/**
     * Apply a given function to the current image
     */
    private void applyFunction(Function function)
    {
    	if(currentImage != null) {    	
    		function.apply(currentImage);    //A function is applied
    		frame.repaint();    		
    		showStatus("Applied: " + function.getName());
    	}
    	else {
    		showStatus("No image loaded.");
    	}
    }


------------------------------------------------------------------------

public class Rotate extends Function {
	
	
	
	public Rotate(String name) 
	{
		super(name);
	}
	
	/**
	 * Apply this function to an image
	 */
	public void apply(OFImage image)
	{
		int height = image.getHeight();
		int width = image.getWidth();
		//Rotate the image
		Graphics2D g = (Graphics2D) image.createGraphics();
		g.rotate(Math.PI / 4, width / 2, height / 2);		
		g.drawImage(image, 0,0,null);		
	}


}