Layout Manger for 1 or 2 tables

[Sean Casey]

Hi,

I have a dialog that will contain 1 or 2 tables. In the case that there are 2 tables, I need them both to be viewable in the dialog. In the case of 1 table, I only want to see 1 table. I've been using setVisible on the table panels to make them appear and disappear. The problem with this is that when they're is only 1 table present, where the other table is all gray. Is there a way to alter this, so I see only the 1 table and not all the blank gray space and the table?

Thanks for any help. I'm currently using a gridlayout for this, but it's not really what I'm looking for.

[Michael Dunn]

try setting the layout to BorderLayout()
add table1 to BorderLayout.CENTER
add table2 to BorderLayout.EAST (or wherever)

if only table1 is showing, it should occupy all the space
if both are showing, table1 will get whatever space is left over from table2's
preferredSize, so you may have to tweak table1's preferredSize to match that of
table2, if you want both tables to appear the same size

something like this

    
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
 
class Testing
{
  public void buildGUI()
  {
    JTable table1 = new JTable(10,10);
    JTable table2 = new JTable(5,5);
    JScrollPane sp1 = new JScrollPane(table1);
    final JScrollPane sp2 = new JScrollPane(table2);
    JButton btn = new JButton("Toggle table2");
    final JFrame f = new JFrame();
    f.getContentPane().add(sp1,BorderLayout.CENTER);
    f.getContentPane().add(sp2,BorderLayout.EAST);
    f.getContentPane().add(btn,BorderLayout.SOUTH);
    f.pack();
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
    btn.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        sp2.setVisible(!sp2.isVisible());
        f.validate();
        f.repaint();
      }
    });
  }
  public static void main(String[] args)
  {
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        new Testing().buildGUI();
      }
    });
  }
}

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.AbstractTableModel;
 
public class FluidTables implements ActionListener {
    JScrollPane left;
    JScrollPane right;
    JPanel tablePanel;
 
    public void actionPerformed(ActionEvent e) {
        JToggleButton tb = (JToggleButton)e.getSource();
        String ac = tb.getActionCommand();
        if(ac.equals("left"))
            left.setVisible(tb.isSelected());
        if(ac.equals("right"))
            right.setVisible(tb.isSelected());
        tablePanel.revalidate();
    }
 
    private JPanel getCenter() {
        left  = new JScrollPane(new JTable(getModel(4,3)));
        right = new JScrollPane(new JTable(getModel(10,3)));
        tablePanel = new JPanel(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        gbc.fill = GridBagConstraints.BOTH;
        tablePanel.add(left, gbc);
        tablePanel.add(right, gbc);
        return tablePanel;
    }
 
    private JPanel getLast() {
        JToggleButton showLeft = new JToggleButton("left", true);
        JToggleButton showRight = new JToggleButton("right", true);
        showLeft.addActionListener(this);
        showRight.addActionListener(this);
        JPanel panel = new JPanel();
        panel.add(showLeft);
        panel.add(showRight);
        return panel;
    }
 
    public static void main(String[] args) {
        FluidTables test = new FluidTables();
        JDialog dialog = new JDialog(new Frame(), false);
        dialog.getContentPane().add(test.getCenter());
        dialog.getContentPane().add(test.getLast(), "Last");
        dialog.setSize(400,300);
        dialog.setLocation(200,200);
        dialog.setVisible(true);
    }
 
    private AbstractTableModel getModel(final int rows, final int cols) {
        return new AbstractTableModel() {
            public int getColumnCount() { return cols; }
            public int getRowCount() { return rows;}
            public Object getValueAt(int row, int col) {
                return String.valueOf(row + 1) + (col + 1);
            }
        };
    }
}

[Sean Casey]

Thanks for the help guys.