Code
class CheckBoxNodeEditor extends TriStateCheckBox implements TreeCellEditor {
private DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
private final JPanel panel = new JPanel(new BorderLayout());
private String str = null;
public CheckBoxNodeEditor() {
super();
this.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
// System.out.println("actionPerformed: stopCellEditing");
stopCellEditing();
}
});
panel.setFocusable(false);
panel.setRequestFocusEnabled(false);
panel.setOpaque(false);
panel.add(this, BorderLayout.WEST);
this.setOpaque(false);
}
@Override public Component getTreeCellEditorComponent(
JTree tree, Object value, boolean isSelected,
boolean expanded, boolean leaf, int row) {
JLabel l = (JLabel) renderer.getTreeCellRendererComponent(
tree, value, true, expanded, leaf, row, true);
l.setFont(tree.getFont());
if (value instanceof DefaultMutableTreeNode) {
this.setEnabled(tree.isEnabled());
this.setFont(tree.getFont());
Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
if (userObject instanceof CheckBoxNode) {
CheckBoxNode node = (CheckBoxNode) userObject;
if (node.status == Status.INDETERMINATE) {
setIcon(new IndeterminateIcon());
} else {
setIcon(null);
}
l.setText(node.label);
setSelected(node.status == Status.SELECTED);
str = node.label;
}
// panel.add(this, BorderLayout.WEST);
panel.add(l);
return panel;
}
return l;
}
@Override public Object getCellEditorValue() {
return new CheckBoxNode(str, isSelected() ? Status.SELECTED : Status.DESELECTED);
}
@Override public boolean isCellEditable(EventObject e) {
if (e instanceof MouseEvent && e.getSource() instanceof JTree) {
MouseEvent me = (MouseEvent) e;
JTree tree = (JTree) e.getSource();
TreePath path = tree.getPathForLocation(me.getX(), me.getY());
Rectangle r = tree.getPathBounds(path);
if (r == null) {
return false;
}
Dimension d = getPreferredSize();
r.setSize(new Dimension(d.width, r.height));
if (r.contains(me.getPoint())) {
return true;
}
}
return false;
}
@Override public void updateUI() {
super.updateUI();
setName("Tree.cellEditor");
if (panel != null) {
//panel.removeAll(); // ??? Change to Nimbus LnF, JDK 1.6.0
panel.updateUI();
//panel.add(this, BorderLayout.WEST);
}
// ???#1: JDK 1.6.0 bug??? @see 1.7.0 DefaultTreeCellRenderer#updateUI()
// if (System.getProperty("java.version").startsWith("1.6.0")) {
// renderer = new DefaultTreeCellRenderer();
// }
}
// ...
References
