We would like to know how to forward mouseMoved() events to JTree nodes.
import java.awt.BorderLayout; import java.awt.Component; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; /*from w w w . j av a 2 s .c om*/ import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.DefaultTreeModel; import javax.swing.tree.TreeCellRenderer; import javax.swing.tree.TreePath; public class Main { public static void main(String[] args) { DefaultMutableTreeNode root = new DefaultMutableTreeNode(Boolean.TRUE); DefaultMutableTreeNode child1 = new DefaultMutableTreeNode(Boolean.FALSE); DefaultMutableTreeNode child2 = new DefaultMutableTreeNode(Boolean.FALSE); root.add(child1); root.add(child2); DefaultTreeModel model = new DefaultTreeModel(root); JTree tree = new JTree(model); tree.setCellRenderer(new TreeRenderer()); tree.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { TreePath pathForLocation = tree.getPathForLocation(e.getX(), e.getY()); Object lastPathComponent = pathForLocation.getLastPathComponent(); if (lastPathComponent instanceof DefaultMutableTreeNode) { Boolean oldObject = (Boolean) ((DefaultMutableTreeNode) lastPathComponent) .getUserObject(); ((DefaultMutableTreeNode) lastPathComponent) .setUserObject(!oldObject); model.nodeChanged((DefaultMutableTreeNode) lastPathComponent); } } }); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(new BorderLayout()); frame.getContentPane().add(tree, BorderLayout.CENTER); frame.setSize(800, 600); frame.setVisible(true); } } class TreeRenderer implements TreeCellRenderer { private final JCheckBox checkbox = new JCheckBox(); @Override public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) { DefaultMutableTreeNode node = (DefaultMutableTreeNode) value; checkbox.setSelected((Boolean) node.getUserObject()); checkbox.setText("Row:" + row); return checkbox; } }