Mega Code Archive
This program demonstrates the tabbed pane component organizer
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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.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JToggleButton;
import javax.swing.SwingConstants;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/**
* This program demonstrates the tabbed pane component organizer.
* @version 1.03 2007-08-01
* @author Cay Horstmann
*/
public class TabbedPaneTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
JFrame frame = new TabbedPaneFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
/**
* This frame shows a tabbed pane and radio buttons to switch between wrapped and scrolling tab
* layout.
*/
class TabbedPaneFrame extends JFrame
{
public TabbedPaneFrame()
{
setTitle("TabbedPaneTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
tabbedPane = new JTabbedPane();
// we set the components to null and delay their loading until the tab is shown
// for the first time
ImageIcon icon = new ImageIcon("yellow-ball.gif");
tabbedPane.addTab("Mercury", icon, null);
tabbedPane.addTab("Venus", icon, null);
tabbedPane.addTab("Earth", icon, null);
tabbedPane.addTab("Mars", icon, null);
tabbedPane.addTab("Jupiter", icon, null);
tabbedPane.addTab("Saturn", icon, null);
tabbedPane.addTab("Uranus", icon, null);
tabbedPane.addTab("Neptune", icon, null);
tabbedPane.addTab("Pluto", null, null);
final int plutoIndex = tabbedPane.indexOfTab("Pluto");
JPanel plutoPanel = new JPanel();
plutoPanel.add(new JLabel("Pluto", icon, SwingConstants.LEADING));
JToggleButton plutoCheckBox = new JCheckBox();
plutoCheckBox.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
tabbedPane.remove(plutoIndex);
}
});
plutoPanel.add(plutoCheckBox);
tabbedPane.setTabComponentAt(plutoIndex, plutoPanel);
add(tabbedPane, "Center");
tabbedPane.addChangeListener(new ChangeListener()
{
public void stateChanged(ChangeEvent event)
{
// check if this tab still has a null component
if (tabbedPane.getSelectedComponent() == null)
{
// set the component to the image icon
int n = tabbedPane.getSelectedIndex();
loadTab(n);
}
}
});
loadTab(0);
JPanel buttonPanel = new JPanel();
ButtonGroup buttonGroup = new ButtonGroup();
JRadioButton wrapButton = new JRadioButton("Wrap tabs");
wrapButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
tabbedPane.setTabLayoutPolicy(JTabbedPane.WRAP_TAB_LAYOUT);
}
});
buttonPanel.add(wrapButton);
buttonGroup.add(wrapButton);
wrapButton.setSelected(true);
JRadioButton scrollButton = new JRadioButton("Scroll tabs");
scrollButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
}
});
buttonPanel.add(scrollButton);
buttonGroup.add(scrollButton);
add(buttonPanel, BorderLayout.SOUTH);
}
/**
* Loads the tab with the given index.
* @param n the index of the tab to load
*/
private void loadTab(int n)
{
String title = tabbedPane.getTitleAt(n);
ImageIcon planetIcon = new ImageIcon(title + ".gif");
tabbedPane.setComponentAt(n, new JLabel(planetIcon));
// indicate that this tab has been visited--just for fun
tabbedPane.setIconAt(n, new ImageIcon("red-ball.gif"));
}
private JTabbedPane tabbedPane;
private static final int DEFAULT_WIDTH = 400;
private static final int DEFAULT_HEIGHT = 300;
}
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