PassiveTextField.java Source code

Introduction

Here is the source code for PassiveTextField.java

Source

/*
Core SWING Advanced Programming 
By Kim Topley
ISBN: 0 13 083292 8       
Publisher: Prentice Hall  
*/

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.text.Document;

public class PassiveTextField extends JTextField {
    public PassiveTextField() {
        this(null, null, 0);
    }

    public PassiveTextField(String text) {
        this(null, text, 0);
    }

    public PassiveTextField(int columns) {
        this(null, null, columns);
    }

    public PassiveTextField(String text, int columns) {
        this(null, text, columns);
    }

    public PassiveTextField(Document doc, String text, int columns) {
        super(doc, text, columns);
    }

    public void processComponentKeyEvent(KeyEvent evt) {
        switch (evt.getID()) {
        case KeyEvent.KEY_PRESSED:
        case KeyEvent.KEY_RELEASED:
            if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
                return;
            }
            break;

        case KeyEvent.KEY_TYPED:
            if (evt.getKeyChar() == '\r') {
                return;
            }
            break;
        }

        super.processComponentKeyEvent(evt);
    }

    // Test method
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
        } catch (Exception evt) {
        }

        JFrame f = new JFrame("Passive Text Field");
        f.getContentPane().setLayout(new BoxLayout(f.getContentPane(), BoxLayout.Y_AXIS));
        final PassiveTextField ptf = new PassiveTextField(32);
        JTextField tf = new JTextField(32);
        JPanel p = new JPanel();
        JButton b = new JButton("OK");
        p.add(b);
        f.getContentPane().add(ptf);
        f.getContentPane().add(tf);
        f.getContentPane().add(p);

        ActionListener l = new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                System.out.println("Action event from a text field");
            }
        };
        ptf.addActionListener(l);
        tf.addActionListener(l);

        // Make the button the default button
        f.getRootPane().setDefaultButton(b);
        b.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                System.out.println("Content of text field: <" + ptf.getText() + ">");
            }
        });
        f.pack();
        f.setVisible(true);
    }
}