location of a selected row in a JTable

[jefff willis]

hey,

I need to pop up a frame right under a selected row in my JTable.

The table is in a scrollPane. Any idea how I can get the location of my
selected row so that I can use that information to position my pop up?

thanks.

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
 
public class LocationTest
{
    JDialog dialog;
    JTable table;
    JFrame f;
 
    public LocationTest()
    {
        createDialog();
        f = new JFrame();
        table = getTable();
        ListSelectionModel model = table.getSelectionModel();
        model.addListSelectionListener(new TableSelector(this));
        model.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new JScrollPane(table));
        f.pack();
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    private void createDialog()
    {
        dialog = new JDialog(new Frame(), "location");
        dialog.setSize(300,50);
    }
 
    private JTable getTable()
    {
        String[] headers = { "column 1", "column 2", "column 3", "column 4" };
        int rows = 16, cols = 4;
        String[][] data = new String[rows][cols];
        for(int row = 0; row < rows; row++)
            for(int col = 0; col < cols; col++)
                data[row][col] = "item " + (row * cols + col + 1);
        return new JTable(data, headers);
    }
 
    public void showDialog(Point p)
    {
        dialog.setLocation(p.x, p.y);
        dialog.setVisible(true);
    }
 
    public static void main(String[] args)
    {
        new LocationTest();
    }
}
 
class TableSelector implements ListSelectionListener
{
    LocationTest test;
    JTable table;
    JFrame frame;
 
    public TableSelector(LocationTest lt)
    {
        test = lt;
        table = test.table;
        frame = test.f;
    }
 
    public void valueChanged(ListSelectionEvent e)
    {
        if(!e.getValueIsAdjusting())
        {
            int row = table.getSelectedRow();
            int col = table.getSelectedColumn();
            Rectangle r = table.getCellRect(row, col, true);
            Point p = new Point(r.x, r.y + r.height);  // lower left of cell
            SwingUtilities.convertPointToScreen(p, table);
            test.showDialog(p);
 
            // verify the selected cell and draw its origin
            System.out.println(table.getValueAt(row, col));
            Graphics g = frame.getGraphics();
            g.setColor(Color.red);
            p = SwingUtilities.convertPoint(table, r.x, r.y, frame);
            g.fillOval(p.x-2, p.y-2, 4, 4);
        }
    }
}

[jefff willis]

Craig,

Perfect. Exactly what I needed. Nice job.

-jw