/*
 *	@(#)PickRotateBehavior.java 1.15 98/08/10 14:57:59
 *
 * Copyright (c) 1996-1998 Sun Microsystems, Inc. All Rights Reserved.
 * Revised by Sean Miller
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 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
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 * which is disparaging to Sun.
 *
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//package com.sun.j3d.utils.behaviors.picking;
import com.sun.j3d.utils.behaviors.picking.*;
import com.sun.j3d.utils.behaviors.mouse.*;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.io.*;
/**
 * A mouse behavior that allows user to pick and drag scene graph objects.
 * Common usage: 
 * <p>
 * 1. Create your scene graph.
 * <p>
 * 2. Create this behavior with root and canvas.
 * <p>
 * <blockquote><pre>
 *	PickRotateBehavior behavior = new PickRotateBehavior(canvas, root, bounds);
 *      root.addChild(behavior);
 * </pre></blockquote>
 * <p>
 * The above behavior will monitor for any picking events on
 * the scene graph (below root node) and handle mouse drags on pick hits.
 * Note the root node can also be a subgraph node of the scene graph (rather
 * than the topmost).
 */


public class PickRotateBehavior extends PickMouseBehavior implements MouseBehaviorCallback {
  MouseRotate drag;
  sjmLoad my_sjmLoad;  
  int pickMode = PickObject.USE_BOUNDS;
  private PickingCallback callback=null;
  private TransformGroup currentTG;
  TransformGroup the_transform;

  /**
   * Creates a pick/rotate behavior that waits for user mouse events for
   * the scene graph. This method has its pickMode set to BOUNDS picking. 
   * @param root   Root of your scene graph.
   * @param canvas Java 3D drawing canvas.
   * @param bounds Bounds of your scene.
   **/

  public PickRotateBehavior(BranchGroup root, TransformGroup the_transform, sjmLoad my_sjmLoad, Bounds bounds){
    super(my_sjmLoad.the_display, root, bounds);
 	 this.the_transform=the_transform;
	 this.my_sjmLoad=my_sjmLoad;
    drag = new MouseRotate(MouseRotate.MANUAL_WAKEUP);
    drag.setTransformGroup(currGrp);
    currGrp.addChild(drag);
    drag.setSchedulingBounds(bounds);
    this.setSchedulingBounds(bounds);
  }

  /**
   * Creates a pick/rotate behavior that waits for user mouse events for
   * the scene graph.
   * @param root   Root of your scene graph.
   * @param canvas Java 3D drawing canvas.
   * @param bounds Bounds of your scene.
   * @param pickMode specifys PickObject.USE_BOUNDS or PickObject.USE_GEOMETRY.
   * Note: If pickMode is set to PickObject.USE_GEOMETRY, all geometry object in 
   * the scene graph that allows pickable must have its ALLOW_INTERSECT bit set. 
   **/

  public PickRotateBehavior(BranchGroup root, TransformGroup the_transform, sjmLoad my_sjmLoad, Bounds bounds, 
			    int pickMode){
    super(my_sjmLoad.the_display, root, bounds);
 	 this.the_transform=the_transform;
	 this.my_sjmLoad=my_sjmLoad;
    drag = new MouseRotate(MouseRotate.MANUAL_WAKEUP);
    drag.setTransformGroup(currGrp);
    currGrp.addChild(drag);
    drag.setSchedulingBounds(bounds);
    this.setSchedulingBounds(bounds);
    this.pickMode = pickMode;
  }

  /**
   * Sets the pickMode component of this PickRotateBehavior to the value of
   * the passed pickMode.
   * @param pickMode the pickMode to be copied.
   **/  


  public void setPickMode(int pickMode) {
    this.pickMode = pickMode;
  }

 /**
   * Return the pickMode component of this PickRotateBehavior.
   **/ 

  public int getPickMode() {
    return pickMode;
  }

  /**
   * Update the scene to manipulate any nodes. This is not meant to be 
   * called by users. Behavior automatically calls this. You can call 
   * this only if you know what you are doing.
   * 
   * @param xpos Current mouse X pos.
   * @param ypos Current mouse Y pos.
   **/
  public void updateScene(int xpos, int ypos){
    TransformGroup tg = null;

	  if (!mevent.isMetaDown() && !mevent.isAltDown()){     

      //      tg = (TransformGroup) pickScene.pickNode(pickScene.pickClosest(xpos, ypos),
      //				       PickObject.TRANSFORM_GROUP);
		if (mevent.isShiftDown()) {
      tg =(TransformGroup)pickScene.pickNode(pickScene.pickClosest(xpos, ypos,pickMode),
					     PickObject.TRANSFORM_GROUP);
		} else {
			tg=the_transform;
		}
      // Make sure the selection exists and is movable. 
      if ((tg != null) && 
	  (tg.getCapability(TransformGroup.ALLOW_TRANSFORM_READ)) && 
	  (tg.getCapability(TransformGroup.ALLOW_TRANSFORM_WRITE))){
			drag.setTransformGroup(tg);
			drag.wakeup();
			currentTG = tg;my_sjmLoad.isObjectChanged((sjmTransformGroup)tg);
      } else if (callback!=null)
			callback.transformChanged( PickingCallback.NO_PICK, null );
    }
	
  }

  /**
    * Callback method from MouseRotate
    * This is used when the Picking callback is enabled
    */
  public void transformChanged( int type, Transform3D transform ) {
      callback.transformChanged( PickingCallback.ROTATE, currentTG );
  }
 
  /**
    * Register the class @param callback to be called each
    * time the picked object moves
    */
  public void setupCallback( PickingCallback callback ) {
      this.callback = callback;
      if (callback==null)
          drag.setupCallback( null );
      else
          drag.setupCallback( this );
  }
}