Name: md23716 Date: 09/04/2000

When selecting a cell in a JTable using 'control-click',
the selected cells are alternately highlighted and reset.
For example, if 5 cells are already highlighted, and a
6th is selected with ctrl-click, then the highlighting
disappears for all 6 cells. If a 7th cell is then selected
with a further ctrl-click, then all 7 cells become
highlighted, and so on.

This behaviour is the same on 1.3 and 1.4beta

import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
import java.util.EventObject.*;

public class TableDemo extends JFrame
{
   private boolean DEBUG = true;

   public TableDemo()
   {
      super("TableDemo");

      MyTableModel myModel = new MyTableModel();
      JTable table = new JTable(myModel);
      table.setPreferredScrollableViewportSize(new Dimension(500, 500));
      table.setCellSelectionEnabled(true); //<-- causes non-contiguous selectio
n problem
      table.setRowSelectionAllowed(true);
      table.setColumnSelectionAllowed(false);
      table.setAutoResizeMode(0);
      // table.setShowHorizontalLines(false);
      // System.out.println(table.AccessibleJTable.AccessibleJTableCell.isFocusT
raversable());

      //Create the scroll pane and add the table to it.
      JScrollPane scrollPane = new JScrollPane(table);
      scrollPane.createHorizontalScrollBar();

      //Add the scroll pane to this window.
      getContentPane().add(scrollPane, BorderLayout.CENTER);

      addWindowListener(new WindowAdapter()
                        {
                           public void windowClosing(WindowEvent e)
                           {
                              System.exit(0);
                           }
                        });
   }

   class MyTableModel extends AbstractTableModel
   {
      final String[] columnNames = {
         "One",
         "Two",
         "Three",
         "Four",
         "Five",
         "Six",
         "Seven",
         "Eght",
         "Nine",
         "Ten",
         "Eleven",
         "Eleven"

      };
      final Object[][] data = {
         {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false),
new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campio
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)},
         {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false),
new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campio
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)},
         {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false),
new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campio
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)},
         {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false),
new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campio
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)},
         {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false),
new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campio
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)},
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)},
         {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false),
new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campio
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)},
         {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false),
new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campio
ne","Snowboarding", new Integer(5), new Boolean(false),new Integer(6), "More", "
Stuff", "NINE", "IT", new Boolean(true),"Mary", "Campione","Snowboarding", new I
nteger(5), new Boolean(false),new Integer(6), "More", "Stuff", "NINE", "IT", new
 Boolean(true),"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(fa
lse),new Integer(6), "More", "Stuff", "NINE", "IT", new Boolean(true)}
      };

      public int getColumnCount()
      {
         return columnNames.length;
      }

      public int getRowCount()
      {
         return data.length;
      }

      public String getColumnName(int col)
      {
         return columnNames[col];
      }

      public Object getValueAt(int row, int col)
      {
         return data[row][col];
      }

      /*
       * JTable uses this method to determine the default renderer/
       * editor for each cell. If we didn't implement this method,
       * then the last column would contain text ("true"/"false"),
       * rather than a check box.
       */
      public Class getColumnClass(int c)
      {
         return getValueAt(0, c).getClass();
      }

      /*
       * Don't need to implement this method unless your table's
       * editable.
       */
      public boolean isCellEditable(int row, int col)
      {
         //Note that the data/cell address is constant,
         //no matter where the cell appears onscreen.
         if (col < 2)
         {
            return false;
         }
         else
         {
            return true;
         }
      }

      /*
       * Don't need to implement this method unless your table's
       * data can change.
       */
      public void setValueAt(Object value, int row, int col)
      {
         if (DEBUG)
         {
            System.out.println("Setting value at " + row + "," + col
                               + " to " + value
                               + " (an instance of "
                               + value.getClass() + ")");
         }

         if (data[0][col] instanceof Integer)
         {
            //If we don't do something like this, the column
            //switches to contain Strings.
            //XXX: See TableEditDemo.java for a better solution!!!
            try
            {
               data[row][col] = new Integer((String)value);
               fireTableCellUpdated(row, col);
            }
            catch (NumberFormatException e)
            {
               JOptionPane.showMessageDialog(TableDemo.this,
                                             "The \"" + getColumnName(col)
                                             + "\" column accepts only integer v
alues.");
            }
         }
         else
         {
            data[row][col] = value;
            fireTableCellUpdated(row, col);
         }

         if (DEBUG)
         {
            System.out.println("New value of data:");
         }
      }

      private void printDebugData()
      {
         int numRows = getRowCount();
         int numCols = getColumnCount();

         for (int i=0; i < numRows; i++)
         {
            System.out.print(" row " + i + ":");
            for (int j=0; j < numCols; j++)
            {
               System.out.print(" " + data[i][j]);
            }
            System.out.println();
         }
         System.out.println("--------------------------");
      }
   }

   public static void main(String[] args)
   {
      TableDemo frame = new TableDemo();
      frame.pack();
      frame.setVisible(true);
   }
}



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