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ArcGIS Runtime SDK for Qt

Map rotation

Sample Viewer View Sample on GitHub

Rotate a map.

Use case

A user may wish to view the map in an orientation other than north-facing.

How to use the sample

Use the slider to rotate the map.

How it works

  1. Instantiate a Map object.
  2. Set the map to a MapView object.
  3. Use mapView.setViewpointRotation(angle) to indicate the rotation angle.

Relevant API

  • Map
  • MapView

Tags

rotate, rotation, viewpoint

Sample Code

import QtQuick 2.6
import QtQuick.Controls 2.2
import Esri.ArcGISRuntime 100.9

Rectangle {
    width: 800
    height: 600    

    // Map view UI presentation at top
    MapView {
        id: mv

        anchors.fill: parent

        Map {
            BasemapStreets {}
            initialViewpoint: vc
        }

        ViewpointCenter {
            id: vc
            center: Point {
                x: -11070722
                y: 4658720
                spatialReference: SpatialReference {
                    wkid: 102100
                }
            }
            targetScale: 55151630
        }

        // Slider UI presentation at bottom
        Rectangle {
            anchors {
                bottom: mv.attributionTop
                horizontalCenter: parent.horizontalCenter
            }

            width: childrenRect.width
            height: childrenRect.height
            radius: 10
            opacity: 0.8

            // sliderCombo: A slider and text for its value
            Row {
                id: sliderCombo
                spacing: 5

                Slider {
                    id: slider1
                    opacity: 0.7
                    anchors {
                        verticalCenter: parent.verticalCenter
                    }
                    // Slider controls degrees of rotation
                    from: 0.0
                    to: 360.0
                    onPressedChanged: {
                        // Call C++ invokable function to change the rotation
                        // of the map view
                        mv.setViewpointRotation(value);
                    }
                }

                Text {
                    anchors {
                        verticalCenter: parent.verticalCenter
                        margins: 5
                    }
                    horizontalAlignment: TextInput.AlignHCenter
                    font.pixelSize: 20
                    text: slider1.value.toPrecision(3);
                }
            }
        }
    }
}