gov/nasa/worldwind/PickedObjectList.java

   1 /*
   2 Copyright (C) 2001, 2006 United States Government
   3 as represented by the Administrator of the
   4 National Aeronautics and Space Administration.
   5 All Rights Reserved.
   6 */
   7 package gov.nasa.worldwind;
   8
   9 /**
  10  * @author tag
  11  * @version $Id$
  12  */
  13 public class PickedObjectList extends java.util.ArrayList<PickedObject>
  14 {
  15     public PickedObjectList()
  16     {
  17     }
  18
  19     public PickedObjectList(PickedObjectList list) // clone a shallow copy
  20     {
  21         super(list);
  22     }
  23
  24     public PickedObject getTopPickedObject()
  25     {
  26         int size = this.size();
  27
  28         if(1 < size)
  29         {
  30             for (PickedObject po : this)
  31             {
  32                 if (po.isOnTop())
  33                     return po;
  34             }
  35         }
  36
  37         if(0 < size)
  38         {   // if we are here, then no objects were mark as 'top'
  39             return this.get(0);
  40         }
  41
  42         return null;
  43     }
  44
  45     public Object getTopObject()
  46     {
  47         PickedObject po = this.getTopPickedObject();
  48         return po != null ? po.getObject() : null;
  49     }
  50
  51     public PickedObject getTerrainObject()
  52     {
  53         for (PickedObject po : this)
  54         {
  55             if (po.isTerrain())
  56                 return po;
  57         }
  58
  59         return null;
  60     }
  61 }