Mega Code Archive
Field with different formats with focus and without
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/*
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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