001: /*
002: * $RCSfile: PickZoomBehavior.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 17:20:26 $
042: * $State: Exp $
043: */
044:
045: package com.sun.j3d.utils.picking.behaviors;
046:
047: import com.sun.j3d.utils.picking.*;
048: import com.sun.j3d.utils.behaviors.mouse.*;
049: import java.awt.*;
050: import java.awt.event.*;
051: import java.util.*;
052: import javax.media.j3d.*;
053: import javax.vecmath.*;
054:
055: /**
056: * A mouse behavior that allows user to pick and zoom scene graph objects.
057: * Common usage: 1. Create your scene graph. 2. Create this behavior with
058: * the root and canvas. See PickRotateBehavior for more details.
059: */
060:
061: public class PickZoomBehavior extends PickMouseBehavior implements
062: MouseBehaviorCallback {
063: MouseZoom zoom;
064: private PickingCallback callback = null;
065: private TransformGroup currentTG;
066:
067: /**
068: * Creates a pick/zoom behavior that waits for user mouse events for
069: * the scene graph.
070: * @param root Root of your scene graph.
071: * @param canvas Java 3D drawing canvas.
072: * @param bounds Bounds of your scene.
073: **/
074:
075: public PickZoomBehavior(BranchGroup root, Canvas3D canvas,
076: Bounds bounds) {
077: super (canvas, root, bounds);
078: zoom = new MouseZoom(MouseBehavior.MANUAL_WAKEUP);
079: zoom.setTransformGroup(currGrp);
080: currGrp.addChild(zoom);
081: zoom.setSchedulingBounds(bounds);
082: this .setSchedulingBounds(bounds);
083: }
084:
085: /**
086: * Creates a pick/zoom behavior that waits for user mouse events for
087: * the scene graph.
088: * @param root Root of your scene graph.
089: * @param canvas Java 3D drawing canvas.
090: * @param bounds Bounds of your scene.
091: * @param pickMode specifys PickTool.BOUNDS, PickTool.GEOMETRY or
092: * PickTool.GEOMETRY_INTERSECT_INFO.
093: * @see PickTool#setMode
094: */
095: public PickZoomBehavior(BranchGroup root, Canvas3D canvas,
096: Bounds bounds, int pickMode) {
097: super (canvas, root, bounds);
098: zoom = new MouseZoom(MouseBehavior.MANUAL_WAKEUP);
099: zoom.setTransformGroup(currGrp);
100: currGrp.addChild(zoom);
101: zoom.setSchedulingBounds(bounds);
102: this .setSchedulingBounds(bounds);
103: this .setMode(pickMode);
104: }
105:
106: /**
107: * Update the scene to manipulate any nodes. This is not meant to be
108: * called by users. Behavior automatically calls this. You can call
109: * this only if you know what you are doing.
110: *
111: * @param xpos Current mouse X pos.
112: * @param ypos Current mouse Y pos.
113: **/
114:
115: public void updateScene(int xpos, int ypos) {
116: TransformGroup tg = null;
117:
118: if (mevent.isAltDown() && !mevent.isMetaDown()) {
119:
120: pickCanvas.setShapeLocation(xpos, ypos);
121: PickResult pr = pickCanvas.pickClosest();
122: if ((pr != null)
123: && ((tg = (TransformGroup) pr
124: .getNode(PickResult.TRANSFORM_GROUP)) != null)
125: && (tg
126: .getCapability(TransformGroup.ALLOW_TRANSFORM_READ))
127: && (tg
128: .getCapability(TransformGroup.ALLOW_TRANSFORM_WRITE))) {
129: zoom.setTransformGroup(tg);
130: zoom.wakeup();
131: currentTG = tg;
132: // Need to clean up Issue 123 --- Chien
133: // freePickResult(pr);
134: } else if (callback != null)
135: callback
136: .transformChanged(PickingCallback.NO_PICK, null);
137: }
138: }
139:
140: /**
141: * Callback method from MouseZoom
142: * This is used when the Picking callback is enabled
143: */
144: public void transformChanged(int type, Transform3D transform) {
145: callback.transformChanged(PickingCallback.ZOOM, currentTG);
146: }
147:
148: /**
149: * Register the class @param callback to be called each
150: * time the picked object moves
151: */
152: public void setupCallback(PickingCallback callback) {
153: this.callback = callback;
154: if (callback == null)
155: zoom.setupCallback(null);
156: else
157: zoom.setupCallback(this);
158: }
159: }
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