Field with different formats with focus and without : Formatted TextField « Swing JFC « Java

1. Java
2. Swing JFC
3. Formatted TextField

Field with different formats with focus and without

   
/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly 
*/
// FactoryDemo.java
//Demo 1: field with different formats with focus and without.<br>
//Demo 2: Change the format of a field when the user presses a button.
//

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.ParseException;

import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
import javax.swing.text.DefaultFormatterFactory;
import javax.swing.text.MaskFormatter;

public class FactoryDemo {

  public static JPanel demo1() {
    // Demo 1: field with different formats with focus and without

    JPanel pan = new JPanel(new BorderLayout());
    pan.setBorder(new TitledBorder("Demo 1: format toggles with focus"));

    MaskFormatter withFocus = null, withoutFocus = null;
    try {
      withFocus = new MaskFormatter("LLLL");
      withoutFocus = new MaskFormatter("UUUU");
    } catch (ParseException pe) {
    }

    DefaultFormatterFactory factory = new DefaultFormatterFactory(
        withoutFocus, null, withFocus);

    JFormattedTextField field = new JFormattedTextField(factory);
    field.setValue("Four");
    pan.add(field, BorderLayout.CENTER);

    return pan;
  }

  public static JPanel demo2() {
    // Demo 2: Change the format of a field when the user presses a button.
    // We can't call field.setFormatter() because that's a protected method.
    // (Plus it wouldn't work anyway. The old factory would replace our new
    // formatter with an "old" one next time the field gains or loses
    // focus.)
    // The thing to do is send a new factory to field.setFormatterFactory().

    JPanel pan = new JPanel(new BorderLayout());
    pan.setBorder(new TitledBorder("Demo 2: change format midstream"));

    MaskFormatter lowercase = null;
    try {
      lowercase = new MaskFormatter("LLLL");
    } catch (ParseException pe) {
    }
    final JFormattedTextField field = new JFormattedTextField(lowercase);
    field.setValue("Fore");
    pan.add(field, BorderLayout.CENTER);

    final JButton change = new JButton("change format");
    JPanel changePanel = new JPanel();
    changePanel.add(change);
    pan.add(changePanel, BorderLayout.SOUTH);

    change.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        try {
          field.commitEdit(); // commit current edit (if any)
          MaskFormatter uppercase = new MaskFormatter("UUUU");
          DefaultFormatterFactory factory = new DefaultFormatterFactory(
              uppercase);
          field.setFormatterFactory(factory);
          change.setEnabled(false);
        } catch (ParseException pe) {
        }
      }
    });

    return pan;
  }

  public static void main(String argv[]) {
    JFrame f = new JFrame("FactoryDemo");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(demo1(), BorderLayout.NORTH);
    f.getContentPane().add(demo2(), BorderLayout.SOUTH);
    f.setSize(240, 160);
    f.setVisible(true);
  }
}

           
         
    
    
  

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