Apply unique values with alternate symbols

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/*
 * Copyright 2022 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.apply_unique_values_with_alternate_symbols;

import java.util.List;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.paint.Paint;
import javafx.stage.Stage;

import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.mapping.view.AnimationCurve;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.data.ServiceFeatureTable;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.symbology.MultilayerPointSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;
import com.esri.arcgisruntime.symbology.SymbolReferenceProperties;
import com.esri.arcgisruntime.symbology.UniqueValueRenderer;

public class ApplyUniqueValuesWithAlternateSymbolsSample extends Application {

  private MapView mapView;
  private ServiceFeatureTable serviceFeatureTable; // keep loadable in scope to avoid garbage collection
  private final static String FEATURE_SERVICE_URL = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/SF311/FeatureServer/0";
  private Button button;
  private Label label;
  private VBox vBox;

  @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("Apply Unique Values With Alternate Symbols");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

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

      // create a controls vbox, button, and label UI components
      setUpControlsVBox();

      // create a map with the topographic imagery 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);

      // create a point located at San Francisco, CA to be used as the viewpoint for the map
      var point = new Point(-13631205.660131, 4546829.846004, SpatialReferences.getWebMercator());
      var viewpoint = new Viewpoint(point, 25000);

      // set the viewpoint to the map view
      mapView.setViewpointCenterAsync(point, 25000.0);

      button.setOnAction(event -> {
        // reset the map viewpoint
        mapView.setViewpointAsync(viewpoint, 1.5f, AnimationCurve.EASE_IN_OUT_SINE);
      });

      mapView.addViewpointChangedListener(event-> {
        // update label text and formatting scale values
        label.setText("Current scale: 1:" + Math.round(mapView.getMapScale()));
      });

      // create simple marker symbols where the blue square and yellow diamond are alternate symbols
      // the red triangle is used to create a unique symbol and the purple diamond is the default symbol for the unique value renderer
      SimpleMarkerSymbol simpleBlueSquareSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.SQUARE, 0xFF0000FF, 15);
      SimpleMarkerSymbol simpleYellowDiamondSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.DIAMOND, 0xFFFFFF00, 15);
      SimpleMarkerSymbol simpleRedTriangleSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.TRIANGLE, 0xFFFF0000, 15);
      SimpleMarkerSymbol simplePurpleDiamondSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.DIAMOND, 0xFF800080, 12);

      // convert simple marker symbols to multilayer point symbols
      MultilayerPointSymbol multilayerBlueSquareSymbol = simpleBlueSquareSymbol.toMultilayerSymbol();
      MultilayerPointSymbol multilayerYellowDiamondSymbol = simpleYellowDiamondSymbol.toMultilayerSymbol();
      MultilayerPointSymbol multilayerRedTriangleSymbol = simpleRedTriangleSymbol.toMultilayerSymbol();
      MultilayerPointSymbol multilayerPurpleDiamondSymbol = simplePurpleDiamondSymbol.toMultilayerSymbol();

      // set scale range values through reference properties for the multilayer symbols
      multilayerBlueSquareSymbol.setReferenceProperties(new SymbolReferenceProperties(10000.0, 5000.0));
      multilayerYellowDiamondSymbol.setReferenceProperties(new SymbolReferenceProperties(20000.0, 10000.0));
      multilayerRedTriangleSymbol.setReferenceProperties(new SymbolReferenceProperties(5000.0, 0.0));

      // create unique value for the red triangle and list of alternate symbols
      var uniqueValue = new UniqueValueRenderer.UniqueValue("unique values based on request type", "unique value",
          multilayerRedTriangleSymbol, List.of("Damaged Property"), List.of(multilayerBlueSquareSymbol, multilayerYellowDiamondSymbol));

      // create unique value renderer
      var uniqueValRenderer = new UniqueValueRenderer(List.of("req_type"), List.of(uniqueValue), "", multilayerPurpleDiamondSymbol);

      // apply default symbol for the unique value renderer
      uniqueValRenderer.setDefaultSymbol(multilayerPurpleDiamondSymbol);

      // create a service feature table using the feature service url
      serviceFeatureTable = new ServiceFeatureTable(FEATURE_SERVICE_URL);

      // check the service feature table has loaded before adding the feature layer to the map
      serviceFeatureTable.addDoneLoadingListener( () -> {
        if (serviceFeatureTable.getLoadStatus() == LoadStatus.LOADED) {
          // create a feature layer from the service feature table
          var featureLayer = new FeatureLayer(serviceFeatureTable);
          // set the unique value renderer on the feature layer
          featureLayer.setRenderer(uniqueValRenderer);
          map.getOperationalLayers().add(featureLayer);
          vBox.setDisable(false);
        } else {
          new Alert(Alert.AlertType.ERROR,
            "Error loading Feature Table from Service: " + serviceFeatureTable.getLoadError().getMessage()).show();
        }
      });
      // load the service feature table
      serviceFeatureTable.loadAsync();

      // add the map view and UI elements to the stack pane
      stackPane.getChildren().addAll(mapView, vBox);
      StackPane.setAlignment(vBox, Pos.TOP_LEFT);
      StackPane.setMargin(vBox, new Insets(10, 0, 0, 10));

    } catch (Exception e) {
      // on any error, display the stack trace.
      e.printStackTrace();
    }
  }

  /**
   * Creates a UI with three buttons and a label.
   */
  private void setUpControlsVBox() {

    // create label to show scale values and button to reset viewpoint
    label = new Label("Current scale: 1:25000");
    label.setStyle("-fx-text-fill: white");
    button = new Button("Reset Viewpoint");

    // create and configure a VBox
    vBox = new VBox(10);
    vBox.setBackground(new Background(new BackgroundFill(Paint.valueOf("rgba(0,0,0,0.6)"),
      CornerRadii.EMPTY, Insets.EMPTY)));
    vBox.setPadding(new Insets(10.0));
    vBox.setMaxSize(180, 75);
    vBox.setDisable(true);

    // add the label and button to the VBos
    vBox.getChildren().addAll(label, button);

  }

  /**
   * 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);
  }

}