// Copyright 2002, FreeHEP.
package org.freehep.graphicsio.emf.gdi;
import com.google.code.appengine.awt.Point;
import com.google.code.appengine.awt.Rectangle;
import com.google.code.appengine.awt.geom.GeneralPath;
import java.io.IOException;
import org.freehep.graphicsio.emf.EMFInputStream;
import org.freehep.graphicsio.emf.EMFTag;
import org.freehep.graphicsio.emf.EMFRenderer;
/**
* Polyline TAG.
*
* @author Mark Donszelmann
* @version $Id: Polyline.java 10367 2007-01-22 19:26:48Z duns $
*/
public class Polyline extends AbstractPolygon {
public Polyline() {
super(4, 1, null, 0, null);
}
public Polyline(Rectangle bounds, int numberOfPoints, Point[] points) {
super(4, 1, bounds, numberOfPoints, points);
}
protected Polyline (int id, int version, Rectangle bounds, int numberOfPoints, Point[] points) {
super(id, version, bounds, numberOfPoints, points);
}
public EMFTag read(int tagID, EMFInputStream emf, int len)
throws IOException {
Rectangle r = emf.readRECTL();
int n = emf.readDWORD();
return new Polyline(r, n, emf.readPOINTL(n));
}
/**
* displays the tag using the renderer
*
* @param renderer EMFRenderer storing the drawing session data
*/
public void render(EMFRenderer renderer) {
Point[] points = getPoints();
int numberOfPoints = getNumberOfPoints();
if (points != null && points.length > 0) {
GeneralPath gp = new GeneralPath(
renderer.getWindingRule());
Point p;
for (int point = 0; point < numberOfPoints; point ++) {
// add a point to gp
p = points[point];
if (point > 0) {
gp.lineTo((float) p.getX(), (float)p.getY());
} else {
gp.moveTo((float) p.getX(), (float)p.getY());
}
}
renderer.drawOrAppend(gp);
}
}
}