package project1;

import com.sun.java.swing.plaf.gtk.GTKLookAndFeel;

import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.plaf.metal.MetalLookAndFeel;

public class GTKIcon
{
  public static void main(String[] args)
    throws ClassNotFoundException, InstantiationException,
IllegalAccessException, UnsupportedLookAndFeelException
  {
    // This works
    UIManager.setLookAndFeel(new MetalLookAndFeel());
    System.out.println(UIManager.getLookAndFeel());

    JFrame f = new JFrame("Metal L&F");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(200,200);
    f.setLocation(100, 100);
    f.add(new IconPanel());
    f.setVisible(true);

    // This doesn't work on Linux
    UIManager.setLookAndFeel(new GTKLookAndFeel());
    System.out.println(UIManager.getLookAndFeel());
    
    f = new JFrame("GTK L&F");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(200,200);
    f.setLocation(500, 100);
    f.add(new IconPanel());
    f.setVisible(true);
  }

  private static class IconPanel extends JComponent
  {
    @Override
    protected void paintComponent(Graphics g)
    {
      Icon icon = UIManager.getIcon("Tree.expandedIcon"); //also collapsedIcon
      icon.paintIcon(this, g, 0, 0);
    }
  }
}