events.length > 0) {
171:                            evt = (MouseEvent) events[events.length - 1];
172:                            doProcess(evt);
173:                        }
174:                    }
175:
176:                    else if (wakeup instanceof  WakeupOnBehaviorPost) {
177:                        while (true) {
178:                            synchronized (mouseq) {
179:                                if (mouseq.isEmpty())
180:                                    break;
181:                                evt = (MouseEvent) mouseq.remove(0);
182:                                // consolodate MOUSE_DRAG events
183:                                while ((evt.getID() == MouseEvent.MOUSE_DRAGGED)
184:                                        && !mouseq.isEmpty()
185:                                        && (((MouseEvent) mouseq.get(0))
186:                                                .getID() == MouseEvent.MOUSE_DRAGGED)) {
187:                                    evt = (MouseEvent) mouseq.remove(0);
188:                                }
189:                            }
190:                            doProcess(evt);
191:                        }
192:                    }
193:
194:                }
195:                wakeupOn(mouseCriterion);
196:            }
197:
198:            void doProcess(MouseEvent evt) {
199:                int id;
200:                int dx, dy;
201:
202:                processMouseEvent(evt);
203:
204:                if (((buttonPress) && ((flags & MANUAL_WAKEUP) == 0))
205:                        || ((wakeUp) && ((flags & MANUAL_WAKEUP) != 0))) {
206:                    id = evt.getID();
207:                    if ((id == MouseEvent.MOUSE_DRAGGED) && evt.isAltDown()
208:                            && !evt.isMetaDown()) {
209:
210:                        x = evt.getX();
211:                        y = evt.getY();
212:
213:                        dx = x - x_last;
214:                        dy = y - y_last;
215:
216:                        if (!reset) {
217:                            transformGroup.getTransform(currXform);
218:
219:                            translation.z = dy * z_factor;
220:
221:                            transformX.set(translation);
222:
223:                            if (invert) {
224:                                currXform.mul(currXform, transformX);
225:                            } else {
226:                                currXform.mul(transformX, currXform);
227:                            }
228:
229:                            transformGroup.setTransform(currXform);
230:
231:                            transformChanged(currXform);
232:
233:                            if (callback != null)
234:                                callback.transformChanged(
235:                                        MouseBehaviorCallback.ZOOM, currXform);
236:
237:                        } else {
238:                            reset = false;
239:                        }
240:
241:                        x_last = x;
242:                        y_last = y;
243:                    } else if (id == MouseEvent.MOUSE_PRESSED) {
244:                        x_last = evt.getX();
245:                        y_last = evt.getY();
246:                    }
247:                }
248:            }
249:
250:            /**
251:             * Users can overload this method  which is called every time
252:             * the Behavior updates the transform
253:             *
254:             * Default implementation does nothing
255:             */
256:            public void transformChanged(Transform3D transform) {
257:            }
258:
259:            /**
260:             * The transformChanged method in the callback class will
261:             * be called every time the transform is updated
262:             */
263:            public void setupCallback(MouseBehaviorCallback callback) {
264:                this.callback = callback;
265:            }
266:        }
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