// Fig. 11.25: MultipleSelectionFrame.java
// Copying items from one List to another.
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JButton;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;

public class MultipleSelectionFrame extends JFrame 
{
   private JList colorJList; // list to hold color names
   private JList copyJList; // list to copy color names into
   private JButton copyJButton; // button to copy selected names
   private final String colorNames[] = { "Black", "Blue", "Cyan", 
      "Dark Gray", "Gray", "Green", "Light Gray", "Magenta", "Orange", 
      "Pink", "Red", "White", "Yellow" };

   // MultipleSelectionFrame constructor
   public MultipleSelectionFrame()
   {
      super( "Multiple Selection Lists" );
      setLayout( new FlowLayout() ); // set frame layout

      colorJList = new JList( colorNames ); // holds names of all colors
      colorJList.setVisibleRowCount( 5 ); // show five rows
      colorJList.setSelectionMode( 
         ListSelectionModel.MULTIPLE_INTERVAL_SELECTION );
      add( new JScrollPane( colorJList ) ); // add list with scrollpane

      copyJButton = new JButton( "Copy >>>" ); // create copy button
      copyJButton.addActionListener(

         new ActionListener() // anonymous inner class 
         {  
            // handle button event
            public void actionPerformed( ActionEvent event )
            {
               // place selected values in copyJList
               copyJList.setListData( colorJList.getSelectedValues() );
            } // end method actionPerformed
         } // end anonymous inner class
      ); // end call to addActionListener

      add( copyJButton ); // add copy button to JFrame

      copyJList = new JList(); // create list to hold copied color names
      copyJList.setVisibleRowCount( 5 ); // show 5 rows
      copyJList.setFixedCellWidth( 100 ); // set width
      copyJList.setFixedCellHeight( 15 ); // set height
      copyJList.setSelectionMode( 
         ListSelectionModel.SINGLE_INTERVAL_SELECTION );
      add( new JScrollPane( copyJList ) ); // add list with scrollpane
   } // end MultipleSelectionFrame constructor
} // end class MultipleSelectionFrame


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