示例#1
0
  /**
   * Creates a image of the WFS layer's data
   *
   * @return image
   */
  private BufferedImage draw() {
    MapContent content = new MapContent();
    MapViewport viewport = new MapViewport();

    CoordinateReferenceSystem crs = location.getCrs();
    ReferencedEnvelope bounds = location.getEnvelope();

    Rectangle screenArea;
    if (isTile && bufferSize != 0.0d) {
      double width = (location.getRight() - location.getLeft()) / 2 * bufferSize;
      double height = (location.getTop() - location.getBottom()) / 2 * bufferSize;
      bounds = location.createEnlargedEnvelope(width, height);
      screenArea = new Rectangle(0, 0, bufferedImageWidth, bufferedImageHeight);
    } else {
      screenArea = new Rectangle(0, 0, imageWidth, imageHeight); // image size
    }

    viewport.setCoordinateReferenceSystem(crs);
    viewport.setScreenArea(screenArea);
    viewport.setBounds(bounds);
    viewport.setMatchingAspectRatio(true);

    if (features.size() > 0) {
      Layer featureLayer = new FeatureLayer(features, style);
      content.addLayer(featureLayer);
    }

    content.setViewport(viewport);

    return saveImage(content);
  }
示例#2
0
  @Override
  public void draw(Graphics2D g2d, MapContent map, MapViewport viewport) {
    if (map != null && this.map == null) {
      this.map = map;
    }

    if (viewport == null) {
      viewport = map.getViewport(); // use the map viewport if one has not been provided
    }
    if (viewport == null || viewport.getScreenArea() == null) {
      return; // renderer is not set up for use yet
    }
    if (collection != null && signsdb == null) {
      signsdb = new Hashtable();
      for (Iterator it1 = collection.iterator(); it1.hasNext(); ) {
        SimpleFeature feature = (SimpleFeature) it1.next();
        StructOffset offset = new StructOffset(0, 0, -1);
        signsdb.put(feature, offset);
      }
    }
    // 消除线条锯齿
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    DefaultFeatureCollection collection = this.getCollection();
    // 遍历得到每个SimpleFeature

    for (Iterator it1 = collection.iterator(); it1.hasNext(); ) {
      SimpleFeature feature = (SimpleFeature) it1.next();
      String id = feature.getID();

      DirectPosition2D geoCoords = null;
      DirectPosition2D signCoords = null;

      Point point = (Point) feature.getAttribute("the_geom");
      if (point != null) {
        // 保存前一次刷新所处的位置
        double x = point.getX();
        double y = point.getY();
        geoCoords = new DirectPosition2D(x, y);
      }

      // 经纬度坐标转换为屏幕坐标
      MathTransform transform_math;
      try {
        transform_math =
            CRS.findMathTransform(
                DefaultGeographicCRS.WGS84, viewport.getCoordinateReferenceSystem(), true);
        transform_math.transform(geoCoords, geoCoords);
        AffineTransform transform_affine = viewport.getWorldToScreen();
        transform_affine.transform(geoCoords, geoCoords);

        g2d.setColor(Color.CYAN);
        g2d.drawOval((int) geoCoords.x, (int) geoCoords.y, 10, 10);

        // 如果被选中,填充空心成实体
        if (id.equals(selectedId)) g2d.fillOval((int) geoCoords.x, (int) geoCoords.y, 10, 10);

        if (signsdb.get(feature) != null) {
          StructOffset offset = (StructOffset) (signsdb.get(feature));
          double offsetX = offset.getX();
          double offsetY = offset.getY();
          signCoords = new DirectPosition2D(geoCoords.x + offsetX, geoCoords.y + offsetY);
        }

        if (signCoords != null) {
          // 坐标默认偏移量<-25,-60>
          int width = 60, height = 40;
          g2d.setColor(Color.CYAN);
          g2d.drawLine(
              (int) geoCoords.x + 5,
              (int) geoCoords.y + 5,
              (int) signCoords.x + offsetX + width / 2,
              (int) signCoords.y + offsetY + height / 2);
          g2d.setColor(Color.BLACK);
          g2d.drawRect((int) signCoords.x + offsetX, (int) signCoords.y + offsetY, width, height);
          g2d.setColor(Color.ORANGE);
          g2d.fillRect((int) signCoords.x + offsetX, (int) signCoords.y + offsetY, width, height);
          g2d.setColor(Color.RED);
          String signsText = (String) feature.getAttribute("name");
          g2d.drawString(
              signsText, (int) signCoords.x + offsetX + 2, (int) signCoords.y + offsetY + 12);
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }

    // 绘制指南针
    //		int x[] = {20,10,20,30};
    //		int y[] = {10,20,30,20};
    //		int nPoint = 4;
    //		g2d.drawPolygon(x, y, nPoint);
    String APP_PATH = "";
    Bundle bundle = Platform.getBundle("MapControl");
    try {
      APP_PATH =
          FileLocator.resolve(bundle.getEntry("")).getPath().substring(1) + "icons/map/compass.png";
    } catch (Exception e) {
      System.out.println(e.getMessage());
      System.exit(1);
    }
    Image src = Toolkit.getDefaultToolkit().getImage(APP_PATH);
    double dx = 0.72, dy = 0.72;
    double x = 10, y = 10; // 指南针左上角
    g2d.rotate(
        -MainMapViewPart.rotateAngle + (Math.PI / 360) * 40,
        x + dx * src.getWidth(null) / 2,
        y + dy * src.getHeight(null) / 2);
    AffineTransform affine = new AffineTransform();
    affine.setToTranslation(x, y);
    affine.scale(dx, dy); // 缩放图片
    g2d.drawImage(src, affine, null);
  }