Main.java Source code

Introduction

Here is the source code for Main.java

Source

//Code revised from 
//http://stackoverflow.com/questions/9555281/using-an-animated-gif-in-a-jcombobox
import java.awt.Image;
import java.awt.image.ImageObserver;
import java.net.URL;

import javax.swing.DefaultComboBoxModel;
import javax.swing.ImageIcon;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.plaf.basic.BasicComboPopup;

public class Main {

    public static void main(String[] args) {
        JComboBox<Object> combo = new JComboBox<>();
        URL url = new Main().getClass().getResource("animated.gif");
        combo.setModel(new DefaultComboBoxModel(new Object[] { makeImageIcon(url, combo, 0) }));

        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(combo);
        f.setSize(320, 240);
        f.setVisible(true);
    }

    static ImageIcon makeImageIcon(URL url, JComboBox combo, int row) {
        ImageIcon icon = new ImageIcon(url);
        icon.setImageObserver(new ImageObserver() {
            public boolean imageUpdate(Image img, int infoflags, int x, int y, int w, int h) {
                if (combo.isShowing() && (infoflags & (FRAMEBITS | ALLBITS)) != 0) {
                    if (combo.getSelectedIndex() == row) {
                        combo.repaint();
                    }
                    BasicComboPopup p = (BasicComboPopup) combo.getAccessibleContext().getAccessibleChild(0);
                    JList list = p.getList();
                    if (list.isShowing()) {
                        list.repaint(list.getCellBounds(row, row));
                    }
                }
                return (infoflags & (ALLBITS | ABORT)) == 0;
            };
        });
        return icon;
    }
}