start a Map application with a defined initial Viewpoint in esri - Java Geographic Information System

Java examples for Geographic Information System:Esri

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Description

start a Map application with a defined initial Viewpoint in esri

Demo Code

/* Copyright 2015 Esri./*from   w ww .  ja  v  a 2s  .  c o  m*/
     
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.map;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Map;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.mapping.view.Viewpoint;

/**
 * This sample demonstrates how to start a Map application with a defined
 * initial Viewpoint.
 * <p>
 * {@link Envelope} represents a rectangle area which describes a location on
 * the {@link Map}.
 * <h4>How it Works</h4>
 * 
 * In this sample a {@link Viewpoint} is created using a Envelope. Once the Map
 * is created, the {@link Map#setInitialViewpoint} method will set the starting
 * location of a Map when the application launches. Then the Map is set to the
 * {@link MapView} for it's layers to be displayed.
 */
public class MapInitialExtent extends Application {

    private MapView mapView;

    private static final String SAMPLES_THEME_PATH = "../resources/SamplesTheme.css";

    @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(SAMPLES_THEME_PATH)
                        .toExternalForm());

        // set title, size, and add scene to stage
        stage.setTitle("Map Initial Extent Sample");
        stage.setWidth(800);
        stage.setHeight(700);
        stage.setScene(scene);
        stage.show();

        // create a control panel
        VBox vBoxControl = new VBox(6);
        vBoxControl.setMaxSize(250, 190);
        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 start a Map"
                        + " with a defined initial Viewpoint.");
        description.setWrapText(true);
        description.autosize();
        description.setEditable(false);

        // add label and sample description to the control panel
        vBoxControl.getChildren().addAll(descriptionLabel, description);
        try {

            // create a map with the basemap
            final Map map = new Map(Basemap.createTopographic());

            // create an initial extent envelope
            Point leftPoint = new Point(-12211308.778729, 4645116.003309,
                    SpatialReferences.getWebMercator());
            Point rightPoint = new Point(-12208257.879667, 4650542.535773,
                    SpatialReferences.getWebMercator());
            Envelope initialExtent = new Envelope(leftPoint, rightPoint);

            // create a viewpoint from envelope
            Viewpoint viewPoint = new Viewpoint(initialExtent);

            // set initial map extent
            map.setInitialViewpoint(viewPoint);

            // create a view and set map to it
            mapView = new MapView();
            mapView.setMap(map);

            // 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);
    }

}

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