Open map (URL)

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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.open_map_url;

import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.ListCell;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.util.StringConverter;

import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.portal.Portal;
import com.esri.arcgisruntime.portal.PortalItem;

public class OpenMapURLSample extends Application {

  private MapView mapView;
  private List<ArcGISMap> webMaps; // keep loadable in scope to avoid garbage collection

  private static final String[] portalItemIDs = new String[] {
      "92ad152b9da94dee89b9e387dfe21acd", "064f2e898b094a17b84e4a4cd5e5f549"
  };

  @Override
  public void start(Stage stage) {

    // 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("Open Map URL Sample");
    stage.setWidth(800);
    stage.setHeight(700);
    stage.setScene(scene);
    stage.show();

    // create a map view
    mapView = new MapView();

    // create a combo box to list maps
    ComboBox<ArcGISMap> webMapComboBox = new ComboBox<>();

    // create maps using portal item IDs
    Portal portal = new Portal("http://www.arcgis.com/");
    webMaps = Stream.of(portalItemIDs)
        .map(id -> new PortalItem(portal, id))
        .map(ArcGISMap::new)
        .collect(Collectors.toList());

    // load maps and add to combo box
    webMaps.forEach(map -> {
      map.getItem().loadAsync();
      map.getItem().addDoneLoadingListener(() -> webMapComboBox.getItems().add(map));
    });

    // listener to switch the map when the selected map changes
    webMapComboBox.getSelectionModel().selectedItemProperty().addListener(e -> {
      ArcGISMap webMap = webMapComboBox.getSelectionModel().getSelectedItem();
      mapView.setMap(webMap);
    });

    // show the name of the map in the combo box
    webMapComboBox.setConverter(new StringConverter<>() {

      @Override
      public String toString(ArcGISMap map) {
        return map != null ? map.getItem().getTitle() : "";
      }

      @Override
      public ArcGISMap fromString(String string) {
        return null; //not needed
      }
    });

    webMapComboBox.setCellFactory(comboBox -> new ListCell<>() {

      @Override
      protected void updateItem(ArcGISMap map, boolean empty) {
        super.updateItem(map, empty);
        setText(empty ? "" : map.getItem().getTitle());
      }
    });

    // select the web map loaded first
    webMaps.get(0).getItem().addDoneLoadingListener(() -> webMapComboBox.getSelectionModel().select(0));

    // add the map view and flow panel to stack pane
    stackPane.getChildren().addAll(mapView, webMapComboBox);
    StackPane.setAlignment(webMapComboBox, Pos.TOP_LEFT);
    StackPane.setMargin(webMapComboBox, new Insets(10, 0, 0, 10));
  }

  /**
   * 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);
  }

}