Show a callout with the latitude and longitude of user-clicked points.
Use case
Callouts are used to display temporary detail content on a map. You can display text and arbitrary UI controls in callouts.
How to use the sample
Click anywhere on the map. A callout showing the WGS84 coordinates for the clicked point will appear.
How it works
Use MapView.setOnMouseClicked() to create a click event handler.
Capture the click event and use its x and y coordinates to create a new Point2D representing the screen point.
Get the screen point's location on the map using MapView.screenToLocation(Point2D).
Get the MapView's callout.
Set the title and detail of the callout to display the map point's coordinates.
Display the callout at the map point callout.showCalloutAt(mapPoint).
Relevant API
Callout
MapView
Point
Tags
balloon, bubble, callout, click, flyout, flyover, info window, popup
Sample Code
ShowCalloutSample.java
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/*
* Copyright 2017 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.show_callout;
import javafx.application.Application;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.input.MouseButton;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.GeometryEngine;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.view.Callout;
import com.esri.arcgisruntime.mapping.view.MapView;
publicclassShowCalloutSampleextendsApplication{
private MapView mapView;
@Overridepublicvoidstart(Stage stage){
try {
// create stack pane and application scene StackPane stackPane = new StackPane();
Scene scene = new Scene(stackPane);
// set title, size, and add scene to stage stage.setTitle("Show Callout 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 streets relief basemap style ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_STREETS_RELIEF);
// create a map view and set the map to it mapView = new MapView();
mapView.setMap(map);
// get the map view's callout Callout callout = mapView.getCallout();
// click event to display the callout mapView.setOnMouseClicked(e -> {
// check that the primary mouse button was clicked and user is not panningif (e.getButton() == MouseButton.PRIMARY && e.isStillSincePress()) {
// create a point from where the user clicked Point2D point = new Point2D(e.getX(), e.getY());
// create a map point from a point Point mapPoint = mapView.screenToLocation(point);
// project user-tapped map point location Point projectedPoint = (Point)GeometryEngine.project(mapPoint, SpatialReferences.getWgs84());
// set the callout's details callout.setTitle("Location");
callout.setDetail(String.format("Lat: %.3f, Long: %.3f", projectedPoint.getY(), projectedPoint.getX()));
// show the callout where the user clicked callout.showCalloutAt(mapPoint);
// dismiss the callout on secondary click } elseif (e.getButton() == MouseButton.SECONDARY && e.isStillSincePress()) {
callout.dismiss();
}
});
// add map view and control panel to stack pane stackPane.getChildren().addAll(mapView);
} catch (Exception e) {
// on any error, print the stack trace e.printStackTrace();
}
}
/**
* Stops and releases all resources used in application.
*/@Overridepublicvoidstop(){
// release resources when the application closesif (mapView != null) {
mapView.dispose();
}
}
/**
* Opens and runs application.
*
* @param args arguments passed to this application
*/publicstaticvoidmain(String[] args){
Application.launch(args);
}
}