set the minimum and maximum scale of a Map in esri - Java Geographic Information System

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Description

set the minimum and maximum scale of a Map in esri

Demo Code

/*/*from w  w  w. ja v  a2s.  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.map;

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;

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;

/**
 * This sample demonstrates how to set the minimum and maximum scale of a Map.
 * <p>
 * Setting the minimum and maximum scale for the Map can be useful in keeping
 * the user focused at a certain level of detail.
 * <h4>How it Works</h4>
 * 
 * Once a {@link Map} is created the {@link Map#setMinScale} and
 * {@link Map#setMaxScale} methods can restricted the height at which the Map
 * can be viewed.
 * <p>
 * The scale must be a positive number.
 */
public class MinMaxScale extends Application {

    private MapView mapView;

    @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("Minimum and Maximum Scale 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 set the minimum and maximum scale of a Map."
                        + "\nZoom in and out to check that the minimum and maximum scale has "
                        + "been set.");
        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 basemap streets
            Map map = new Map(Basemap.createStreets());

            // set the scale at which this layer can be viewed
            map.setMinScale(8000);
            map.setMaxScale(2000);

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

            // a point where the map view will focus and zoom to
            mapView.setViewpoint(new Viewpoint(new Point(-355453, 7548720,
                    SpatialReferences.getWebMercator()), 3000));

            // 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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