Display KML network links

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/*
 * Copyright 2018 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.display_kml_network_links;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
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.SpatialReferences;
import com.esri.arcgisruntime.layers.KmlLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.SceneView;
import com.esri.arcgisruntime.ogc.kml.KmlDataset;

public class DisplayKMLNetworkLinksSample extends Application {

  private SceneView sceneView;

  @Override
  public void start(Stage stage) {

    try {
      // create stack pane and application scene
      StackPane stackPane = new StackPane();
      Scene fxScene = new Scene(stackPane);
      fxScene.getStylesheets().add(getClass().getResource("/display_kml_network_links/style.css").toExternalForm());

      // set title, size, and add scene to stage
      stage.setTitle("Display KML Network Links Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(fxScene);
      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 scene with basemap style and add it to the scene view
      ArcGISScene scene = new ArcGISScene(BasemapStyle.ARCGIS_IMAGERY);
      sceneView = new SceneView();
      sceneView.setArcGISScene(scene);

      // start centered over Germany
      sceneView.setViewpoint(new Viewpoint(new Point(8.150526, 50.472421, SpatialReferences.getWgs84()), 2000000));

      // create a KML dataset from KML hosted at a URL
      KmlDataset kmlDataset = new KmlDataset("https://www.arcgis.com/sharing/rest/content/items/600748d4464442288f6db8a4ba27dc95/data");

      // show an alert when any network link messages are received
      kmlDataset.addKmlNetworkLinkMessageReceivedListener(kmlNetworkLinkMessageReceivedEvent -> {
        Alert alert = new Alert(Alert.AlertType.INFORMATION, kmlNetworkLinkMessageReceivedEvent.getMessage());
        alert.setHeaderText("KML Network Link Message");
        alert.initOwner(sceneView.getScene().getWindow());
        alert.show();
      });

      // add the KML layer as an operational layer and check if it is loaded correctly
      KmlLayer kmlLayer = new KmlLayer(kmlDataset);
      scene.getOperationalLayers().add(kmlLayer);
      kmlLayer.addDoneLoadingListener(() -> {
        if (kmlLayer.getLoadStatus() != LoadStatus.LOADED) {
          new Alert(Alert.AlertType.ERROR, "Error loading KML layer").show();
        }
      });

      // add the map view and list view to the stack pane
      stackPane.getChildren().add(sceneView);
    } 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);
  }

}