package awt;

import java.awt.*;

public class BevelBox extends Container {
	private String title;

	public BevelBox() {
		this(null,null);
	}

	public BevelBox(String t) {
		this (t,null);
	}

	public BevelBox(Component comp) {
		this(null,comp);
	}

	public BevelBox(String t,Component comp) {
		title = t;
		setLayout(new BorderLayout());
		BevelBorder border;
		add("North",border = new BevelBorder(BevelBorder.NORTH));
		border.title = t;
		add("South",new BevelBorder(BevelBorder.SOUTH));
		add("East",new BevelBorder(BevelBorder.EAST));
		add("West",new BevelBorder(BevelBorder.WEST));
		if (comp != null) add("Center",comp);
	}

	
 Warning: a BevelBox can have only *one* child. 
	public Component add(Component comp) {
		return add("Center",comp);
	}
}

class BevelBorder extends Component {
	public final static byte NORTH=0;
	public final static byte WEST=1;
	public final static byte EAST=2;
	public final static byte SOUTH=3;
	byte kind;
	String title;

	public BevelBorder(byte direction) {
		kind = direction;
	}

	public Dimension getPreferredSize() {
		return getMinimumSize();
	}

	public Dimension getMinimumSize() {
		switch (kind) {
		case NORTH:
			if (title == null) return new Dimension(0,2);
			else {
				// Graphics g = getGraphics();
				// Interesting (cursus java): getGraphics()==null als de component nog niet zichtbaar is
				// maar getFont()!=null
				FontMetrics fm = getFontMetrics(getFont());
				if (fm == null) return new Dimension(0,2);
				else {
					return new Dimension(fm.stringWidth(title)+6,fm.getHeight());
				}
			}
		case SOUTH:
			return new Dimension(0,2);
		case WEST:
		case EAST:
			return new Dimension(2,0);
		default:
			return new Dimension(0,0);
		}
	}

	public void paint(Graphics g) {
		Dimension siz = getSize();
		switch (kind) {
		case NORTH:
			if (title == null) {
				g.setColor(Color.black);
				g.drawLine(1,0,siz.width-1,0);
				g.setColor(Color.white);
				g.drawLine(0,1,siz.width-1,1);			
			} else {
				FontMetrics fm = g.getFontMetrics();
				int titlewidth = fm.stringWidth(title)+2;	
				int ascent = fm.getAscent();			
				g.drawString(title,(siz.width-titlewidth)/2+1,ascent);
				ascent /= 2;	// center bar
				// Left horizontal bar
				g.setColor(Color.black);
				g.drawLine(1,ascent,(siz.width-titlewidth)/2,ascent);
				g.setColor(Color.white);
				g.drawLine(0,ascent+1,(siz.width-titlewidth)/2,ascent+1);
				// Left vertical bar
				g.setColor(Color.white);
				g.drawLine(0,ascent+2,0,siz.height-1);
				g.setColor(Color.black);
				g.drawLine(1,ascent+2,1,siz.height-1);
				// Right horizontal bar
				g.setColor(Color.black);
				g.drawLine(siz.width-1,ascent,(siz.width+titlewidth)/2,ascent);
				g.setColor(Color.white);
				g.drawLine(siz.width-1,ascent+1,(siz.width+titlewidth)/2,ascent+1);
				// Right vertical bar
				g.setColor(Color.white);
				g.drawLine(siz.width-1,ascent+2,siz.width-1,siz.height-1);
				g.setColor(Color.black);
				g.drawLine(siz.width-2,ascent+2,siz.width-2,siz.height-1);
			}
			break;
		case SOUTH:
			g.setColor(Color.white);
			g.drawLine(0,0,siz.width-1,0);
			g.setColor(Color.black);
			g.drawLine(0,1,siz.width-1,1);
			break;
		case WEST:
			g.setColor(Color.white);
			g.drawLine(0,0,0,siz.height-1);
			g.setColor(Color.black);
			g.drawLine(1,0,1,siz.height-1);
			break;
		case EAST:
			g.setColor(Color.black);
			g.drawLine(0,0,0,siz.height-1);
			g.setColor(Color.white);
			g.drawLine(1,0,1,siz.height-1);
			break;
		}
	}
}