Mega Code Archive
This program demonstrates cell rendering and editing in a table
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/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.EventObject;
import javax.swing.AbstractCellEditor;
import javax.swing.DefaultCellEditor;
import javax.swing.ImageIcon;
import javax.swing.JColorChooser;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
/**
* This program demonstrates cell rendering and editing in a table.
* @version 1.02 2007-08-01
* @author Cay Horstmann
*/
public class TableCellRenderTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
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 JColorChooser colorChooser;
private JDialog colorDialog;
private JPanel panel;
}
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