Add graphics with symbols

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Sample viewer app

Use a symbol style to display a graphic on a graphics overlay.

Image of adding graphics with symbols

Use case

Allows you to customize a graphic by assigning a unique symbol. For example, you may wish to display individual graphics for different landmarks across a region, and to style each one with a unique symbol.

How to use the sample

Pan and zoom around the map. Observe the graphics on the map.

How it works

  1. Create a GraphicsOverlay and add it to the MapView.
  2. Create a Symbol such as SimpleMarkerSymbol, SimpleLineSymbol, SimpleFillSymbol or TextSymbol.
  3. Create a Graphic, specifying a Geometry and a symbol.
  4. Add the graphic to the graphics overlay.

Relevant API

  • Geometry
  • Graphic
  • GraphicsOverlay
  • SimpleFillSymbol
  • SimpleLineSymbol
  • SimpleMarkerSymbol
  • TextSymbol

Additional information

To set a symbol style across a number of graphics (e.g. showing trees as graphics sharing a symbol in a park), see the "Add graphics with renderer" sample.

Tags

display, fill, graphics, line, marker, overlay, point, symbol

Sample Code

AddGraphicsWithSymbolsSample.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_symbols;

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

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.PointCollection;
import com.esri.arcgisruntime.geometry.Polygon;
import com.esri.arcgisruntime.geometry.Polyline;
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.SimpleFillSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;
import com.esri.arcgisruntime.symbology.TextSymbol;
import com.esri.arcgisruntime.symbology.TextSymbol.HorizontalAlignment;
import com.esri.arcgisruntime.symbology.TextSymbol.VerticalAlignment;

public class AddGraphicsWithSymbolsSample extends Application {

  private MapView mapView;
  private GraphicsOverlay graphicsOverlay;

  private static final SpatialReference SPATIAL_REFERENCE = SpatialReferences.getWgs84();

  private static final int BLUE = 0xFF0000E6;

  @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 Symbols 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 oceans basemap style
      final ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_OCEANS);

      // 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(56.075844, -2.681572, 72223));

      // create the graphics overlay
      graphicsOverlay = new GraphicsOverlay();

      // add the graphic overlay to the map view
      mapView.getGraphicsOverlays().add(graphicsOverlay);

      // add some red circled points to the graphics overlay
      createPoints();

      // add the purple polyline to the graphics overlay
      createPolyline();

      // add the green polygon mesh to the graphics overlay
      createPolygon();

      // add the blue text symbols to the graphics overlay
      createText();

      // add the map view to stack pane
      stackPane.getChildren().add(mapView);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  /**
   * Creates four Points using a SimpleMarkerSymbol and adds them to a
   * GraphicsOverlay.
   */
  private void createPoints() {

    // create a red (0xFFFF0000) circle simple marker symbol
    SimpleMarkerSymbol redCircleSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE, 0xFFFF0000, 10);

    // create graphics and add to graphics overlay
    Graphic graphic;
    graphic = new Graphic(new Point(-2.72, 56.065, SPATIAL_REFERENCE), redCircleSymbol);
    graphicsOverlay.getGraphics().add(graphic);

    graphic = new Graphic(new Point(-2.69, 56.065, SPATIAL_REFERENCE), redCircleSymbol);
    graphicsOverlay.getGraphics().add(graphic);

    graphic = new Graphic(new Point(-2.66, 56.065, SPATIAL_REFERENCE), redCircleSymbol);
    graphicsOverlay.getGraphics().add(graphic);

    graphic = new Graphic(new Point(-2.63, 56.065, SPATIAL_REFERENCE), redCircleSymbol);
    graphicsOverlay.getGraphics().add(graphic);
  }

  /**
   * Creates a Polyline and adds it to a GraphicsOverlay.
   */
  private void createPolyline() {

    // create a purple (0xFF800080) simple line symbol
    SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.DASH, 0xFF800080, 4);

    // create a new point collection for polyline
    PointCollection points = new PointCollection(SPATIAL_REFERENCE);

    // create and add points to the point collection
    points.add(new Point(-2.715, 56.061));
    points.add(new Point(-2.6438, 56.079));
    points.add(new Point(-2.638, 56.079));
    points.add(new Point(-2.636, 56.078));
    points.add(new Point(-2.636, 56.077));
    points.add(new Point(-2.637, 56.076));
    points.add(new Point(-2.715, 56.061));

    // create the polyline from the point collection
    Polyline polyline = new Polyline(points);

    // create the graphic with polyline and symbol
    Graphic graphic = new Graphic(polyline, lineSymbol);

    // add graphic to the graphics overlay
    graphicsOverlay.getGraphics().add(graphic);
  }

  /**
   * Creates a Polygon and adds it to a GraphicsOverlay.
   */
  private void createPolygon() {

    // create a green (0xFF005000) simple line symbol
    SimpleLineSymbol outlineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.DASH, 0xFF005000, 1);
    // create a green (0xFF005000) mesh simple fill symbol
    SimpleFillSymbol fillSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.DIAGONAL_CROSS, 0xFF005000,
        outlineSymbol);

    // create a new point collection for polygon
    PointCollection points = new PointCollection(SPATIAL_REFERENCE);

    // create and add points to the point collection
    points.add(new Point(-2.6425, 56.0784));
    points.add(new Point(-2.6430, 56.0763));
    points.add(new Point(-2.6410, 56.0759));
    points.add(new Point(-2.6380, 56.0765));
    points.add(new Point(-2.6380, 56.0784));
    points.add(new Point(-2.6410, 56.0786));

    // create the polyline from the point collection
    Polygon polygon = new Polygon(points);

    // create the graphic with polyline and symbol
    Graphic graphic = new Graphic(polygon, fillSymbol);

    // add graphic to the graphics overlay
    graphicsOverlay.getGraphics().add(graphic);
  }

  /**
   * Creates two TextSymbols and adds them to a GraphicsOverlay.
   */
  private void createText() {

    // create two text symbols
    TextSymbol bassRockTextSymbol = new TextSymbol(10, "Bass Rock", BLUE, HorizontalAlignment.LEFT,
        VerticalAlignment.BOTTOM);

    TextSymbol craigleithTextSymbol = new TextSymbol(10, "Craigleith", BLUE, HorizontalAlignment.RIGHT,
        VerticalAlignment.TOP);

    // create two points
    Point bassPoint = new Point(-2.64, 56.079, SPATIAL_REFERENCE);
    Point craigleithPoint = new Point(-2.72, 56.076, SPATIAL_REFERENCE);

    // create two graphics from the points and symbols
    Graphic bassRockGraphic = new Graphic(bassPoint, bassRockTextSymbol);
    Graphic craigleithGraphic = new Graphic(craigleithPoint, craigleithTextSymbol);

    // add graphics to the graphics overlay
    graphicsOverlay.getGraphics().add(bassRockGraphic);
    graphicsOverlay.getGraphics().add(craigleithGraphic);
  }

  /**
   * 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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