Switch Selection between 2 JTable?

[Ahmed Aziz]

Hello,

assume that i have 2 JTables in JPanel and each contain one row is it possible to switch selection between these tables

in other words if i select the first table then after that i select the second table the first table will be unselected

this is my attempt but not like what i need

i need to switch selection between the two different tables here in the code when i select one table then select the other table the first table remains selected

  
import java.awt.*;
import javax.swing.table.*;
import javax.swing.*;
 
 class JTables extends JFrame {
   public JTables() 
   {
   	setBounds(0,0,500,500);
   	JPanel pane = new JPanel();
   	pane.setLayout(null);
   	setContentPane(pane);
   	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   	pane.setBounds(0,0,500,500);
   	String [] cols = {"Col1","Col2","Col3"};
   	Object [][] rows = {{"data1","data2","data3"}};
   	
   	JTable table1 = new JTable(rows,cols);
   	JTable table2 = new JTable(rows,cols);
   	JScrollPane scroll1 = new JScrollPane(table1);
   	JScrollPane scroll2 = new JScrollPane(table2);
   	scroll1.setBounds(10,10,300,50);
   	scroll2.setBounds(10,100,300,50);
   	table1.setColumnSelectionAllowed(true);
	table1.setRowSelectionAllowed(true);
	table2.setColumnSelectionAllowed(true);
	table2.setRowSelectionAllowed(true);
                for(int i=0;i<3;i++)
               {
                     TableColumn tm1 = table1.getColumnModel().getColumn(i);
                     TableColumn tm2 = table2.getColumnModel().getColumn(i);
                     tm1.setCellRenderer(new cellRenderer());
                     tm2.setCellRenderer(new cellRenderer());
               }
   	pane.add(scroll1);
   	pane.add(scroll2);
   }
 
   class cellRenderer extends DefaultTableCellRenderer
    {
       public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col)
            {
               Component comp = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
               setHorizontalAlignment(SwingConstants.CENTER);
               int [] selectedRows = table.getSelectedRows();
               if (selectedRows != null)
	   for(int i=0; i < selectedRows.length; i++)
		   if (selectedRows[i] == row )
		   {
	                       isSelected = true;
	                       break;
	                   }
               if(isSelected)
               {
                   comp.setBackground(Color.BLACK);
	   comp.setForeground(Color.WHITE);
	   comp.repaint();
               }
               return comp;
        }
        
    }
   
 
   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         @Override
         public void run() {
            new JTables().setVisible(true);
         }
      });
   }
}
  

any help please !!!

[Rob Spoor]

Add ListSelectionListeners to the JTables through the object returned by getSelectionModel(). When a row is selected in one table you are then notified, and you can clear the selection in the second, and vice versa.

[Ahmed Aziz]

Thank you Rop Prime

i try with this code but still not what i need

    
import java.awt.*;
import javax.swing.table.*;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
 
 class JTables extends JFrame {
 JList list;
 JTable table1;
 JTable table2;
 JScrollPane scroll2;
 JScrollPane scroll1;
 ListSelectionModel listSelectionModel;
 ListSelectionModel listSelectionModel1;
 JTextArea output;
   public JTables() 
   {
   	setBounds(0,0,500,500);
   	JPanel pane = new JPanel();
   	pane.setLayout(null);
   	setContentPane(pane);
   	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   	pane.setBounds(0,0,500,500);
   	String [] cols = {"Col1","Col2","Col3"};
   	Object [][] rows = {{"data1","data2","data3"}};
   	
	output = new JTextArea(1, 10);
   	table1 = new JTable(rows,cols);
   	table2 = new JTable(rows,cols);
	listSelectionModel = table1.getSelectionModel();
	listSelectionModel.addListSelectionListener(new SharedListSelectionHandler());
    table1.setSelectionModel(listSelectionModel);
	listSelectionModel1 = table2.getSelectionModel();
	listSelectionModel1.addListSelectionListener(new SharedListSelectionHandler());
    table2.setSelectionModel(listSelectionModel1);

    
   	scroll1 = new JScrollPane(table1);
   	scroll2 = new JScrollPane(table2);
   	scroll1.setBounds(10,10,300,50);
   	scroll2.setBounds(10,100,300,50);
	output.setBounds(10,200,400,50);
	
   	table1.setColumnSelectionAllowed(true);
	table1.setRowSelectionAllowed(true);
	table2.setColumnSelectionAllowed(true);
	table2.setRowSelectionAllowed(true);
                for(int i=0;i<3;i++)
               {
                     TableColumn tm1 = table1.getColumnModel().getColumn(i);
                     TableColumn tm2 = table2.getColumnModel().getColumn(i);
                     tm1.setCellRenderer(new cellRenderer());
                     tm2.setCellRenderer(new cellRenderer());
               }
   	pane.add(scroll1);
   	pane.add(scroll2);
   	pane.add(output);
   }
 
   class cellRenderer extends DefaultTableCellRenderer
    {
       public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col)
            {
               Component comp = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
               setHorizontalAlignment(SwingConstants.CENTER);
               int [] selectedRows = table.getSelectedRows();
               if (selectedRows != null)
	   for(int i=0; i < selectedRows.length; i++)
		   if (selectedRows[i] == row )
		   {
	                       isSelected = true;
	                       break;
	                   }
               if(isSelected)
               {
                   comp.setBackground(Color.BLACK);
	   comp.setForeground(Color.WHITE);
	   comp.repaint();
               }
               return comp;
        }

    }
   class cellRenderer1 extends DefaultTableCellRenderer
    {
       public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col)
            {
               Component comp = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
               setHorizontalAlignment(SwingConstants.CENTER);
               int [] selectedRows = table.getSelectedRows();
               if (selectedRows != null)
	   for(int i=0; i < selectedRows.length; i++)
		   if (selectedRows[i] == row )
		   {
	                       isSelected = true;
	                       break;
	                   }
               if(isSelected)
               {
                   comp.setBackground(Color.WHITE);
                   comp.setForeground(Color.BLACK);
                   comp.repaint();
               }
               return comp;
        }

    }
 
   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         @Override
         public void run() {
            new JTables().setVisible(true);
         }
      });
   }
     class SharedListSelectionHandler implements ListSelectionListener {
    public void valueChanged(ListSelectionEvent e) {
      ListSelectionModel lsm = (ListSelectionModel) e.getSource();
      if(lsm.equals(listSelectionModel))
      {
          output.setText("t1");
          listSelectionModel1.clearSelection();
      }
      else
      {
          listSelectionModel.clearSelection();
      }
    }
     }
  }

[Ahmed Aziz]

any help please?

[Rob Spoor]

I've done a bit of investigation, and the problem is that clearing the selection also triggers an event. So when you select something in the second table the following events are triggered:
1) selection of data in table 2, with getValueIsAdjusting() returning true
2) de-selection of data in table 1, with getValueIsAdjusting() returning false; this event is caused by the previous one
3) de-selection of data in table 2, with getValueIsAdjusting() returning true; this event is caused by the previous one
4) selection of data in table 2, with getValueIsAdjusting() returning false; this event matches the first event

The problem here is that event 2 triggers another event, clearing the selection of table 2. You will need to block this event somehow. I usually use a simple boolean for this. In a short hack based on your code (stripped from the renderers):

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

class JTables extends JFrame
{
    JList list;
    JTable table1;
    JTable table2;
    JScrollPane scroll2;
    JScrollPane scroll1;
    ListSelectionModel listSelectionModel;
    ListSelectionModel listSelectionModel1;
    JTextArea output;

    // the boolean
    boolean blockEvents = false;

    public JTables()
    {
        setBounds(0, 0, 500, 500);
        JPanel pane = new JPanel();
        pane.setLayout(null);
        setContentPane(pane);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pane.setBounds(0, 0, 500, 500);
        String[] cols = {"Col1", "Col2", "Col3"};
        Object[][] rows = {{"data1", "data2", "data3"}};

        output = new JTextArea(1, 10);
        table1 = new JTable(rows, cols);
        table2 = new JTable(rows, cols);
        listSelectionModel = table1.getSelectionModel();
        listSelectionModel.addListSelectionListener(new SharedListSelectionHandler());
        table1.setSelectionModel(listSelectionModel);
        listSelectionModel1 = table2.getSelectionModel();
        listSelectionModel1.addListSelectionListener(new SharedListSelectionHandler());
        table2.setSelectionModel(listSelectionModel1);

        scroll1 = new JScrollPane(table1);
        scroll2 = new JScrollPane(table2);
        scroll1.setBounds(10, 10, 300, 50);
        scroll2.setBounds(10, 100, 300, 50);
        output.setBounds(10, 200, 400, 50);

        table1.setColumnSelectionAllowed(true);
        table1.setRowSelectionAllowed(true);
        table2.setColumnSelectionAllowed(true);
        table2.setRowSelectionAllowed(true);
        pane.add(scroll1);
        pane.add(scroll2);
        pane.add(output);
    }

    public static void main(String[] args)
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                new JTables().setVisible(true);
            }
        });
    }

    class SharedListSelectionHandler implements ListSelectionListener
    {
        public void valueChanged(ListSelectionEvent e)
        {
            if (blockEvents)
            {
                // already handling a previous event
                return;
            }
            blockEvents = true;
            ListSelectionModel lsm = (ListSelectionModel) e.getSource();
            if (lsm.equals(listSelectionModel))
            {
                output.setText("t1");
                listSelectionModel1.clearSelection();
            }
            else
            {
                listSelectionModel.clearSelection();
            }
            blockEvents = false;
        }
    }
}

[Ahmed Aziz]

Thank you very much Rob

you solved my problem

Thanks

best wishes