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
- Create a
Map
object. - Set the map to a
MapView
object. - Use
setViewpointRotation
to indicate the rotation angle.
Relevant API
- Map
- MapView
Tags
rotate, rotation, viewpoint
Sample Code
// [WriteFile Name=MapRotation, Category=Maps]
// [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]
#ifdef PCH_BUILD
#include "pch.hpp"
#endif // PCH_BUILD
#include "MapRotation.h"
#include "Map.h"
#include "MapQuickView.h"
#include "Basemap.h"
#include "Viewpoint.h"
#include "Point.h"
#include "SpatialReference.h"
using namespace Esri::ArcGISRuntime;
MapRotation::MapRotation(QQuickItem* parent) :
QQuickItem(parent)
{
}
MapRotation::~MapRotation() = default;
void MapRotation::init()
{
qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
qmlRegisterType<MapRotation>("Esri.Samples", 1, 0, "MapRotationSample");
}
void MapRotation::componentComplete()
{
QQuickItem::componentComplete();
// find QML MapView component
m_mapView = findChild<MapQuickView*>("mapView");
// create a new basemap instance
Basemap* basemap = new Basemap(BasemapStyle::ArcGISStreets, this);
// create a new map instance and set the initial viewpoint
m_map = new Map(basemap, this);
Viewpoint initialViewpoint(Point(-11070722, 4658720, SpatialReference(102100)), 55151630);
m_map->setInitialViewpoint(initialViewpoint);
// set map on the map view
m_mapView->setMap(m_map);
}
void MapRotation::setMapViewRotation(double degrees)
{
m_mapView->setViewpointRotation(degrees);
}