// AddPoly.java
// Command to add a polygon to the drawing.

// Written by Scot Drysdale to
// use for VoronoiTool

import java.awt.Point;

public class AddPoly extends Command {
	private Segment currentSeg;        // Current segment being constructed
	private PointShape pOrig = null;	// starting point for polygon
	  
	// When the mouse is clicked the first time, record the original point.
	// Each successive click create a new segment until get back to original
	// point.
	public void executeClick(Point p, Drawing dwg)
	{
		if(pOrig == null)		// Starting a polygon?
		{
			pOrig = new PointShape(p);
			currentSeg = new Segment(p, p);
			dwg.setTempShape(currentSeg);
		}
		else if(pOrig.euclideanSq(p) <= 9)  // Close the polygon?
		{
			currentSeg.setEndpoint2(pOrig.getPoint());
			dwg.add(currentSeg);
			pOrig = null;		// Must start a new polygon
			dwg.setTempShape(null);
			currentSeg = null;
		}
		else
		{	// End this segment and start a new one
			currentSeg.setEndpoint2(p);
			dwg.add(currentSeg);
			currentSeg = new Segment(p, p);
			dwg.setTempShape(currentSeg);
		}
	}
	
	// Update the segment currently being added
	public void executeMove(Point p, Drawing dwg)
	{
		if(currentSeg != null)
			currentSeg.setEndpoint2(p);
	}
}