Add graphics with renderer

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Sample viewer app

A renderer allows you to change the style of all graphics in a graphics overlay by referencing a single symbol style. A renderer will only affect graphics that do not specify their own symbol style.

Image of adding graphics with renderer

Use case

A renderer allows you to change the style of all graphics in an overlay by only changing one copy of the symbol. For example, a user may wish to display a number of graphics on a map of parkland which represent trees, all sharing a common symbol.

How to use the sample

Pan and zoom on the map to view graphics for points, lines, and polygons (including polygons with curve segments) which are stylized using renderers.

How it works

  1. Create a GraphicsOverlay and add it to the MapView.
  2. Create a Graphic, specifying only a Geometry.
  3. Create a single Symbol such as a SimpleMarkerSymbol.
  4. Create a renderer with the symbol, such as new SimpleRenderer(symbol).
  5. Set the renderer on the graphics overlay with graphicsOverlay.setRenderer(renderer).

Relevant API

  • CubicBezierSegment
  • EllipticArcSegment
  • Geometry
  • Graphic
  • GraphicsOverlay
  • Part
  • PolygonBuilder
  • PolylineBuilder
  • SimpleFillSymbol
  • SimpleLineSymbol
  • SimpleMarkerSymbol
  • SimpleRenderer

Additional information

To set unique symbols across a number of graphics (e.g. showing graphics of individual landmarks) see "Add graphics with symbols" sample.

Tags

arc, bezier, curve, display, graphics, marker, overlay, renderer, segment, symbol, true curve

Sample Code

AddGraphicsWithRendererSample.java
                                                                                                                                                                                                                         
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/*
 * Copyright 2017 Esri.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.esri.samples.add_graphics_with_renderer;

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.CubicBezierSegment;
import com.esri.arcgisruntime.geometry.EllipticArcSegment;
import com.esri.arcgisruntime.geometry.Geometry;
import com.esri.arcgisruntime.geometry.Part;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.PolygonBuilder;
import com.esri.arcgisruntime.geometry.PolylineBuilder;
import com.esri.arcgisruntime.geometry.SpatialReference;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.Graphic;
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.ColorUtil;
import com.esri.arcgisruntime.symbology.SimpleFillSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;
import com.esri.arcgisruntime.symbology.SimpleRenderer;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

import java.util.Arrays;

public class AddGraphicsWithRendererSample extends Application {

  private MapView mapView;

  @Override
  public void start(Stage stage) {

    try {
      // create stack pane and application scene
      StackPane stackPane = new StackPane();
      Scene scene = new Scene(stackPane);

      // set title, size, and add scene to stage
      stage.setTitle("Add Graphics with Renderer Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // authentication with an API key or named user is required to access basemaps and other location services
      String yourAPIKey = System.getProperty("apiKey");
      ArcGISRuntimeEnvironment.setApiKey(yourAPIKey);

      // create a map with the topographic basemap style
      ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);

      // create a map view and set the map to it
      mapView = new MapView();
      mapView.setMap(map);

      // set a viewpoint on the map view
      mapView.setViewpoint(new Viewpoint(15.169193, 16.333479, 1479143818));

      // create a graphics overlay for displaying point graphic
      GraphicsOverlay pointGraphicOverlay = new GraphicsOverlay();
      // create point geometry
      Point point = new Point(40e5, 40e5, SpatialReferences.getWebMercator());
      // create graphic for point
      Graphic pointGraphic = new Graphic(point);
      // green diamond point symbol
      SimpleMarkerSymbol pointSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.DIAMOND, ColorUtil.colorToArgb(Color.GREEN), 10);
      // create simple renderer
      SimpleRenderer pointRenderer = new SimpleRenderer(pointSymbol);
      // set renderer on graphics overlay
      pointGraphicOverlay.setRenderer(pointRenderer);
      // add graphic to overlay
      pointGraphicOverlay.getGraphics().add(pointGraphic);
      // add graphics overlay to the MapView
      mapView.getGraphicsOverlays().add(pointGraphicOverlay);

      // solid blue line graphic
      GraphicsOverlay lineGraphicOverlay = new GraphicsOverlay();
      PolylineBuilder lineGeometry = new PolylineBuilder(SpatialReferences.getWebMercator());
      lineGeometry.addPoint(-10e5, 40e5);
      lineGeometry.addPoint(20e5, 50e5);
      Graphic lineGraphic = new Graphic(lineGeometry.toGeometry());
      lineGraphicOverlay.getGraphics().add(lineGraphic);
      SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, ColorUtil.colorToArgb(Color.BLUE), 5);
      SimpleRenderer lineRenderer = new SimpleRenderer(lineSymbol);
      lineGraphicOverlay.setRenderer(lineRenderer);
      mapView.getGraphicsOverlays().add(lineGraphicOverlay);

      // solid yellow polygon graphic
      GraphicsOverlay polygonGraphicOverlay = new GraphicsOverlay();
      PolygonBuilder polygonGeometry = new PolygonBuilder(SpatialReferences.getWebMercator());
      polygonGeometry.addPoint(-20e5, 20e5);
      polygonGeometry.addPoint(20e5, 20e5);
      polygonGeometry.addPoint(20e5, -20e5);
      polygonGeometry.addPoint(-20e5, -20e5);
      Graphic polygonGraphic = new Graphic(polygonGeometry.toGeometry());
      polygonGraphicOverlay.getGraphics().add(polygonGraphic);
      SimpleFillSymbol polygonSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, ColorUtil.colorToArgb(Color.YELLOW), null);
      SimpleRenderer polygonRenderer = new SimpleRenderer(polygonSymbol);
      polygonGraphicOverlay.setRenderer(polygonRenderer);
      mapView.getGraphicsOverlays().add(polygonGraphicOverlay);

      // polygon with curve segments (red heart) graphic
      GraphicsOverlay curvedGraphicOverlay = new GraphicsOverlay();
      // create a simple fill symbol with outline
      SimpleLineSymbol curvedLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, ColorUtil.colorToArgb(Color.BLACK), 1);
      SimpleFillSymbol curvedFillSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, ColorUtil.colorToArgb(Color.RED), curvedLineSymbol);
      SimpleRenderer curvedRenderer = new SimpleRenderer(curvedFillSymbol);
      curvedGraphicOverlay.setRenderer(curvedRenderer);
      // create a heart-shaped graphic and add it to the map view
      Point originPointForHeart = new Point(40e5, 5e5, SpatialReferences.getWebMercator());
      Geometry heartGeometry = makeHeartGeometry(originPointForHeart);
      Graphic heartGraphic = new Graphic(heartGeometry);
      curvedGraphicOverlay.getGraphics().add(heartGraphic);
      mapView.getGraphicsOverlays().add(curvedGraphicOverlay);

      // add the map view to stack pane
      stackPane.getChildren().add(mapView);

    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  /**
   * Create a heart-shaped geometry with bezier and elliptic arc segments.
   *
   * @param centerOfHeart the center of the square that contains the heart shape
   * @return a heart-shaped geometry
   */
  private Geometry makeHeartGeometry(Point centerOfHeart) {

    // define the side length of the square that contains the heart shape
    double sideLength = 10e5;
    // define a spatial reference to create segments with
    SpatialReference spatialReference = centerOfHeart.getSpatialReference();
    // define the x and y coordinates to simplify the calculation
    double minX = centerOfHeart.getX() - 0.5 * sideLength;
    double minY = centerOfHeart.getY() - 0.5 * sideLength;
    // define the radius of the arcs
    double arcRadius = sideLength * 0.25;

    // construct the bottom left curve
    Point leftCurveStart = new Point(centerOfHeart.getX(), minY);
    Point leftCurveEnd = new Point(minX, minY + 0.75 * sideLength);
    Point leftControlPoint1 = new Point(centerOfHeart.getX(), minY + 0.25 * sideLength);
    Point leftControlPoint2 = new Point(minX, centerOfHeart.getY());
    CubicBezierSegment leftCurve = new CubicBezierSegment(leftCurveStart, leftControlPoint1, leftControlPoint2, leftCurveEnd, spatialReference);

    // construct the top left arc
    Point leftArcCenter = new Point(minX + 0.25 * sideLength, minY + 0.75 * sideLength);
    EllipticArcSegment leftArc = EllipticArcSegment.createCircularEllipticArc(leftArcCenter, arcRadius, Math.PI, -Math.PI, spatialReference);

    // construct the top right arc
    Point rightArcCenter = new Point(minX + 0.75 * sideLength, minY + 0.75 * sideLength);
    EllipticArcSegment rightArc = EllipticArcSegment.createCircularEllipticArc(rightArcCenter, arcRadius, Math.PI, -Math.PI, spatialReference);

    // construct the bottom right curve
    Point rightCurveStart = new Point(minX + sideLength, minY + 0.75 * sideLength);
    Point rightControlPoint1 = new Point(minX + sideLength, centerOfHeart.getY());
    CubicBezierSegment rightCurve = new CubicBezierSegment(rightCurveStart, rightControlPoint1, leftControlPoint1, leftCurveStart, spatialReference);

    // create a part and add a collection of segments to it to define the heart shape
    Part part = new Part(spatialReference);
    part.addAll(Arrays.asList(leftCurve, leftArc, rightArc, rightCurve));

    // use a polygon builder to construct a heart shape from the parts above
    PolygonBuilder heartShape = new PolygonBuilder(spatialReference);
    heartShape.getParts().add(part);

    // return the geometry of the heart-shaped polygon
    return heartShape.toGeometry();
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() {

    if (mapView != null) {
      mapView.dispose();
    }
  }

  /**
   * Opens and runs application.
   *
   * @param args arguments passed to this application
   */
  public static void main(String[] args) {

    Application.launch(args);
  }
}

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