SplitPaneDemo2.java

/*
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 * modification, are permitted provided that the following conditions
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 *     notice, this list of conditions and the following disclaimer.
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 *   - Redistributions in binary form must reproduce the above copyright
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 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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package javademo.swing.splitpane;

import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JSplitPane;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class SplitPaneDemo2 extends JFrame implements ListSelectionListener
{
    private static final long serialVersionUID = 1L;
    
    private JLabel label;
    
    public SplitPaneDemo2()
    {
        super("SplitPaneDemo2");
        
        // Create an instance of SplitPaneDemo
        SplitPaneDemo splitPaneDemo = new SplitPaneDemo();
        JSplitPane top = splitPaneDemo.getSplitPane();
        splitPaneDemo.getImageList().addListSelectionListener(this);
        
        // XXXX: Bug #4131528, borders on nested split panes accumulate.
        // Workaround: Set the border on any split pane within
        // another split pane to null. Components within nested split
        // panes need to have their own border for this to work well.
        top.setBorder(null);
        
        // Create a regular old label
        label = new JLabel("Click on an image name in the list.", JLabel.CENTER);
        
        // Create a split pane and put "top" (a split pane)
        // and JLabel instance in it.
        JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, top, label);
        splitPane.setOneTouchExpandable(true);
        splitPane.setDividerLocation(180);
        
        // Provide minimum sizes for the two components in the split pane
        top.setMinimumSize(new Dimension(100, 50));
        label.setMinimumSize(new Dimension(100, 30));
        
        // Add the split pane to this frame
        getContentPane().add(splitPane);
    }
    
    public void valueChanged(ListSelectionEvent e)
    {
        if (e.getValueIsAdjusting())
            return;
        
        JList theList = (JList)e.getSource();
        if (theList.isSelectionEmpty())
        {
            label.setText("Nothing selected.");
        }
        else
        {
            int index = theList.getSelectedIndex();
            label.setText("Selected image number " + index);
        }
    }
    
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI()
    {
        // Create and set up the window.
        JFrame frame = new SplitPaneDemo2();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        // Display the window.
        frame.pack();
        frame.setVisible(true);
    }
    
    public static void main(String[] args)
    {
        // Schedule a job for the event-dispatching thread:
        // creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                createAndShowGUI();
            }
        });
    }
}