package swingExamples;

import java.awt.BorderLayout;
import java.awt.Color;

import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class JListColorSelector1 extends JFrame
{
  public JListColorSelector1()
  {
    setTitle("JListColorSelector1");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setSize(400, 300);
    getContentPane().add( new JListPanel() );
  }
  
  private static Color[] COLORS =
  {
    Color.BLACK, Color.BLUE, 
    Color.CYAN, Color.DARK_GRAY,
    Color.GRAY, Color.GREEN, 
    Color.LIGHT_GRAY, Color.MAGENTA,
    Color.ORANGE, Color.PINK, 
    Color.RED, Color.WHITE, 
    Color.YELLOW
  };
  
  //// Inner classes ////
  class JListPanel extends JPanel 
      implements ListSelectionListener
  {
    JListPanel()
    {
      setLayout( new BorderLayout() );
      
      JPanel listPanel = new JPanel();
      m_list.setSelectedIndex(0);
      m_list.addListSelectionListener(this);
      listPanel.add( new JScrollPane(m_list) );
      add(listPanel, BorderLayout.WEST);
      
      add(m_colorPanel, BorderLayout.CENTER);
      Color color = (Color) m_list.getSelectedValue();
      m_colorPanel.setBackground(color);
    }
    
    public void valueChanged(ListSelectionEvent e)
    {
      JList source = (JList) e.getSource();
      Color color = (Color) source.getSelectedValue();
      m_colorPanel.setBackground(color);
      m_colorPanel.repaint();
    }
    
    private JList  m_list = new JList(COLORS);
    private JPanel m_colorPanel = new JPanel();
  }

  /**
   * Main entry point for program
   */
  public static void main(String[] args)
  {
    JListColorSelector1 frame = 
        new JListColorSelector1();
    frame.setVisible(true);
  }
}