tim/prune/threedee/WindowFactory.java

   1 package tim.prune.threedee;
   2
   3 import javax.swing.JFrame;
   4
   5 /**
   6  * Factory class for getting a Window
   7  */
   8 public abstract class WindowFactory
   9 {
  10         private static Java3DWindow _window = null;
  11
  12         /**
  13          * Get a Window object
  14          * @param inFrame parent frame
  15          * @return object if available, otherwise null
  16          */
  17         public static ThreeDWindow getWindow(JFrame inFrame)
  18         {
  19                 if (isJava3dEnabled())
  20                 {
  21                         if (_window == null) {
  22                                 _window = new Java3DWindow(inFrame);
  23                         }
  24                         else {
  25                                 _window.dispose();
  26                         }
  27                         return _window;
  28                 }
  29                 return null;
  30         }
  31
  32
  33         /**
  34          * @return true if 3d capability is installed
  35          */
  36         public static boolean isJava3dEnabled()
  37         {
  38                 boolean has3d = false;
  39                 try
  40                 {
  41                         Class<?> universeClass = Class.forName("com.sun.j3d.utils.universe.SimpleUniverse");
  42                         has3d = (universeClass != null);
  43                 }
  44                 catch (ClassNotFoundException e)
  45                 {
  46                         // no java3d classes available
  47                 }
  48                 catch (NoClassDefFoundError nfe)
  49                 {
  50                         // no java3d classes available
  51                 }
  52                 catch (UnsatisfiedLinkError ule)
  53                 {
  54                         // java3d classes found but no native components
  55                 }
  56                 return has3d;
  57         }
  58
  59 }