Hi everyone,
I try to add an OpenHandler on a tree to lazilly load the tree
structure. But when I try to retrieve the node with
OpenEvent.getTarget().getUserObject() I always get a null reference.
I don't understand why the userObject is null.. Please help me.
...
private final Tree hierarchy = new Tree();
public void onModuleLoad() {
hierarchy.addOpenHandler(new OpenHandler<TreeItem>() {
@Override
public void onOpen(final OpenEvent<TreeItem> event) {
TreeItem item = event.getTarget();
Object userObject = item.getUserObject();
// userObject is null !!
}
...
}
}
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