List related features

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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.list_related_features;

import java.util.List;
import java.util.concurrent.ExecutionException;

import javafx.application.Application;
import javafx.geometry.Point2D;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Accordion;
import javafx.scene.control.Alert;
import javafx.scene.control.ListView;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.control.TitledPane;
import javafx.scene.input.MouseButton;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.data.ArcGISFeature;
import com.esri.arcgisruntime.data.ArcGISFeatureTable;
import com.esri.arcgisruntime.data.Feature;
import com.esri.arcgisruntime.data.RelatedFeatureQueryResult;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.GeoElement;
import com.esri.arcgisruntime.mapping.view.DrawStatus;
import com.esri.arcgisruntime.mapping.view.IdentifyLayerResult;
import com.esri.arcgisruntime.mapping.view.MapView;

public class ListRelatedFeaturesSample extends Application {

  private MapView mapView;
  private ArcGISMap map; // keep loadable in scope to avoid garbage collection

  @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("List Related Features Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // show a progress indicator while the map loads
      ProgressIndicator progressIndicator = new ProgressIndicator();
      progressIndicator.setProgress(ProgressIndicator.INDETERMINATE_PROGRESS);
      progressIndicator.setMaxSize(25, 25);

      // create an accordion view for displaying the related features according to their feature table
      Accordion accordion = new Accordion();
      accordion.setMaxSize(200, 300);

      // use the Alaska National Parks and Preserves Species web map
      map = new ArcGISMap("https://arcgisruntime.maps.arcgis.com/home/item.html?id=dcc7466a91294c0ab8f7a094430ab437");

      // add the map to the map view
      mapView = new MapView();
      mapView.setMap(map);

      // make selection outline yellow
      mapView.getSelectionProperties().setColor(Color.YELLOW);

      // display a progress indicator when drawing is in progress
      progressIndicator.visibleProperty().bind(mapView.drawStatusProperty().isEqualTo(DrawStatus.IN_PROGRESS));

      // wait until the map is done loading
      map.addDoneLoadingListener(() -> {
        // get the first feature layer for querying
        FeatureLayer featureLayer = (FeatureLayer) map.getOperationalLayers().get(0);

        mapView.setOnMouseClicked(event -> {
          // check for primary or secondary mouse click
          if (event.isStillSincePress() && event.getButton() == MouseButton.PRIMARY) {

            // clear previous selections
            featureLayer.clearSelection();

            // create a point from where the user clicked
            Point2D point = new Point2D(event.getX(), event.getY());

            // identify the clicked features
            ListenableFuture<IdentifyLayerResult> identifyLayerResult =
              mapView.identifyLayerAsync(featureLayer, point, 10, false, 1);
            identifyLayerResult.addDoneListener(() -> {

              try {
                IdentifyLayerResult identifiedLayer = identifyLayerResult.get();
                List<GeoElement> identifiedLayerGeoElements = identifiedLayer.getElements();
                // get the first selected feature
                for (GeoElement geoElement : identifiedLayerGeoElements) {
                  ArcGISFeature selectedFeature = (ArcGISFeature) geoElement;
                  featureLayer.selectFeature(selectedFeature);
                  // get the feature's feature table
                  ArcGISFeatureTable featureTable = selectedFeature.getFeatureTable();

                  // query related features
                  final ListenableFuture<List<RelatedFeatureQueryResult>> relatedFeatureQuery = featureTable
                    .queryRelatedFeaturesAsync(selectedFeature);
                  relatedFeatureQuery.addDoneListener(() -> {
                    try {
                      //clear previous results
                      accordion.getPanes().clear();
                      // add all related features (grouped) into panes of the accordion
                      List<RelatedFeatureQueryResult> results = relatedFeatureQuery.get();
                      for (RelatedFeatureQueryResult relatedFeatureQueryResult : results) {
                        ListView<String> featureList = new ListView<>();
                        String relatedTableName = relatedFeatureQueryResult.getRelatedTable().getTableName();
                        // create a pane for the feature table with a list for its features
                        TitledPane tablePane = new TitledPane(relatedTableName, featureList);
                        accordion.getPanes().add(tablePane);
                        for (Feature relatedFeature : relatedFeatureQueryResult) {
                          // show the related feature with its display field value in the list
                          ArcGISFeature feature = (ArcGISFeature) relatedFeature;
                          String displayFieldName = feature.getFeatureTable().getLayerInfo().getDisplayFieldName();
                          String displayFieldValue = feature.getAttributes().get(displayFieldName).toString();
                          featureList.getItems().add(displayFieldValue);
                        }
                      }
                      //expand the accordion's last pane to show the related features
                      accordion.setExpandedPane(accordion.getPanes().get(accordion.getPanes().size() - 1));
                    } catch (InterruptedException | ExecutionException e) {
                      Alert alert = new Alert(Alert.AlertType.ERROR, "Failed to get related features");
                      alert.show();
                    }
                  });
                }
              } catch (InterruptedException | ExecutionException e) {
                Alert alert = new Alert(Alert.AlertType.ERROR, "Failed to get identify the selected feature");
                alert.show();
              }
            });
          }
        });
      });

      // add the map view and accordion view to stack pane
      stackPane.getChildren().addAll(mapView, accordion, progressIndicator);
      StackPane.setAlignment(accordion, Pos.TOP_LEFT);
      StackPane.setAlignment(progressIndicator, Pos.CENTER);
    } 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 (mapView != null) {
      mapView.dispose();
    }
  }

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

    Application.launch(args);
  }

}