ActionChangedListener.java Source code

Introduction

Here is the source code for ActionChangedListener.java

Source

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;

class ActionChangedListener implements PropertyChangeListener {

    private JButton button;

    public ActionChangedListener(JButton button) {
        this.button = button;
    }

    public void propertyChange(PropertyChangeEvent e) {
        String propertyName = e.getPropertyName();
        System.out.println(propertyName);
        if (e.getPropertyName().equals(Action.NAME)) {
            String text = (String) e.getNewValue();
            button.setText(text);
            button.repaint();
        } else if (propertyName.equals("enabled")) {
            Boolean enabledState = (Boolean) e.getNewValue();
            button.setEnabled(enabledState.booleanValue());
            button.repaint();
        } else if (e.getPropertyName().equals(Action.SMALL_ICON)) {
            Icon icon = (Icon) e.getNewValue();
            button.setIcon(icon);
            button.invalidate();
            button.repaint();
        }
    }
}

public class PropertyListenerJComponent {

    public static void main(String[] a) {

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JButton bn = new JButton();

        bn.addPropertyChangeListener(new ActionChangedListener(bn));

        frame.add(bn);
        bn.setEnabled(false);

        frame.setSize(300, 300);
        frame.setVisible(true);

        frame.add(bn);
    }

}