@Override
public void actionPerformed(ActionEvent evt) {
JCheckBoxMenuItem menuItem = (JCheckBoxMenuItem) evt.getSource();
boolean curState = menuItem.isSelected();
TreePath path = resultTree.getSelectionPath();
DefaultMutableTreeNode operNode = (DefaultMutableTreeNode) path.getLastPathComponent();
HyperSearchOperationNode operNodeObj = (HyperSearchOperationNode) operNode.getUserObject();
if (curState) operNodeObj.cacheResultNodes(operNode);
operNode.removeAllChildren();
if (curState) {
Exception excp = null;
try {
operNodeObj.insertTreeNodes(resultTree, operNode);
} catch (Exception ex) {
operNodeObj.restoreFlatNodes(resultTree, operNode);
menuItem.setSelected(false);
excp = ex;
} finally {
((DefaultTreeModel) resultTree.getModel()).nodeStructureChanged(operNode);
expandAllNodes(operNode);
resultTree.scrollPathToVisible(new TreePath(operNode.getPath()));
}
if (excp != null) throw new RuntimeException(excp);
} else operNodeObj.restoreFlatNodes(resultTree, operNode);
operNodeObj.setTreeViewDisplayed(menuItem.isSelected());
}
