Show labels on layer in 3D

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/*
 * Copyright 2021 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.show_labels_on_layer_in_3d;

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

import com.esri.arcgisruntime.arcgisservices.LabelingPlacement;
import com.esri.arcgisruntime.arcgisservices.LabelDefinition;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.labeling.ArcadeLabelExpression;
import com.esri.arcgisruntime.mapping.view.SceneView;
import com.esri.arcgisruntime.portal.Portal;
import com.esri.arcgisruntime.portal.PortalItem;
import com.esri.arcgisruntime.symbology.ColorUtil;
import com.esri.arcgisruntime.symbology.TextSymbol;

public class ShowLabelsOnLayerIn3dSample extends Application {

  private SceneView sceneView;

  @Override
  public void start(Stage stage) {

    try {

      // create stack pane and JavaFX app scene
      StackPane stackPane = new StackPane();
      Scene fxScene = new Scene(stackPane);

      // set title, size, and add the JavaFX scene to stage
      stage.setTitle("Show Labels on Layer in 3D");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(fxScene);
      stage.show();

      // create a scene from an ArcGIS Online portal item
      var portalItem = new PortalItem(
        new Portal("https://www.arcgis.com", false), "850dfee7d30f4d9da0ebca34a533c169");
      ArcGISScene scene = new ArcGISScene(portalItem);

      // set the scene to the sceneview, and add the sceneview to the JavaFX stack pane
      sceneView = new SceneView();
      sceneView.setArcGISScene(scene);
      // create a progress indicator and display it to indicate loading is in progress
      var progressIndicator = new ProgressIndicator();
      progressIndicator.setVisible(true);
      stackPane.getChildren().addAll(sceneView, progressIndicator);

      scene.addDoneLoadingListener(() -> {
        if (scene.getLoadStatus() == LoadStatus.LOADED) {
          // remove the progress indicator when the scene loads
          progressIndicator.setVisible(false);

          // filter through the scene's operational layers to find the layer named "Gas",
          // and find the "Gas Main" sublayer to apply the label definition to
          scene.getOperationalLayers().stream()
            .filter(layer -> layer.getName().equals("Gas"))
            .flatMap(gasLayer -> gasLayer.getSubLayerContents().stream())
            .filter(subLayer -> subLayer.getName().equals("Gas Main"))
            .findFirst()
            .ifPresent(gasMainSubLayer -> {
                FeatureLayer featureLayer = (FeatureLayer) gasMainSubLayer;
                // enable the labelling for the feature layer
                featureLayer.setLabelsEnabled(true);
                // clear any existing label definitions on the layer
                featureLayer.getLabelDefinitions().clear();

                // create a text symbol to set to the label definition
                var textSymbol = new TextSymbol();
                textSymbol.setColor(ColorUtil.colorToArgb(Color.ORANGE));
                textSymbol.setHaloColor(ColorUtil.colorToArgb(Color.WHITE));
                textSymbol.setHaloWidth(2);
                textSymbol.setSize(16);

                // create a label definition with an Arcade expression script
                var arcadeLabelExpression = new ArcadeLabelExpression("Text($feature.INSTALLATIONDATE, `DD MMM YY`)");

                var labelDefinition = new LabelDefinition(arcadeLabelExpression, textSymbol);
                labelDefinition.setPlacement(LabelingPlacement.LINE_ABOVE_ALONG);
                labelDefinition.setUseCodedValues(true);

                // add the label definition to the feature layer
                featureLayer.getLabelDefinitions().add(labelDefinition);
            });
        } else {
          new Alert(Alert.AlertType.ERROR, "Scene failed to load " + scene.getLoadError().getCause()).show();
        }
      });
    } catch (Exception e) {
      // on any error, display the stack trace.
      e.printStackTrace();
    }
  }

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

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

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

    Application.launch(args);
  }

}