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/* ScrollBarDemo.java -- An example showing scroll bars in Swing.
Copyright (C) 2005, 2006, Free Software Foundation, Inc.
This file is part of GNU Classpath examples.
GNU Classpath 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 2, or (at your option)
any later version.
GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
package gnu.classpath.examples.swing;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.SwingUtilities;
/**
* A simple scroll bar demo showing various scroll bars in different states.
*/
public class ScrollBarDemo
extends JPanel
implements ActionListener
{
/**
* Creates a new demo instance.
*/
public ScrollBarDemo()
{
super();
createContent();
}
/**
* When the demo is run independently, the frame is displayed, so we should
* initialise the content panel (including the demo content and a close
* button). But when the demo is run as part of the Swing activity board,
* only the demo content panel is used, the frame itself is never displayed,
* so we can avoid this step.
*/
void initFrameContent()
{
JPanel closePanel = new JPanel();
JButton closeButton = new JButton("Close");
closeButton.setActionCommand("CLOSE");
closeButton.addActionListener(this);
closePanel.add(closeButton);
add(closePanel, BorderLayout.SOUTH);
}
/**
* Returns a panel with the demo content. The panel
* uses a BorderLayout(), and the BorderLayout.SOUTH area
* is empty, to allow callers to add controls to the
* bottom of the panel if they want to (a close button is
* added if this demo is being run as a standalone demo).
*/
private void createContent()
{
setLayout(new BorderLayout());
JPanel panel = createScrollBarPanel();
add(panel);
}
private JPanel createScrollBarPanel()
{
JPanel panel = new JPanel(new BorderLayout());
JPanel horizontalPanel = new JPanel();
JScrollBar scroll1a = new JScrollBar(JScrollBar.HORIZONTAL);
JScrollBar scroll1b = new JScrollBar(JScrollBar.HORIZONTAL);
scroll1b.setEnabled(false);
JScrollBar scroll1c = new JScrollBar(JScrollBar.HORIZONTAL);
scroll1c.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE);
JScrollBar scroll1d = new JScrollBar(JScrollBar.HORIZONTAL);
scroll1d.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE);
scroll1d.setEnabled(false);
horizontalPanel.add(scroll1a);
horizontalPanel.add(scroll1b);
horizontalPanel.add(scroll1c);
horizontalPanel.add(scroll1d);
panel.add(horizontalPanel, BorderLayout.NORTH);
JPanel verticalPanel = new JPanel();
verticalPanel.setLayout(new GridLayout(1, 7));
JScrollBar scroll2a = new JScrollBar(JScrollBar.VERTICAL);
JScrollBar scroll2b = new JScrollBar(JScrollBar.VERTICAL);
scroll2b.setEnabled(false);
JScrollBar scroll2c = new JScrollBar(JScrollBar.VERTICAL);
scroll2c.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE);
JScrollBar scroll2d = new JScrollBar(JScrollBar.VERTICAL);
scroll2d.setEnabled(false);
scroll2d.putClientProperty("JScrollBar.isFreeStanding", Boolean.FALSE);
verticalPanel.add(scroll2a);
verticalPanel.add(new JPanel());
verticalPanel.add(scroll2b);
verticalPanel.add(new JPanel());
verticalPanel.add(scroll2c);
verticalPanel.add(new JPanel());
verticalPanel.add(scroll2d);
panel.add(verticalPanel, BorderLayout.EAST);
JPanel centerPanel = new JPanel(new GridLayout(1, 2));
centerPanel.add(new JScrollBar(JScrollBar.HORIZONTAL));
centerPanel.add(new JScrollBar(JScrollBar.VERTICAL));
panel.add(centerPanel);
return panel;
}
public void actionPerformed(ActionEvent e)
{
if (e.getActionCommand().equals("CLOSE"))
{
System.exit(0);
}
}
public static void main(String[] args)
{
SwingUtilities.invokeLater
(new Runnable()
{
public void run()
{
ScrollBarDemo app = new ScrollBarDemo();
app.initFrameContent();
JFrame frame = new JFrame("ScrollBar Demo");
frame.getContentPane().add(app);
frame.pack();
frame.setVisible(true);
}});
}
/**
* Returns a DemoFactory that creates a ScrollBarDemo.
*
* @return a DemoFactory that creates a ScrollBarDemo
*/
public static DemoFactory createDemoFactory()
{
return new DemoFactory()
{
public JComponent createDemo()
{
return new ScrollBarDemo();
}
};
}
}
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