polygonobj.java

基于jxta的局域网P2P文件共享,可以实现局域网中的文件p2p共享,实现文件快速传输及交流

package connex.plugins.whiteboard;

import java.awt.*;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class PolygonObj
    extends ShapeObj {


  private Polygon poly = new Polygon();


  public PolygonObj() {
    this.id = this.hashCode() + "";
  }

  /**
   * SelectGraphic
   *
   * @param pt Point
   * @return boolean
   * @todo Implement this connex.plugins.whiteboard.ShapeObj method
   */
  public boolean SelectShape(Point pt) {
    int n = poly.npoints;
    for (int i = 0; i < n; i++) {
      if (Math.abs(pt.x - poly.xpoints[i]) < 5 && Math.abs(pt.y - poly.ypoints[i]) < 5) {

        select = i + 1;
        return true;

      }

    }
    if (poly.contains(pt)) {
      select = 1000;
      return true;
    }
    return false;
  }

  /**
   * move
   *
   * @param pt Point
   * @param pt2 Point
   * @todo Implement this connex.plugins.whiteboard.ShapeObj method
   */
  public void move(Point pt, Point pt2) {
    int tmpx = pt.x - pt2.x;
    int tmpy = pt.y - pt2.y;
    if (select <= poly.npoints) {
      drawSelection(true);
      poly.xpoints[select - 1] = pt.x;
      poly.ypoints[select - 1] = pt.y;
      poly.invalidate();
      drawSelection(false);
    }
    else {
      drawSelection(true);
      poly.translate(tmpx, tmpy);
      drawSelection(false);
    }

  }

  protected void drawSelection(boolean xor) {
    BasicStroke stroke = new BasicStroke(1.0f);
    float dash1[] = {
        2.0f};
    BasicStroke dashed = new BasicStroke(1.0f,
                                         BasicStroke.CAP_BUTT,
                                         BasicStroke.JOIN_MITER,
                                         10.0f, dash1, 0.0f);
    int n = poly.npoints;
    g2D.setStroke(dashed);

    g2D.setColor(Color.MAGENTA);
    if (xor) {
      g2D.setXORMode(Color.white);
    }
    g2D.draw(poly);
    for (int i = 0; i < n; i++) {

      g2D.fillRect(poly.xpoints[i] - 2, poly.ypoints[i] - 2, 5, 5);

    }

  }



  /**
   * draw
   *
   * @todo Implement this connex.plugins.whiteboard.ShapeObj method
   */
  public void draw() {
   g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    if (select != 0) {
      drawSelection(false);
    }
    else {
      g2D.setColor(drawColor);

      g2D.draw(poly);
    }
    if (fillColor != null) {
      fill(fillColor);
    }
  }

  /**
   * draw
   *
   * @param start Point
   * @param end Point
   * @todo Implement this connex.plugins.whiteboard.ShapeObj method
   */
  public void draw(Point start, Point end) {
    if (poly.npoints <= 1000) {
      poly.addPoint(start.x, start.y);

      draw();

    }

  }

  /**
   * fill
   *
   * @param fillColor Color
   * @todo Implement this connex.plugins.whiteboard.ShapeObj method
   */
  public void fill(Color fillColor) {
    this.fillColor = fillColor;
    g2D.setColor(fillColor);
    g2D.fill(poly);
  }



}