DynamicIconExample.java Source code

Introduction

Here is the source code for DynamicIconExample.java

Source

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class DynamicIconExample {
    public static void main(String[] args) {
        final JSlider width = new JSlider(JSlider.HORIZONTAL, 1, 150, 75);
        final JSlider height = new JSlider(JSlider.VERTICAL, 1, 150, 75);

        class DynamicIcon implements Icon {
            public int getIconWidth() {
                return width.getValue();
            }

            public int getIconHeight() {
                return height.getValue();
            }

            public void paintIcon(Component c, Graphics g, int x, int y) {
                g.fill3DRect(x, y, getIconWidth(), getIconHeight(), true);
            }
        }

        Icon icon = new DynamicIcon();
        final JLabel dynamicLabel = new JLabel(icon);

        class Updater implements ChangeListener {
            public void stateChanged(ChangeEvent ev) {
                dynamicLabel.repaint();
            }
        }
        Updater updater = new Updater();

        width.addChangeListener(updater);
        height.addChangeListener(updater);

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

        Container c = f.getContentPane();
        c.setLayout(new BorderLayout());
        c.add(width, BorderLayout.NORTH);
        c.add(height, BorderLayout.WEST);
        c.add(dynamicLabel, BorderLayout.CENTER);
        f.setSize(210, 210);
        f.setVisible(true);
    }

}