Examples with GraphicVisitor org.geotoolkit.display2d.GraphicVisitor used on opensource projects

Example 1 with GraphicVisitor

use of org.geotoolkit.display2d.GraphicVisitor in project geotoolkit by Geomatys.

the class PortrayalServiceTest method testCoverageVisit0_360.

/**
 * Test picking on a coverage in range 0-360.
 * @throws PortrayalException
 */
@Test
public void testCoverageVisit0_360() throws PortrayalException {
    // Create 0-360 coverage
    final BufferedImage img = new BufferedImage(350, 180, BufferedImage.TYPE_INT_ARGB);
    CoordinateReferenceSystem crs = CommonCRS.WGS84.normalizedGeographic();
    crs = AbstractCRS.castOrCopy(crs).forConvention(AxesConvention.POSITIVE_RANGE);
    final AffineTransform2D gridToCrs = new AffineTransform2D(1, 0, 0, -1, 0, 90);
    final GridExtent extent = new GridExtent(350, 180);
    final GridGeometry gg = new GridGeometry(extent, PixelInCell.CELL_CORNER, gridToCrs, crs);
    final GridCoverageBuilder gcb = new GridCoverageBuilder();
    gcb.setValues(img);
    gcb.setDomain(gg);
    final GridCoverage coverage = gcb.build();
    final GridCoverageResource gcr = new InMemoryGridCoverageResource(coverage);
    final MapLayer layer = MapBuilder.createCoverageLayer(gcr);
    final MapLayers context = MapBuilder.createContext();
    context.getComponents().add(layer);
    final GeneralEnvelope viewEnv = new GeneralEnvelope(CommonCRS.WGS84.normalizedGeographic());
    viewEnv.setRange(0, -180, +180);
    viewEnv.setRange(1, -90, +90);
    final AtomicInteger count = new AtomicInteger();
    GraphicVisitor gv = new GraphicVisitor() {

        @Override
        public void startVisit() {
        }

        @Override
        public void endVisit() {
        }

        @Override
        public void visit(Presentation graphic, RenderingContext context, SearchArea area) {
            count.incrementAndGet();
        }

        @Override
        public boolean isStopRequested() {
            return false;
        }
    };
    final SceneDef scene = new SceneDef(context);
    final CanvasDef canvas = new CanvasDef(new Dimension(360, 180), viewEnv);
    final VisitDef visit = new VisitDef(new Rectangle(10, 80, 2, 2), gv);
    DefaultPortrayalService.visit(canvas, scene, visit);
    assertEquals(1, count.get());
}

Example 2 with GraphicVisitor

use of org.geotoolkit.display2d.GraphicVisitor in project geotoolkit by Geomatys.

the class DefaultPortrayalService method visit.

public static void visit(final CanvasDef canvasDef, final SceneDef sceneDef, final VisitDef visitDef) throws PortrayalException {
    final Envelope contextEnv = canvasDef.getEnvelope();
    final Dimension canvasDimension = canvasDef.getDimension();
    final Hints hints = sceneDef.getHints();
    final MapLayers context = sceneDef.getContext();
    final boolean strechImage = canvasDef.isStretchImage();
    final J2DCanvasBuffered canvas = new J2DCanvasBuffered(contextEnv.getCoordinateReferenceSystem(), canvasDimension, hints);
    final ContextContainer2D renderer = new ContextContainer2D(canvas);
    canvas.setContainer(renderer);
    renderer.setContext(context);
    try {
        canvas.setObjectiveCRS(contextEnv.getCoordinateReferenceSystem());
    } catch (TransformException | FactoryException ex) {
        throw new PortrayalException("Could not set objective crs", ex);
    }
    // we specifically say to not repect X/Y proportions
    canvas.setAxisProportions(!strechImage);
    try {
        canvas.setVisibleArea(contextEnv);
    } catch (NoninvertibleTransformException | TransformException ex) {
        throw new PortrayalException(ex);
    }
    final Shape selectedArea = visitDef.getArea();
    final GraphicVisitor visitor = visitDef.getVisitor();
    try {
        canvas.getGraphicsIn(selectedArea, visitor);
    } catch (Exception ex) {
        if (ex instanceof PortrayalException) {
            throw (PortrayalException) ex;
        } else {
            throw new PortrayalException(ex);
        }
    } finally {
        visitor.endVisit();
        canvas.clearCache();
    }
}