Show a callout with the latitude and longitude of user-tapped 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
Tap anywhere on the map. A callout showing the WGS84 coordinates for the tapped point will appear.
How it works
- Listen for 
mouseClickedsignal on the map view. - When the user taps, get the tapped location using the mouseEvent x and y coordinates, 
MapQuickView.screenToLocation(mouse.x, mouse.y). - Create a string to display the coordinates; note that latitude and longitude in WGS84 map to the Y and X coordinates.
 - Create a new callout definition using a title and the coordinate string.
 - Display the callout by setting the
locationproperty of theCalloutDataand callingshowCallout. 
Relevant API
- CalloutDefinition
 - GeometryEngine.project
 - MapView.onMouseClicked
 
Tags
balloon, bubble, callout, flyout, flyover, info window, popup, tap
Sample Code
ShowCallout.qml
// [WriteFile Name=ShowCallout, Category=DisplayInformation]
// [Legal]
// Copyright 2016 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.
// [Legal]
import QtQuick 2.6
import Esri.ArcGISExtras 1.1
import Esri.ArcGISRuntime 100.15
import Esri.ArcGISRuntime.Toolkit 100.15
Rectangle {
    clip: true
    width: 800
    height: 600
    property Point calloutLocation
    property real xCoor
    property real yCoor
    // Map view UI presentation at top
    MapView {
        id: mapView
        anchors.fill: parent
        clip: true
        Component.onCompleted: {
            // Set the focus on MapView to initially enable keyboard navigation
            forceActiveFocus();
        }
        Map {
            Basemap {
                initStyle: Enums.BasemapStyleArcGISTopographic
            }
            // initial Viewpoint
            ViewpointCenter {
                Point {
                    x: -1.2e7
                    y: 5e6
                    spatialReference: SpatialReference { wkid: 3857 }
                }
                targetScale: 1e7
            }
        }
        //! [show callout qml api snippet]
        // initialize Callout
        calloutData {
            imageUrl: "qrc:/Samples/DisplayInformation/ShowCallout/RedShinyPin.png"
            title: "Location"
            location: calloutLocation
            detail: "x: " + xCoor + " y: " + yCoor
        }
        Callout {
            id: callout
            calloutData: parent.calloutData
            leaderPosition: leaderPositionEnum.Automatic
        }
        //! [show callout qml api snippet]
        // display callout on mouseClicked
        onMouseClicked: {
            if (callout.calloutVisible)
                callout.dismiss()
            else
            {
                calloutLocation = mouse.mapPoint;
                xCoor = mouse.mapPoint.x.toFixed(2);
                yCoor = mouse.mapPoint.y.toFixed(2);
                callout.accessoryButtonHidden = true;
                callout.showCallout();
            }
        }
    }
}