FULL PRODUCT VERSION :
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
doesn't matter

A DESCRIPTION OF THE PROBLEM :

synopsis says it all: table.rowAtPoint(new Point(<negativevalue>, somevalue) returns 0 instead of -1. This happens for

-1 >= <negativeValue> > -table.getRowHeight()

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run unittest


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/*
 * $Id: JXTreeTable.java,v 1.4 2005/05/31 11:14:41 kleopatra Exp $
 *
 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 */

import java.awt.Point;

import javax.swing.JTable;

import junit.framework.TestCase;

/**
 * @author Jeanette Winzenburg, Berlin
 */
public class JTableIssues extends TestCase {

    public void testTableRowAtNegativePoint() {
        JTable treeTable = new JTable(1, 4);
        int negativeYRowHeight = - treeTable.getRowHeight();
        int negativeYRowHeightPlusOne = negativeYRowHeight + 1;
        int negativeYMinimal = -1;
        // just outside of negative row before first row
        assertEquals("negative y location rowheight " + negativeYRowHeight + " must return row -1",
                -1, treeTable.rowAtPoint(new Point(-1, negativeYRowHeight)));
        // just inside of negative row before first row
        assertEquals("negative y location " + negativeYRowHeightPlusOne +" must return row -1",
                -1, treeTable.rowAtPoint(new Point(-1, negativeYRowHeightPlusOne)));
        // just outside of first row
        assertEquals("minimal negative y location must return row -1",
                -1, treeTable.rowAtPoint(new Point(-1, negativeYMinimal)));
        
    }

}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :

subclass JTable (done in JXTable of SwingLabs SwingX):

    /**
     * workaround bug in JTable (negative y is mapped to row 0).
     */
    public int rowAtPoint(Point point) {
        if (point.y < 0) return -1;
        return super.rowAtPoint(point);
    }
###@###.### 2005-06-28 13:31:36 GMT