Java examples for Geographic Information System:Esri
limit what Features are displayed on a Map using esri
/*/* ww w .j av a2 s . c o m*/ * Copyright 2015 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.sampleviewer.samples.featurelayers; import com.esri.arcgisruntime.datasource.Feature; import com.esri.arcgisruntime.datasource.arcgis.ServiceFeatureTable; import com.esri.arcgisruntime.geometry.Point; import com.esri.arcgisruntime.geometry.SpatialReferences; import com.esri.arcgisruntime.layers.FeatureLayer; import com.esri.arcgisruntime.mapping.Basemap; import com.esri.arcgisruntime.mapping.Map; import com.esri.arcgisruntime.mapping.view.MapView; import javafx.application.Application; import javafx.application.Platform; import javafx.geometry.Insets; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.control.TextArea; import javafx.scene.layout.StackPane; import javafx.scene.layout.VBox; import javafx.stage.Stage; /** * This sample demonstrates how to limit what Features are displayed on a Map. * <h4>How it Works</h4> * * First a {@link FeatureLayer} is created from a {@link ServiceFeatureTable}. * Next, {@link FeatureLayer#setDefinitionExpression} method is called to set a * SQL where clause that filters the {@link Feature}s to be displayed. */ public class FeatureLayerDefinitionExpression extends Application { private MapView mapView; private FeatureLayer featureLayer; private final static String FEATURE_SERVICE_URL = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/SF311/FeatureServer/0"; @Override public void start(Stage stage) throws Exception { // create stack pane and application scene StackPane stackPane = new StackPane(); Scene scene = new Scene(stackPane); scene.getStylesheets().add(getClass() .getResource("../resources/SamplesTheme.css").toExternalForm()); // set title, size, and add scene to stage stage.setTitle("Feature Layer Definition Expression Sample"); stage.setWidth(800); stage.setHeight(700); stage.setScene(scene); stage.show(); // create a control panel VBox vBoxControl = new VBox(6); vBoxControl.setMaxSize(240, 260); vBoxControl.getStyleClass().add("panel-region"); // create sample description Label descriptionLabel = new Label("Sample Description:"); descriptionLabel.getStyleClass().add("panel-label"); TextArea description = new TextArea( "This sample shows how to limit what Features are displayed on a Map.\n" + "Click Apply to filter by tree Features. Click Reset to remove the filter."); description.setWrapText(true); description.autosize(); description.setEditable(false); // create buttons to apply/reset definition expression Button applyButton = new Button("Apply"); Button resetButton = new Button("Reset"); applyButton.setMaxWidth(Double.MAX_VALUE); resetButton.setMaxWidth(Double.MAX_VALUE); applyButton.setDisable(true); resetButton.setDisable(true); // set the definition expression applyButton.setOnAction(e -> { featureLayer .setDefinitionExpression("req_Type = 'Tree Maintenance or Damage'"); }); // reset the definition expression resetButton.setOnAction(e -> { featureLayer.setDefinitionExpression(""); }); // add label, sample description and buttons to the control panel vBoxControl.getChildren().addAll(descriptionLabel, description, applyButton, resetButton); try { // create service feature table final ServiceFeatureTable featureTable = new ServiceFeatureTable(FEATURE_SERVICE_URL); // create feature layer from service feature table featureLayer = new FeatureLayer(featureTable); // enable buttons when done loading featureLayer.addDoneLoadingListener(() -> { applyButton.setDisable(false); resetButton.setDisable(false); }); // create a map using the basemap topographic final Map map = new Map(Basemap.createTopographic()); // add the feature layer to the map map.getOperationalLayers().add(featureLayer); // create a view for this map and set map to it mapView = new MapView(); mapView.setMap(map); // starting location for sample Point startPoint = new Point(-13630845, 4544861, SpatialReferences.getWebMercator()); // set the viewpoint for the map view mapView.setViewpointCenterWithScaleAsync(startPoint, 150000); // add the map view and control panel to stack pane stackPane.getChildren().addAll(mapView, vBoxControl); StackPane.setAlignment(vBoxControl, Pos.TOP_LEFT); StackPane.setMargin(vBoxControl, new Insets(10, 0, 0, 10)); } catch (Exception e) { // on any error, display the stack trace e.printStackTrace(); } } /** * Stops and releases all resources used in application. * * @throws Exception if security manager doesn't allow JVM to exit with * current status */ @Override public void stop() throws Exception { if (mapView != null) { mapView.dispose(); } Platform.exit(); System.exit(0); } /** * Opens and runs application. * * @param args arguments passed to this application */ public static void main(String[] args) { Application.launch(args); } }