ListSelectionModel and ListSelectionListener : ListSelectionListener « Swing Event « Java Tutorial

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Java Tutorial » Swing Event » ListSelectionListener 
15. 24. 6. ListSelectionModel and ListSelectionListener
/*
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 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
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 *     documentation and/or other materials provided with the distribution.
 *
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 *     contributors may be used to endorse or promote products derived
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */

/*
 * ListSelectionDemo.java requires no other files.
 */

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class ListSelectionDemo extends JPanel {
  JTextArea output;
  JList list;
  JTable table;
  String newline = "\n";
  ListSelectionModel listSelectionModel;

  public ListSelectionDemo() {
    super(new BorderLayout());

    String[] listData = "one""two""three""four""five""six""seven" };
    String[] columnNames = "French""Spanish""Italian" };
    list = new JList(listData);

    listSelectionModel = list.getSelectionModel();
    listSelectionModel
        .addListSelectionListener(new SharedListSelectionHandler());
    JScrollPane listPane = new JScrollPane(list);

    JPanel controlPane = new JPanel();
    String[] modes = "SINGLE_SELECTION""SINGLE_INTERVAL_SELECTION",
        "MULTIPLE_INTERVAL_SELECTION" };

    final JComboBox comboBox = new JComboBox(modes);
    comboBox.setSelectedIndex(2);
    comboBox.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        String newMode = (StringcomboBox.getSelectedItem();
        if (newMode.equals("SINGLE_SELECTION")) {
          listSelectionModel
              .setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        else if (newMode.equals("SINGLE_INTERVAL_SELECTION")) {
          listSelectionModel
              .setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        else {
          listSelectionModel
              .setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        }
        output.append("----------" "Mode: " + newMode + "----------"
            + newline);
      }
    });
    controlPane.add(new JLabel("Selection mode:"));
    controlPane.add(comboBox);

    // Build output area.
    output = new JTextArea(110);
    output.setEditable(false);
    JScrollPane outputPane = new JScrollPane(output,
        ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
        ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);

    // Do the layout.
    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
    add(splitPane, BorderLayout.CENTER);

    JPanel topHalf = new JPanel();
    topHalf.setLayout(new BoxLayout(topHalf, BoxLayout.LINE_AXIS));
    JPanel listContainer = new JPanel(new GridLayout(11));
    listContainer.setBorder(BorderFactory.createTitledBorder("List"));
    listContainer.add(listPane);

    topHalf.setBorder(BorderFactory.createEmptyBorder(5505));
    topHalf.add(listContainer);
    // topHalf.add(tableContainer);

    topHalf.setMinimumSize(new Dimension(10050));
    topHalf.setPreferredSize(new Dimension(100110));
    splitPane.add(topHalf);

    JPanel bottomHalf = new JPanel(new BorderLayout());
    bottomHalf.add(controlPane, BorderLayout.PAGE_START);
    bottomHalf.add(outputPane, BorderLayout.CENTER);
    // XXX: next line needed if bottomHalf is a scroll pane:
    // bottomHalf.setMinimumSize(new Dimension(400, 50));
    bottomHalf.setPreferredSize(new Dimension(450135));
    splitPane.add(bottomHalf);
  }

  /**
   * 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 JFrame("ListSelectionDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    // Create and set up the content pane.
    ListSelectionDemo demo = new ListSelectionDemo();
    demo.setOpaque(true);
    frame.setContentPane(demo);

    // 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();
      }
    });
  }

  class SharedListSelectionHandler implements ListSelectionListener {
    public void valueChanged(ListSelectionEvent e) {
      ListSelectionModel lsm = (ListSelectionModele.getSource();

      int firstIndex = e.getFirstIndex();
      int lastIndex = e.getLastIndex();
      boolean isAdjusting = e.getValueIsAdjusting();
      output.append("Event for indexes " + firstIndex + " - " + lastIndex
          "; isAdjusting is " + isAdjusting + "; selected indexes:");

      if (lsm.isSelectionEmpty()) {
        output.append(" <none>");
      else {
        // Find out which indexes are selected.
        int minIndex = lsm.getMinSelectionIndex();
        int maxIndex = lsm.getMaxSelectionIndex();
        for (int i = minIndex; i <= maxIndex; i++) {
          if (lsm.isSelectedIndex(i)) {
            output.append(" " + i);
          }
        }
      }
      output.append(newline);
      output.setCaretPosition(output.getDocument().getLength());
    }
  }
}
15. 24. ListSelectionListener
15. 24. 1. Listening to JList Events with a ListSelectionListenerListening to JList Events with a ListSelectionListener
15. 24. 2. Shared ListSelectionHandlerShared ListSelectionHandler
15. 24. 3. ListSelectionEvent
15. 24. 4. ListSelectionListener and ListSelectionEvent
15. 24. 5. ListSelectionModel, JTable and ListSelectionListener
15. 24. 6. ListSelectionModel and ListSelectionListener
15. 24. 7. Implement a graphical list selection monitor
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