package visualization;

import java.awt.Graphics;

import javax.swing.JPanel;
import javax.swing.JScrollPane;

/**
 * This class enables the user to add a legend area for describing the elements and symbols of an algorithm's visualization.
 * Override method initialize(Graphics) for drawing your legend area's graphical output.
 * @see javax.swing.JPanel
 * @see visualization.HybridWindow
 * @author Fabian Hamm
 * DHBW Stuttgart Campus Horb
 */
public abstract class LegendArea extends JPanel {

	/** The legend area's scroll pane. */
	protected JScrollPane scrollPane;
	
	/**
	 * Standard constructor
	 * Creates an empty legend area with scroll pane.
	 */
	public LegendArea() {
		scrollPane=new JScrollPane(this);
	}

	/**
	 * Returns the legend area's scroll pane.
	 * @return the LegendArea's scroll pane
	*/
	public JScrollPane getScrollPane(){
		return scrollPane;
	}	
		
	/**
	 * Paints the legend area background and calls initialize(Graphics).
	*/
	public void paint(Graphics g) {
		super.paint(g);
		initialize(g);
	}
	
	/**
	 * Method that is responsible for drawing all elements and descriptions of the LegendArea.
	 * Implement this method to add and draw parameters to your legend area.
	 * 
	 * @param g	the Graphics object of the corresponding panel
	 */
	public abstract void initialize(Graphics g);
	
}