Show callout

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Sample viewer app

Show a callout with the latitude and longitude of user-tapped points.

screenshot

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

  1. Listen for mouseClicked signal on the map view.
  2. When the user taps, get the tapped location using the mouseEvent x and y coordinates, MapQuickView::screenToLocation(mouseEvent.x(), mouseEvent.y()).
  3. Create a string to display the coordinates; note that latitude and longitude in WGS84 map to the Y and X coordinates.
  4. Create a new callout definition using a title and the coordinate string.
  5. Display the callout by calling setVisible and setLocation on the CalloutData.

Relevant API

  • CalloutDefinition
  • GeometryEngine::project
  • GeoViewTappedEventArgs
  • MapView::geoViewTapped
  • MapView::showCalloutAt

Tags

balloon, bubble, callout, flyout, flyover, info window, popup, tap

Sample Code

ShowCallout.qmlShowCallout.cppShowCallout.h
                                           
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// [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.Samples 1.0
import Esri.ArcGISRuntime.Toolkit 100.11

ShowCalloutSample {
    id: showCalloutSample
    clip: true
    width: 800
    height: 600

    // add a mapView component
    MapView {
        id: mapView
        anchors.fill: parent
        objectName: "mapView"
        clip: true

        //! [set callout data]
        Callout {
            id: callout
            calloutData: mapView.calloutData // bind to the property that is exposed
            accessoryButtonHidden: true
            leaderPosition: leaderPositionEnum.Automatic
        }
        //! [set callout data]
    }
}

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