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Kevin · Guest

I ssaw a similar message on another group, but it didn't get a
response, but I'm sure it is more of a 3D issue.

I create a JFrame and display it on the first screen. Everything
works well until I move the frame to the 2nd screen. Redrawing the
universe produces the following exception:

Exception in thread "AWT-EventQueue-0"
java.lang.IllegalArgumentException: adding a container to a container
on a different GraphicsDevice
at java.awt.Component.checkGD(Unknown Source)
at java.awt.Container.addImpl(Unknown Source)
at java.awt.Container.add(Unknown Source)
at com.issinc.sandbox.Java3DTest.redrawPanel(Java3DTest.java:95)
at com.issinc.sandbox.Java3DTest.actionPerformed(Java3DTest.java:144)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
...

I've tried creating and getting the GraphicsConfiguration several
ways, but haven't found the right thing yet.

I'm getting this in our large application, but I recreated the
problemin the folowing code, based on the HelloUniverse example:

import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.ColorCube;
import javax.media.j3d.*;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.vecmath.*;

import java.awt.FlowLayout;
import java.awt.GraphicsConfiguration;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
* Simple Java 3D example program to display a spinning cube.
*/
public class Java3DTest extends javax.swing.JFrame implements
ActionListener {

private javax.swing.JPanel drawingPanel;
private JPanel buttonPanel;
private JButton redrawButton;

private SimpleUniverse univ = null;
private BranchGroup scene = null;

private Canvas3D c;

public BranchGroup createSceneGraph() {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();

// Create the TransformGroup node and initialize it to the
// identity. Enable the TRANSFORM_WRITE capability so that
// our behavior code can modify it at run time. Add it to
// the root of the subgraph.
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot.addChild(objTrans);

// Create a simple Shape3D node; add it to the scene graph.
objTrans.addChild(new ColorCube(0.4));

// Create a new Behavior object that will perform the
// desired operation on the specified transform and add
// it into the scene graph.
Transform3D yAxis = new Transform3D();

yAxis.rotX(Math.PI/8.0d);

Alpha rotationAlpha = new Alpha(-1, 4000);

RotationInterpolator rotator =
new RotationInterpolator(rotationAlpha, objTrans, yAxis,
0.0f, (float) Math.PI*2.0f);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
rotator.setSchedulingBounds(bounds);
objRoot.addChild(rotator);

// Have Java 3D perform optimizations on this scene graph.
objRoot.compile();

return objRoot;
}

private Canvas3D createUniverse() {
// Get the preferred graphics configuration for the default screen
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();

// Create a Canvas3D using the preferred configuration
c = new Canvas3D(config);

// Create simple universe with view branch
univ = new SimpleUniverse(c);

// This will move the ViewPlatform back a bit so the
// objects in the scene can be viewed.
univ.getViewingPlatform().setNominalViewingTransform();

// Ensure at least 5 msec per frame (i.e., < 200Hz)
univ.getViewer().getView().setMinimumFrameCycleTime(5);

return c;
}

private void redrawPanel() {
// Create Canvas3D and SimpleUniverse; add canvas to drawing
panel
c = createUniverse();

// Create the content branch and add it to the universe
scene = createSceneGraph();
univ.addBranchGraph(scene);
drawingPanel.add(c, java.awt.BorderLayout.CENTER);
drawingPanel.revalidate();
}

/**
* Creates new form HelloUniverse
*/
public Java3DTest() {
// Initialize the GUI components
initComponents();
}

//
----------------------------------------------------------------

private void initComponents() {
drawingPanel = new javax.swing.JPanel();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Java 3D Test");
drawingPanel.setLayout(new java.awt.BorderLayout());

drawingPanel.setPreferredSize(new java.awt.Dimension(250,
250));
getContentPane().add(drawingPanel,
java.awt.BorderLayout.CENTER);

// Add a button to redraw it...
buttonPanel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
redrawButton = new JButton("Redraw");

redrawButton.addActionListener(this);

buttonPanel.add(redrawButton);
getContentPane().add(buttonPanel,
java.awt.BorderLayout.SOUTH);

pack();
}

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Java3DTest().setVisible(true);
}
});
}

public void actionPerformed(ActionEvent arg0)
{
redrawPanel();
}
}

Any help is greatly appreciated.