/**
   * This example shows how to obtain a color.
   *
   * @param g
   * @param monitor
   * @throws RenderException
   */
  public void render(Graphics2D g, IProgressMonitor monitor) throws RenderException {
    if (monitor == null) monitor = new NullProgressMonitor();

    CsvReader reader = null;
    try {
      ILayer layer = getContext().getLayer();
      IGeoResource resource = layer.findGeoResource(CSV.class);
      if (resource == null) return;
      ReferencedEnvelope bounds = getRenderBounds();
      monitor.subTask("connecting");
      CSV csv = resource.resolve(CSV.class, null);
      // LOOK UP STYLE
      IStyleBlackboard style = layer.getStyleBlackboard();
      Color color = (Color) style.get(ColorStyle.ID);

      // DATA TO WORLD
      CoordinateReferenceSystem dataCRS = layer.getCRS();
      CoordinateReferenceSystem worldCRS = context.getCRS();
      MathTransform dataToWorld = CRS.findMathTransform(dataCRS, worldCRS, false);

      // DRAW FILE
      monitor.beginTask("csv render", csv.getSize());
      reader = csv.reader();
      reader.readHeaders();
      int nameIndex = reader.getIndex("name");
      Coordinate worldLocation = new Coordinate();
      while (reader.readRecord()) {
        Point point = CSV.getPoint(reader);
        Coordinate dataLocation = point.getCoordinate();
        try {
          JTS.transform(dataLocation, worldLocation, dataToWorld);
        } catch (TransformException e) {
          continue;
        }
        if (bounds != null && !bounds.contains(worldLocation)) {
          continue; // optimize!
        }
        java.awt.Point p = getContext().worldToPixel(worldLocation);

        g.setColor(color);
        g.fillRect(p.x - 2, p.y - 2, 6, 6);

        g.setColor(Color.BLACK);
        String name = reader.get(nameIndex);
        g.drawString(name, p.x + 15, p.y + 15);
        monitor.worked(1);
        if (monitor.isCanceled()) break;
      }
    } catch (IOException e) {
      throw new RenderException(e); // rethrow any exceptions encountered
    } catch (FactoryException e) {
      throw new RenderException(e); // rethrow any exceptions encountered
    } finally {
      if (reader != null) reader.close();
      monitor.done();
    }
  }
  private WMTSource getWmtSourceFromLayer(ILayer layer) {
    IGeoResource resource = layer.findGeoResource(WMTSource.class);

    if (resource != null) {
      WMTSource wmtSource = null;
      try {
        wmtSource = resource.resolve(WMTSource.class, null);

        return wmtSource;
      } catch (Exception e) {
      }
    }

    return null;
  }
Exemplo n.º 3
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  public boolean canAddLayer(ILayer layer) {

    if (!layer.hasResource(Layer.class)) return false;

    try {
      if (!layer
          .findGeoResource(Layer.class)
          .parent(ProgressManager.instance().get())
          .equals(getRenderContext().getGeoResource().parent(ProgressManager.instance().get())))
        return false;
    } catch (IOException e2) {
      return false;
    }

    double opacity = Double.NaN;

    ICompositeRenderContext context1 = (ICompositeRenderContext) context;

    IRenderContext[] contexts =
        context1.getContexts().toArray(new IRenderContext[context1.getContexts().size()]);
    Arrays.sort(contexts);
    List<Layer> owsLayers = new ArrayList<Layer>();
    IService currentService;
    try {
      owsLayers.add(layer.getResource(Layer.class, new NullProgressMonitor()));
      currentService = layer.getResource(IService.class, null);
    } catch (IOException e1) {
      WMSPlugin.log("", e1); // $NON-NLS-1$
      return false;
    }
    for (IRenderContext renderContext : contexts) {
      ILayer previousLayer = renderContext.getLayer();

      try {
        owsLayers.add(previousLayer.getResource(Layer.class, new NullProgressMonitor()));
        IService previousService = previousLayer.getResource(IService.class, null);
        if (currentService != previousService) {
          return false;
        }
      } catch (IOException e) {
        WMSPlugin.log("Error while retrieving service.", e); // $NON-NLS-1$
        return false;
      }

      if (BasicWMSRenderer2.findRequestCRS(owsLayers, context.getCRS(), context.getMap()) == null)
        return false;

      Style style = (Style) previousLayer.getStyleBlackboard().get(SLDContent.ID);
      if (style != null) {
        opacity = SLDs.rasterOpacity(SLDs.rasterSymbolizer(style));
      }
    }

    Style style = (Style) layer.getStyleBlackboard().get(SLDContent.ID);
    if (style == null && Double.isNaN(opacity)) {
      return true;
    }

    double result = SLDs.rasterOpacity(SLDs.rasterSymbolizer(style));

    if (result == opacity) {
      return true;
    }
    return false;
  }