Play KML Tour

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Sample viewer app

Play tours in KML files.

Image of play KML tour

Use case

KML, the file format used by Google Earth, supports creating tours, which can control the viewpoint of the scene, hide and show content, and play audio. Tours allow you to easily share tours of geographic locations, which can be augmented with rich multimedia. Runtime allows you to consume these tours using a simple API.

How to use the sample

The sample will load the KMZ file from ArcGIS Online. Click the play button to start the tour. The narration audio will start and then the viewpoint will animate. Press the button again to pause the tour. To restart the tour, hit the refresh button and then the play button.

How it works

  1. Create a KmlDataset with the path to a local KML file with a KML tour.
  2. Create and load a KmlLayer with the dataset.
  3. When the layer has loaded, search its KmlNodes by recursing through kmlLayer.getRootNodes() to find a KmlTour node.
  4. Create a KmlTourController and set the tour with kmlTourController.setTour(kmlTour).
  5. Use kmltourController.play(), kmltourController.pause(), and kmltourController.reset() to control the tour.

Relevant API

  • KmlTour
  • KmlTourController

About the data

This sample uses a custom tour created by a member of the ArcGIS Runtime API samples team. When you play the tour, you'll see a narrated journey through some of Esri's offices.

Additional information

See Touring in KML in Keyhole Markup Language for more information.

Tags

animation, interactive, KML, narration, pause, play, story, tour

Sample Code

PlayAKMLTourSample.java
                                                                                                                                                                                                               
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/*
 * Copyright 2019 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.play_a_kml_tour;

import java.io.File;
import java.io.IOException;
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.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import com.esri.arcgisruntime.layers.KmlLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.ArcGISTiledElevationSource;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Surface;
import com.esri.arcgisruntime.mapping.view.SceneView;
import com.esri.arcgisruntime.ogc.kml.KmlContainer;
import com.esri.arcgisruntime.ogc.kml.KmlDataset;
import com.esri.arcgisruntime.ogc.kml.KmlNode;
import com.esri.arcgisruntime.ogc.kml.KmlTour;
import com.esri.arcgisruntime.ogc.kml.KmlTourController;
import com.esri.arcgisruntime.ogc.kml.KmlTourStatus;

public class PlayAKMLTourSample extends Application {

  private KmlTourController kmlTourController;
  private SceneView sceneView;

  @Override
  public void start(Stage stage) throws IOException {
    try {
      // create stack pane and application scene
      StackPane stackPane = new StackPane();
      Scene fxScene = new Scene(stackPane);

      // set up the stage
      stage.setTitle("Play a KML Tour Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(fxScene);
      stage.show();

      // create a scene and show it in a scene view
      sceneView = new SceneView();
      ArcGISScene scene = new ArcGISScene(Basemap.createImagery());
      sceneView.setArcGISScene(scene);

      // add elevation data
      Surface surface = new Surface();
      surface.getElevationSources().add(new ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"));
      scene.setBaseSurface(surface);

      // create play/pause button
      final ImageView playIcon = new ImageView(new Image(PlayAKMLTourSample.class.getResourceAsStream(
          "/play.png")));
      final ImageView pauseIcon = new ImageView(new Image(PlayAKMLTourSample.class.getResourceAsStream(
          "/pause.png")));

      Button playPauseButton = new Button();
      playPauseButton.setGraphic(playIcon);
      playPauseButton.setDisable(true);

      playPauseButton.setOnAction(e -> {
        if (kmlTourController.getTour().getTourStatus() == KmlTourStatus.PLAYING) {
          kmlTourController.pause();
        } else {
          kmlTourController.play();
        }
      });

      // create replay button
      final ImageView replayIcon = new ImageView(new Image(PlayAKMLTourSample.class.getResourceAsStream(
          "/replay.png")));

      Button replayButton = new Button();
      replayButton.setGraphic(replayIcon);
      replayButton.setDisable(true);

      replayButton.setOnAction(e -> {
        kmlTourController.reset();
        playPauseButton.setGraphic(playIcon);
        playPauseButton.setDisable(false);
      });

      VBox controlsVBox = new VBox(6);
      controlsVBox.setMaxSize(50, 100);
      controlsVBox.getChildren().addAll(playPauseButton, replayButton);

      // add a KML layer from a KML dataset with a KML tour
      KmlDataset kmlDataset = new KmlDataset(new File(System.getProperty("data.dir"), "./samples-data/kml/Esri_tour.kmz").getAbsolutePath());
      KmlLayer kmlLayer = new KmlLayer(kmlDataset);
      scene.getOperationalLayers().add(kmlLayer);

      kmlLayer.addDoneLoadingListener(() -> {
        if (kmlLayer.getLoadStatus() == LoadStatus.LOADED) {
          // find the first KML tour in the dataset when loaded
          KmlTour kmlTour = findFirstKMLTour(kmlDataset.getRootNodes());
          if (kmlTour != null) {
            // enable/disable buttons based on the KML tour status
            kmlTour.addStatusChangedListener(kmlTourStatusChangedEvent -> {
              switch (kmlTourStatusChangedEvent.getStatus()) {
                case NOT_INITIALIZED:
                  // before kml tour is added to controller
                case INITIALIZING:
                  // when kml tour is added to controller
                  playPauseButton.setDisable(true);
                  replayButton.setDisable(true);
                  break;
                case INITIALIZED:
                  // when kml tour is ready to be played
                  playPauseButton.setDisable(false);
                  replayButton.setDisable(false);
                  break;
                case PAUSED:
                  playPauseButton.setGraphic(playIcon);
                  break;
                case PLAYING:
                  playPauseButton.setGraphic(pauseIcon);
                  break;
                case COMPLETED:
                  playPauseButton.setDisable(true);
                  break;
              }
            });

            // set the tour to the tour controller
            kmlTourController = new KmlTourController();
            kmlTourController.setTour(kmlTour);
          } else {
            new Alert(Alert.AlertType.WARNING, "No KML tour found in dataset").show();
          }
        } else {
          new Alert(Alert.AlertType.ERROR, "KML Layer failed to load").show();
        }
      });

      stackPane.getChildren().addAll(sceneView, controlsVBox);
      StackPane.setMargin(controlsVBox, new Insets(10));
      StackPane.setAlignment(controlsVBox, Pos.TOP_LEFT);
    } catch (Exception ex) {
      // on any exception, print the stack trace
      ex.printStackTrace();
    }
  }

  /**
   * Recursively searches for the first KML tour in a list of KML nodes.
   *
   * @return the first KML tour or null if there are no tours.
   */
  private KmlTour findFirstKMLTour(List<KmlNode> kmlNodes) {
    for (KmlNode node : kmlNodes) {
      if (node instanceof KmlTour) {
        return (KmlTour) node;
      } else if (node instanceof KmlContainer) {
        return findFirstKMLTour(((KmlContainer) node).getChildNodes());
      }
    }
    return null;
  }

  /**
   * 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);
  }
}

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