super("Tree Event Demo");
setSize(300,200);
setDefaultCloseOperation(EXIT_ON_CLOSE);
EEL eel = EEL.getInstance();
eel.addGui();
tree = new JTree();
tree.setExpandsSelectedPaths(true);
tree.setEditable(true);
getContentPane().add(new JScrollPane(tree), BorderLayout.CENTER);
tree.addTreeSelectionListener(eel);
tree.addTreeSelectionListener(this);
tree.addTreeExpansionListener(eel);
tree.addTreeWillExpandListener(eel);
tree.addPropertyChangeListener(eel);
tree.getModel().addTreeModelListener(eel);
addB = new JButton("Add a node");
deleteB = new JButton("Delete a node");
JPanel buttonP = new JPanel();
buttonP.add(addB);
buttonP.add(deleteB);
getContentPane().add(buttonP, BorderLayout.SOUTH);
addB.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
String nodeName = JOptionPane.showInputDialog("New node name:");
if (leadSelection != null) {
leadSelection.add(new DefaultMutableTreeNode(nodeName));
((DefaultTreeModel)tree.getModel()).reload(leadSelection);
}
else {
JOptionPane.showMessageDialog(TreeEvents.this, "No Parent...");
}
}
});
deleteB.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if (leadSelection != null) {
DefaultMutableTreeNode parent =
(DefaultMutableTreeNode) leadSelection.getParent();
if (parent == null) {
JOptionPane.showMessageDialog(TreeEvents.this,
"Can't delete root");
}
else {
parent.remove(leadSelection);
leadSelection = null;
((DefaultTreeModel)tree.getModel()).reload(parent);
}
}
else {
JOptionPane.showMessageDialog(TreeEvents.this, "No Selection...");
}
}
});
eel.showDialog();
