ConfigurationTreeModel model = new ConfigurationTreeModel(o);
myTree = new JTree(model);
if (myTree.getUI().getClass().getName().contains("apple.laf")) {
AquaTreeUI aui = new AquaTreeUI();
myTree.setUI(aui);
aui.setRowHeight(0); //must be done after setUI(...)
}
myTree.setScrollsOnExpand(true);
this.setViewportView(myTree);