GraphStructureChangeListener (3D 1.5.2)

```
public interface GraphStructureChangeListener
```
Listener interface for monitoring structural changes to live scene graphs. BranchGroup additions, removals and moves are reported.

Since:

Java 3D 1.4

See Also:

VirtualUniverse.addGraphStructureChangeListener(javax.media.j3d.GraphStructureChangeListener)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`branchGroupAdded(java.lang.Object parent, BranchGroup child)`	Invoked when a branch group is added.
`void`	`branchGroupMoved(java.lang.Object oldParent, java.lang.Object newParent, BranchGroup child)`	Invoked when a branch group is moved.
`void`	`branchGroupRemoved(java.lang.Object parent, BranchGroup child)`	Invoked when a branch group is removed.

- Method Detail
  - branchGroupAdded
```
void branchGroupAdded(java.lang.Object parent,
                      BranchGroup child)
```
    Invoked when a branch group is added. Called just before the child is added to the parent. Parent can be either a BranchGroup or a Locale.
    
    Parameters:
    
    parent - the parent of the child being added
    
    child - the child being added
  - branchGroupRemoved
```
void branchGroupRemoved(java.lang.Object parent,
                        BranchGroup child)
```
    Invoked when a branch group is removed. Called just after the child has been removed from the parent. Parent can be either a BranchGroup or a Locale.
    
    Parameters:
    
    parent - the parent of the child being added
    
    child - the child being added
  - branchGroupMoved
```
void branchGroupMoved(java.lang.Object oldParent,
                      java.lang.Object newParent,
                      BranchGroup child)
```
    Invoked when a branch group is moved. Called after a child has been moved to it's new parent. This call differs from the other methods in that the child is live when this method is called.
    
    Parameters:
    
    oldParent - the original parent of the child being moved
    
    newParent - the new parent of the child being moved
    
    child - the child being moved