// File: FigBentLine.java
// Classes: FigBentLine
// Original Author: Kedar Patankar

package EDU.neu.ccs.demeter.tools.apstudio.graphedit;

import java.awt.Color;
import java.awt.Rectangle;
import java.awt.Point;
import java.awt.Graphics;
import java.util.Hashtable;



/** Class to implement bent lines when drawing the edges. */

public class FigBentLine extends DiagramElement
{
	public static final int FUDGE_FACTOR = 4;
	private Point firstEnd,bendPoint,secondEnd;

	/** Construct a new FigLine with the given coordinates and color. */
	public FigBentLine(int x1,int y1)
	{
		firstEnd = new Point(x1,y1);
		bendPoint=null;
		secondEnd=new Point (x1,y1);
	}

	public void setBendPoint(int x,int y)
	{
		bendPoint = new Point(x,y);
	}
	public Point getBendPoint()
	{
		return bendPoint;
	}

	public void createDrag(int x, int y) 
	{
		secondEnd.x = x;
		secondEnd.y = y;
	}

	/** draw this line object */
	public void draw(Graphics g) 
	{
		g.setColor(Color.black);
		if(bendPoint==null)
			g.drawLine(firstEnd.x, firstEnd.y, secondEnd.x,secondEnd.y);
		else
		{
			g.drawLine(firstEnd.x, firstEnd.y, bendPoint.x,bendPoint.y);
			g.drawLine(bendPoint.x,bendPoint.y, secondEnd.x,secondEnd.y);
		}
	}
  /** Reply a rect that encloses this line. I add a few pixels on
   * either side so that the rect will have non-zero area. */
	public Rectangle getBoundingBox() 
	{
		Point p = secondEnd;
		Point b = bendPoint;
		Point q = firstEnd;

		if(b!=null)
		{
			int x1 = Math.min(p.x,b.x);
			x1=Math.min(x1,q.x);
			int y1 = Math.min(p.y,b.y);
			y1=Math.min(y1,q.y);
			
			int x2 = Math.max(p.x,b.x);
			x2=Math.max(x2,q.x);
			int y2 = Math.max(p.y,b.y);
			y2=Math.max(y2,q.y);

			return new Rectangle(x1 - 1 , y1 -1 , x2 - x1 +2 , y2 - y1 +2);
		}
		else
		{
			 return new Rectangle(Math.min(p.x, q.x) - 1,
								  Math.min(p.y, q.y) - 1,
								  Math.max(p.x, q.x) - Math.min(p.x, q.y) + 2,
								  Math.max(p.y, q.x) - Math.min(p.y, q.y) + 2);
		}
	}
// Following methods are meaningless but required since DiagramElement defines them as abstract methods
	public void drawSelected(Graphics g) {}
	public Selection selectionObject() { return null; }
	public void setGraphicAttribute(String k, Object v) {}

  
} /* end class FigBentLine */