tablecellrendertest.java

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/**
   @version 1.01 2004-08-22
   @author Cay Horstmann
*/

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

/**
   This program demonstrates cell rendering and editing
   in a table.
*/
public class TableCellRenderTest
{  
   public static void main(String[] args)
   {  
      JFrame frame = new TableCellRenderFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);      
   }
}

/**
   This frame contains a table of planet data.
*/
class TableCellRenderFrame extends JFrame
{  
   public TableCellRenderFrame()
   {  
      setTitle("TableCellRenderTest");
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

      TableModel model = new PlanetTableModel();
      JTable table = new JTable(model);
      table.setRowSelectionAllowed(false);

      // set up renderers and editors

      table.setDefaultRenderer(Color.class, new ColorTableCellRenderer());
      table.setDefaultEditor(Color.class, new ColorTableCellEditor());

      JComboBox moonCombo = new JComboBox();
      for (int i = 0; i <= 20; i++)
         moonCombo.addItem(i);

      TableColumnModel columnModel = table.getColumnModel();
      TableColumn moonColumn = columnModel.getColumn(PlanetTableModel.MOONS_COLUMN);
      moonColumn.setCellEditor(new DefaultCellEditor(moonCombo));
      moonColumn.setHeaderRenderer(table.getDefaultRenderer(ImageIcon.class));
      moonColumn.setHeaderValue(new ImageIcon("Moons.gif"));

      // show table

      table.setRowHeight(100);
      add(new JScrollPane(table), BorderLayout.CENTER);
   }

   private static final int DEFAULT_WIDTH = 600;
   private static final int DEFAULT_HEIGHT = 400;
}

/** 
   The planet table model specifies the values, rendering
   and editing properties for the planet data.
*/
class PlanetTableModel extends AbstractTableModel
{  
   public String getColumnName(int c) { return columnNames[c]; }
   public Class getColumnClass(int c) { return cells[0][c].getClass(); }
   public int getColumnCount() { return cells[0].length; }
   public int getRowCount() { return cells.length; }
   public Object getValueAt(int r, int c) { return cells[r][c]; }
   public void setValueAt(Object obj, int r, int c) { cells[r][c] = obj; }
   public boolean isCellEditable(int r, int c)
   {  
      return c == PLANET_COLUMN || c == MOONS_COLUMN || c == GASEOUS_COLUMN || c == COLOR_COLUMN;
   }

   public static final int PLANET_COLUMN = 0;
   public static final int MOONS_COLUMN = 2;
   public static final int GASEOUS_COLUMN = 3;
   public static final int COLOR_COLUMN = 4;

   private Object[][] cells =
   {  
      { "Mercury", 2440.0,  0, false, Color.yellow, new ImageIcon("Mercury.gif") },    
      { "Venus", 6052.0, 0, false, Color.yellow, new ImageIcon("Venus.gif") },
      { "Earth", 6378.0, 1, false, Color.blue, new ImageIcon("Earth.gif") },
      { "Mars", 3397.0, 2, false, Color.red, new ImageIcon("Mars.gif") },
      { "Jupiter", 71492.0, 16, true, Color.orange, new ImageIcon("Jupiter.gif") },
      { "Saturn", 60268.0, 18, true, Color.orange, new ImageIcon("Saturn.gif") },
      { "Uranus", 25559.0, 17, true, Color.blue, new ImageIcon("Uranus.gif") },
      { "Neptune", 24766.0, 8, true, Color.blue, new ImageIcon("Neptune.gif") },
      { "Pluto", 1137.0, 1, false, Color.black, new ImageIcon("Pluto.gif") }
   };

   private String[] columnNames = { "Planet", "Radius", "Moons", "Gaseous", "Color", "Image" };
}

/**
   This renderer renders a color value as a panel with the
   given color.
*/
class ColorTableCellRenderer extends JPanel implements TableCellRenderer
{  
   public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, 
      boolean hasFocus, int row, int column)
   {  
      setBackground((Color) value);
      if (hasFocus) 
         setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
      else
         setBorder(null);
      return this;
   }
}

/**
   This editor pops up a color dialog to edit a cell value
*/
class ColorTableCellEditor extends AbstractCellEditor implements TableCellEditor
{  
   public ColorTableCellEditor()
   {  
      panel = new JPanel();
      // prepare color dialog

      colorChooser = new JColorChooser();
      colorDialog = JColorChooser.createDialog(null, "Planet Color", false, colorChooser, 
         new 
            ActionListener() // OK button listener
            {  
               public void actionPerformed(ActionEvent event) { stopCellEditing(); }
            },
         new 
            ActionListener() // Cancel button listener
            {  
               public void actionPerformed(ActionEvent event) { cancelCellEditing(); }
            });
      colorDialog.addWindowListener(new
         WindowAdapter()
         {
            public void windowClosing(WindowEvent event) { cancelCellEditing(); }
         });
   }

   public Component getTableCellEditorComponent(JTable table,
      Object value, boolean isSelected, int row, int column)
   {  
      // this is where we get the current Color value. We store it in the dialog in case the user 
      // starts editing
      colorChooser.setColor((Color) value);
      return panel;
   }

   public boolean shouldSelectCell(EventObject anEvent)
   {  
      // start editing
      colorDialog.setVisible(true);

      // tell caller it is ok to select this cell
      return true;
   }

   public void cancelCellEditing()
   {  
      // editing is canceled--hide dialog
      colorDialog.setVisible(false);
      super.cancelCellEditing();
   }

   public boolean stopCellEditing()
   {  
      // editing is complete--hide dialog
      colorDialog.setVisible(false);
      super.stopCellEditing();

      // tell caller is is ok to use color value
      return true;
   }

   public Object getCellEditorValue()
   {  
      return colorChooser.getColor();
   }

   private Color color;
   private JColorChooser colorChooser;
   private JDialog colorDialog;
   private JPanel panel;
}