[SOLVED] Display tooltip information when a node from JTree is clicked

[javanewbie]

Upon clicking a specific node from the JTree, a tooltip will display certain information coming from a specific cell (eg. Column 2, Row 5) displayed in Jtable.


any suggestions?

[hardwired]

Time to get creative.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import javax.swing.tree.*;

public class TipTest extends MouseAdapter {
    JTree tree;
    JWindow toolTip;
    JLabel tipLabel;
    Rectangle pathBounds;
    JTable table;

    public TipTest(JFrame f) {
        toolTip = new JWindow(f);
        toolTip.setBackground(UIManager.getColor("ToolTip.background"));
        tipLabel = new JLabel();
        toolTip.add(tipLabel);
    }

    public void mousePressed(MouseEvent e) {
        Point p= e.getPoint();
        TreePath path = tree.getPathForLocation(p.x, p.y);
        if(path == null) return;
        DefaultMutableTreeNode node =
            (DefaultMutableTreeNode)path.getLastPathComponent();
        //System.out.printf("node = %s%n", node);
        int row = table.getSelectedRow();
        int col = table.getSelectedColumn();
        if(row != -1 && col != -1) {
            String cellStr = (String)table.getValueAt(row, col);
            tipLabel.setText(cellStr);
            toolTip.pack();
            SwingUtilities.convertPointToScreen(p, tree);
            toolTip.setLocation(p.x+5, p.y-toolTip.getHeight());
            toolTip.setVisible(true);
            pathBounds = tree.getPathBounds(path);
        }
    }

    public void mouseMoved(MouseEvent e) {
        if(toolTip.isVisible()) {
            if(!pathBounds.contains(e.getPoint())) {
                toolTip.setVisible(false);
            }
        }
    }

    private JScrollPane getTreeComponent() {
        tree = new JTree();
        expandTree(tree);
        tree.addMouseListener(this);
        tree.addMouseMotionListener(this);
        return new JScrollPane(tree);
    }

    private void expandTree(JTree tree) {
        DefaultMutableTreeNode root =
            (DefaultMutableTreeNode)tree.getModel().getRoot();
        java.util.Enumeration e = root.breadthFirstEnumeration();
        while(e.hasMoreElements()) {
            DefaultMutableTreeNode node =
                (DefaultMutableTreeNode)e.nextElement();
            if(node.isLeaf()) continue;
            int row = tree.getRowForPath(new TreePath(node.getPath()));
            tree.expandRow(row);
        }
    }

    private JScrollPane getTableComponent() {
        table = new JTable(getModel());
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        table.setCellSelectionEnabled(true);
        Dimension d = table.getPreferredSize();
        table.setPreferredScrollableViewportSize(d);
        return new JScrollPane(table);
    }

    private AbstractTableModel getModel() {
        return new AbstractTableModel() {
            public int getRowCount() { return 5; }

            public int getColumnCount() { return 4; }

            public Object getValueAt(int row, int col) {
                return String.valueOf((row+1)) + (col+1);
            }
        };
    }

    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        TipTest test = new TipTest(f);
        f.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        f.add(test.getTreeComponent(), gbc);
        f.add(test.getTableComponent(), gbc);
        f.pack();
        f.setLocation(200,200);
        f.setVisible(true);
    }
}