Create and save KML file

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
/*
 * 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.create_and_save_kml_file;

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.Geometry;
import com.esri.arcgisruntime.geometry.GeometryEngine;
import com.esri.arcgisruntime.geometry.GeometryType;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.layers.KmlLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.mapping.view.geometryeditor.GeometryEditor;
import com.esri.arcgisruntime.ogc.kml.KmlAltitudeMode;
import com.esri.arcgisruntime.ogc.kml.KmlDataset;
import com.esri.arcgisruntime.ogc.kml.KmlDocument;
import com.esri.arcgisruntime.ogc.kml.KmlGeometry;
import com.esri.arcgisruntime.ogc.kml.KmlIcon;
import com.esri.arcgisruntime.ogc.kml.KmlIconStyle;
import com.esri.arcgisruntime.ogc.kml.KmlLineStyle;
import com.esri.arcgisruntime.ogc.kml.KmlPlacemark;
import com.esri.arcgisruntime.ogc.kml.KmlPolygonStyle;
import com.esri.arcgisruntime.ogc.kml.KmlStyle;

import javafx.fxml.FXML;
import javafx.scene.control.Alert;
import javafx.scene.control.ColorPicker;
import javafx.scene.control.ComboBox;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.FileChooser;

import java.io.File;
import java.util.Arrays;
import java.util.List;

public class CreateAndSaveKMLFileController {

  @FXML private StackPane stackPane;
  @FXML private ColorPicker colorPicker;
  @FXML private ComboBox<String> pointSymbolComboBox;
  @FXML private ComboBox<GeometryType> geometryTypeComboBox;
  @FXML private MapView mapView;

  private ArcGISMap map; // keep loadable in scope to avoid garbage collection
  private KmlDocument kmlDocument;
  private GeometryEditor geometryEditor;
  private FileChooser fileChooser;

  @FXML
  public void initialize() {

    // 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 map and add it to the map view
    map = new ArcGISMap(BasemapStyle.ARCGIS_DARK_GRAY);
    mapView.setMap(map);

    // create a geometry editor and add it to the map view
    geometryEditor = new GeometryEditor();
    mapView.setGeometryEditor(geometryEditor);

    // add geometry options for KML placemarks
    geometryTypeComboBox.getItems().addAll(GeometryType.POINT, GeometryType.POLYLINE, GeometryType.POLYGON);

    // restart the geometry editor whenever the selected creation mode changes
    geometryTypeComboBox.getSelectionModel().selectedItemProperty().addListener(o -> createGeometry());

    // start with POINT selected
    map.addDoneLoadingListener(() -> geometryTypeComboBox.getSelectionModel().select(0));

    // show style controls relevant to the selected geometry type
    colorPicker.visibleProperty().bind(geometryTypeComboBox.getSelectionModel().selectedItemProperty().isNotEqualTo(GeometryType.POINT));
    pointSymbolComboBox.visibleProperty().bind(geometryTypeComboBox.getSelectionModel().selectedItemProperty().isEqualTo(GeometryType.POINT));

    // set the images for the icon selection combo box
    List<String> iconLinks = Arrays.asList(
            null, // for the default symbol
            "https://static.arcgis.com/images/Symbols/Shapes/BlueCircleLargeB.png",
            "https://static.arcgis.com/images/Symbols/Shapes/BlueDiamondLargeB.png",
            "https://static.arcgis.com/images/Symbols/Shapes/BluePin1LargeB.png",
            "https://static.arcgis.com/images/Symbols/Shapes/BluePin2LargeB.png",
            "https://static.arcgis.com/images/Symbols/Shapes/BlueSquareLargeB.png",
            "https://static.arcgis.com/images/Symbols/Shapes/BlueStarLargeB.png");
    pointSymbolComboBox.getItems().addAll(iconLinks);
    pointSymbolComboBox.setCellFactory(comboBox -> new ImageURLListCell());
    pointSymbolComboBox.setButtonCell(new ImageURLListCell());
    pointSymbolComboBox.getSelectionModel().select(0);

    // create a KML layer from a blank KML document and add it to the map
    kmlDocument = new KmlDocument();
    var kmlDataset = new KmlDataset(kmlDocument);
    var kmlLayer = new KmlLayer(kmlDataset);
    map.getOperationalLayers().add(kmlLayer);

    // create a file chooser to get a path for saving the KMZ file
    fileChooser = new FileChooser();
    FileChooser.ExtensionFilter kmzFilter = new FileChooser.ExtensionFilter("KMZ files (*.kmz)", "*.kmz");
    fileChooser.getExtensionFilters().add(kmzFilter);
    fileChooser.setTitle("Save KMZ file:");
  }

  /**
   * Starts the geometry editor based on the selected geometry type.
   */
  @FXML
  private void createGeometry() {
    // stop the geometry editor
    geometryEditor.stop();

    // request focus on stack pane to receive key events
    stackPane.requestFocus();

    // start the geometry editor with the selected creation mode
    geometryEditor.start(geometryTypeComboBox.getSelectionModel().getSelectedItem());
  }

  /**
   * Discard or commit the current geometry to a KML placemark if ESCAPE or ENTER are pressed while editing the geometry.
   *
   * @param keyEvent the key event
   */
  @FXML
  private void handleKeyReleased(KeyEvent keyEvent) {
    if (keyEvent.getCode() == KeyCode.ESCAPE) {
      // clear the current geometry and start a new geometry editing
      createGeometry();
    } else if (keyEvent.getCode() == KeyCode.ENTER) {
      // project the created geometry to WGS84 to comply with the KML standard
      Geometry geometry = geometryEditor.getGeometry();
      Geometry projectedGeometry = GeometryEngine.project(geometry, SpatialReferences.getWgs84());

      // create a new KML placemark
      var kmlGeometry = new KmlGeometry(projectedGeometry, KmlAltitudeMode.CLAMP_TO_GROUND);
      var currentKmlPlacemark = new KmlPlacemark(kmlGeometry);

      // update the style of the current KML placemark
      var kmlStyle = new KmlStyle();
      currentKmlPlacemark.setStyle(kmlStyle);

      // set the selected style for the placemark
      switch (geometry.getGeometryType()) {
        case POINT:
          if (pointSymbolComboBox.getSelectionModel().getSelectedItem() != null) {
            String iconURI = pointSymbolComboBox.getSelectionModel().getSelectedItem();
            var kmlIcon = new KmlIcon(iconURI);
            var kmlIconStyle = new KmlIconStyle(kmlIcon, 1);
            kmlStyle.setIconStyle(kmlIconStyle);
          }
          break;
        case POLYLINE:
          Color polylineColor = colorPicker.getValue();
          if (polylineColor != null) {
            var kmlLineStyle = new KmlLineStyle(polylineColor, 8);
            kmlStyle.setLineStyle(kmlLineStyle);
          }
          break;
        case POLYGON:
          Color polygonColor = colorPicker.getValue();
          if (polygonColor != null) {
            var kmlPolygonStyle = new KmlPolygonStyle(polygonColor);
            kmlPolygonStyle.setFilled(true);
            kmlPolygonStyle.setOutlined(false);
            kmlStyle.setPolygonStyle(kmlPolygonStyle);
          }
          break;
      }

      // add the placemark to the kml document
      kmlDocument.getChildNodes().add(currentKmlPlacemark);

      // start a new geometry editing
      createGeometry();
    }
  }

  /**
   * Open the file chooser to save the KML Document to a KMZ file.
   */
  @FXML
  private void handleSaveAction() {

    // get a path from the file chooser
    File kmzFile = fileChooser.showSaveDialog(mapView.getScene().getWindow());
    if (kmzFile != null) {
      // save the KML document to the file
      kmlDocument.saveAsAsync(kmzFile.getPath()).addDoneListener(() ->
          new Alert(Alert.AlertType.INFORMATION, "KMZ file saved.").show()
      );
    }
  }

  /**
   * Stops and releases all resources used in application.
   */
  void terminate() {

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