/**
 * 
 */
package visualization;

import java.awt.Color;
import java.awt.Graphics;

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

import logging.LogElement;
import logging.LogElementList;

/**
 * This class provides the basic draw area for a HybridWindow. 
 * Use it in assoziation with packages logging and visualization. 
 * Just overwrite the draw(Graphics) method to get a graphic output from a log list element. 
 * Parameters for algorithm processing are read from member parameterArea that ist part of the user interface. 
 * @see LogElement
 * @see LogElementList
 * @see visualization.HybridWindow
 * @see javax.swing.JPanel
 * @author Björn Strobel<br><small>
 * University of Cooperative Education Stuttgart, 
 * Campus Horb<br>
 * Department of Information Technology<br>
 * it2003<br></small>
 */
public abstract class DrawArea<LOG extends LogElement>extends JPanel{
	
	/** The draw area's scroll pane. */
	protected JScrollPane scrollPane;
	/** The log element list where the draw area gets the log elements to draw. */
	protected LogElementList<LOG>logList;
	/** The name to be displayed on the draw area's tab in the hybrid window. */
	protected String drawAreaName;
	
	/**
	 * Standard constructor. 
	 * Creates an empty draw area with scroll pane.
	 */
	public DrawArea() {
		super();
		
		scrollPane=new JScrollPane(this);
		
		setBackground(new Color(194,177,255));
        setForeground(new Color(0,0,0));
	}
	
	/**
	 * Creates an empty draw area with scroll pane and sets the specified log list and tab name.
	 * @param logList the draw area's log list
	 * @param drawAreaName the name for the draw area to be displayed on the hybrid window's tab
	 */
	public DrawArea(LogElementList<LOG>logList,String drawAreaName){
		super();
		
		scrollPane=new JScrollPane(this);
		
		setBackground(new Color(194,177,255));
        setForeground(new Color(0,0,0));
        
        this.logList=logList;	
        this.drawAreaName=drawAreaName;
	}
	
	/**
	 * Returns the draw area'a scroll pane.
	 * @return the draw area'a scroll pane
	 */
	public JScrollPane getScrollPane(){
		return scrollPane;
	}
	
	/**
	 * Sets the draw area's log list.
	 * @param logList the draw area's log list
	 */
	public void setLogList(LogElementList<LOG>logList){
		this.logList=logList;
	}
	
	/**
	 * Gets the draw area's name
	 * @return the name to be returned
	 */
	public String getDrawAreaName() {
		return drawAreaName;
	}

	/**
	 * Sets the draw area's name
	 * @param drawAreaName the name to be set
	 */
	public void setDrawAreaName(String drawAreaName) {
		this.drawAreaName = drawAreaName;
	}

	/**
	 * Calls repaint().
	 */
	public void drawStep(){
		repaint();
	}
	
	/**
	 * Paints the draw area background and calls draw(Graphics).
	 */
	public void paint(Graphics g){
		super.paint(g);
		if(logList.isInitialized()){
			draw(g);
		}
	}
	
	/**
	 * Draws the actual log element's graphical output.
	 * @param g Graphics object given by paint(Graphics);
	 */
	public void draw(Graphics g){
		LogElement logElement=(LogElement)logList.get();
		g.drawString(logElement.getDescription(),20,20);
	}
	
	/**
	 * Provided for convenience. Does the same as drawStep.
	 * Use it with logElementList.clear().
	 */
	public void clear(){
		repaint();
	}
}