React to list selection action : List « Swing JFC « Java

1. Java
2. Swing JFC
3. List

React to list selection action

 
import java.awt.Container;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class FontDialog extends JFrame implements ActionListener,
    ListSelectionListener {
  private JList style = new JList(new String[] { "Serif", "SansSerif",
      "Monospaced", "Dialog", "DialogInput" });

  private JCheckBox bold = new JCheckBox("Bold");

  private JCheckBox italic = new JCheckBox("Italic");

  private JTextField size = new JTextField("10", 2);

  private JTextField sample = new JTextField();

  public FontDialog() {
    setTitle("FontDialog");
    setSize(600, 200);
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });

    Container contentPane = getContentPane();
    GridBagLayout gbl = new GridBagLayout();
    contentPane.setLayout(gbl);

    style.setSelectedIndex(0);

    JLabel label = new JLabel("Size: ");

    sample.setEditable(false);

    getContentPane().add(new JScrollPane(style));
    getContentPane().add(bold);
    getContentPane().add(italic);
    getContentPane().add(label);
    getContentPane().add(size);
    getContentPane().add(sample);
    sample.setText("The quick brown fox");

    bold.addActionListener(this);
    italic.addActionListener(this);
    style.addListSelectionListener(this);
    size.addActionListener(this);
  }

  public void valueChanged(ListSelectionEvent evt) {
    updateFont();
  }

  public void actionPerformed(ActionEvent evt) {
    updateFont();
  }

  public void updateFont() {
    Font font = new Font((String) style.getSelectedValue(), (bold
        .isSelected() ? Font.BOLD : 0)
        + (italic.isSelected() ? Font.ITALIC : 0), Integer
        .parseInt(size.getText()));
    sample.setFont(font);
    repaint();
  }

  public static void main(String[] args) {
    Frame f = new FontDialog();
    f.show();
  }
}
           
         
  

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