Filter by definition expression or display filter

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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
/*
 * Copyright 2022 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.filter_by_definition_expression_or_display_filter;

import java.util.Collections;
import java.util.concurrent.ExecutionException;

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.control.Label;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Paint;
import javafx.stage.Stage;

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.data.QueryParameters;
import com.esri.arcgisruntime.data.ServiceFeatureTable;
import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.layers.DisplayFilter;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.layers.ManualDisplayFilterDefinition;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.DrawStatus;
import com.esri.arcgisruntime.mapping.view.MapView;

public class FilterByDefinitionExpressionOrDisplayFilterSample extends Application {

  private Button applyExpressionButton;
  private Button applyFilterButton;
  private Button resetButton;
  private Label featureCountLabel;

  private MapView mapView;
  private FeatureLayer featureLayer; // keep loadable in scope to avoid garbage collection

  private static final String FEATURE_SERVICE_URL =
    "https://services2.arcgis.com/ZQgQTuoyBrtmoGdP/arcgis/rest/services/SF_311_Incidents/FeatureServer/0";

  @Override
  public void start(Stage stage) {

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

      // set title, size, and add scene to stage
      stage.setTitle("Filter by Definition Expression or Display Filter Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      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 map with the topographic basemap style
      ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);
      // create a map view and set the map to it
      mapView = new MapView();
      mapView.setMap(map);
      // disable interaction with the map view to avoid navigating away from the data
      mapView.setDisable(true);

      // create feature layer from service feature table
      featureLayer = new FeatureLayer(new ServiceFeatureTable(FEATURE_SERVICE_URL));
      // add the feature layer to the map's operational layers
      map.getOperationalLayers().add(featureLayer);

      // starting location for sample
      Point startPoint = new Point(-122.45044007080793, 37.775915492745874, SpatialReferences.getWgs84());
      // set the viewpoint for the map view
      mapView.setViewpointCenterAsync(startPoint, 20000);

      // set up user interface
      VBox vBox = controlsVBox();

      // add a progress indicator and display it when drawing is in progress
      var progressIndicator = new ProgressIndicator();
      progressIndicator.visibleProperty().bind(mapView.drawStatusProperty().isEqualTo(DrawStatus.IN_PROGRESS));

      // create a new display filter with a name and where clause
      var displayFilter = new DisplayFilter("Damaged Trees", "req_type LIKE '%Tree Maintenance%'");
      var manualDisplayFilterDefinition = new ManualDisplayFilterDefinition(displayFilter,
        Collections.singletonList(displayFilter));

      // reset any existing definition expression on the feature layer, and set a display filter definition to it
      applyFilterButton.setOnAction(e -> {
          // reset the definition expression on the feature layer
          featureLayer.setDefinitionExpression("");
          // set the display filter definition to the feature layer
          featureLayer.setDisplayFilterDefinition(manualDisplayFilterDefinition);
        }
      );

      // reset any existing display filter definition on the feature layer, and set a definition expression to it
      applyExpressionButton.setOnAction(e -> {
        // reset the display filter definition
        featureLayer.setDisplayFilterDefinition(null);
        // set the definition expression to the feature layer
        featureLayer.setDefinitionExpression("req_Type = 'Tree Maintenance or Damage'");
      });

      // reset the definition expression and display filter definition on the feature layer
      resetButton.setOnAction(e -> {
        // reset the display filter definition
        featureLayer.setDisplayFilterDefinition(null);
        // reset the definition expression on the feature layer
        featureLayer.setDefinitionExpression("");
      });

      // check that the feature layer has loaded, then add a listener to the mapview to count
      // the features visible in the viewpoint extent every time the map is redrawn
      featureLayer.addDoneLoadingListener(() -> {
        if (featureLayer.getLoadStatus() == LoadStatus.LOADED) {
          mapView.drawStatusProperty().addListener((observable, oldValue, newValue) -> {
            if (newValue == DrawStatus.IN_PROGRESS) {
              // set the count label text
              featureCountLabel.setText("updating..");
            } else {
              // get the map view's current view point, create query parameters and set the view point to it
              Envelope viewPointExtent =
                mapView.getCurrentViewpoint(Viewpoint.Type.BOUNDING_GEOMETRY).getTargetGeometry().getExtent();
              QueryParameters queryParameters = new QueryParameters();
              queryParameters.setGeometry(viewPointExtent);

              // update the UI with the count of features in the extent
              if (!viewPointExtent.isEmpty()) {
                var queryFeatures = featureLayer.getFeatureTable().queryFeatureCountAsync(queryParameters);
                // once the query feature count is done, update the label to show the total incidents counted
                queryFeatures.addDoneListener(() -> {
                  Long totalIncidentReported;
                  try {
                    totalIncidentReported = queryFeatures.get();
                    featureCountLabel.setText(totalIncidentReported.toString());
                  } catch (InterruptedException | ExecutionException e) {
                    e.printStackTrace();
                  }
                });
              }
            }
          });
        } else {
          new Alert(Alert.AlertType.ERROR, "Feature layer failed to load").show();
        }
      });

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

    } catch (Exception e) {
      // on any error, display the stack trace
      e.printStackTrace();
    }
  }

  /**
   * Creates a UI with three buttons and a label.
   * @return a vBox populated with buttons and labels
   */
  private VBox controlsVBox() {

    Label label = new Label("Current feature count: ");
    featureCountLabel = new Label("loading...");

    applyExpressionButton = new Button("Apply definition expression");
    applyFilterButton = new Button("Apply display filter");
    resetButton = new Button("Reset");

    var buttonVBox = new VBox(5);
    buttonVBox.setMinWidth(200);
    buttonVBox.getChildren().addAll(applyExpressionButton, applyFilterButton, resetButton);

    applyExpressionButton.prefWidthProperty().bind(buttonVBox.widthProperty());
    applyFilterButton.prefWidthProperty().bind(buttonVBox.widthProperty());
    resetButton.prefWidthProperty().bind(buttonVBox.widthProperty());

    VBox controlsVBox = new VBox(10);
    controlsVBox.setBackground(new Background(new BackgroundFill(Paint.valueOf("rgba(0,0,0,0.5)"), CornerRadii.EMPTY,
      Insets.EMPTY)));
    controlsVBox.setPadding(new Insets(10.0));
    controlsVBox.setMaxSize(200, 100);
    controlsVBox.getStyleClass().add("panel-region");
    var hBox = new HBox();
    hBox.getChildren().addAll(label, featureCountLabel);
    controlsVBox.getChildren().addAll(hBox, buttonVBox);

    return controlsVBox;
  }

  /**
   * 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);
  }

}