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FreeHEP Enhanced Metafile Format Driver

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// Copyright 2002, FreeHEP.
package org.freehep.graphicsio.emf.gdi;

import java.awt.Point;
import java.awt.Rectangle;
import java.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;

/**
 * PolylineTo TAG.
 * 
 * @author Mark Donszelmann
 * @version $Id: freehep-graphicsio-emf/src/main/java/org/freehep/graphicsio/emf/gdi/PolylineTo.java c0f15e7696d3 2007/01/22 19:26:48 duns $
 */
public class PolylineTo extends AbstractPolygon {

    public PolylineTo() {
        super(6, 1, null, 0, null);
    }

    public PolylineTo(Rectangle bounds, int numberOfPoints, Point[] points) {
        this(6, 1, bounds, numberOfPoints, points);
    }

    protected PolylineTo (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 PolylineTo(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();
        GeneralPath currentFigure = renderer.getFigure();

        if (points != null) {
            for (int point = 0; point < numberOfPoints; point ++) {
                // add a point to gp
                currentFigure.lineTo(
                    (float) points[point].getX(),
                    (float) points[point].getY());
            }
        }
    }
}