Name: skT88420 Date: 07/21/99


/*
Program to illustrate the Column-dragging bug.

Create a JTable with at least two columns. Make one column much
wider than the other. Drag the smaller column to reorder the
columns. As long as there is a partial overlap, the smaller
column will be visible. As soon as it overlaps completely, the
column that I'm dragging will disappear. It won't reappear until
I reach the point where there is only partial overlap.

This test program illustrates the problem. Run the program and
drag column A slowly over column B. Once the two columns overlap
completely, column A will vanish. It will reappear on either
side of B, as soon as the overlap is only a partial overlap.
*/

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

public class DragBug
{
  public static void main(String[] args)
  {
    JFrame mf = new JFrame("Column Dragging Bug");
    WindowListener wl = new WindowAdapter()
    {
      public void windowClosing(WindowEvent evt) { System.exit(0); }
    };
    mf.addWindowListener(wl);
    mf.setBounds(10, 10, 400, 400);
    System.out.println("Java version " + System.getProperty("java.version"));
    JTable theTable = new JTable(new DragBugModel());
    theTable.getColumnModel().getColumn(0).setPreferredWidth(30);
    theTable.getColumnModel().getColumn(1).setPreferredWidth(250);
    JScrollPane scroller = new JScrollPane(theTable);
    mf.getContentPane().add(scroller);
    mf.show();
  }

  private static class DragBugModel extends AbstractTableModel
  {
    public int getRowCount() { return 3; }
    public int getColumnCount() { return 2; }
    public Object getValueAt(int row, int col) { return ""; }

    DragBugModel() { super(); }
  }
}
(Review ID: 88156)
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