Map rotation

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// 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.

using Esri.ArcGISRuntime.Mapping;
using System.Windows;

namespace ArcGIS.WPF.Samples.MapRotation
{
    [ArcGIS.Samples.Shared.Attributes.Sample(
        name: "Map rotation",
        category: "MapView",
        description: "Rotate a map.",
        instructions: "Use the slider to rotate the map.",
        tags: new[] { "rotate", "rotation", "viewpoint" })]
    public partial class MapRotation
    {
        public MapRotation()
        {
            InitializeComponent();

            Initialize();
        }

        private void Initialize()
        {
            // Show a new map with a streets basemap.
            MyMapView.Map = new Map(BasemapStyle.ArcGISStreets);
        }

        private void MySlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            // Display the rotation value in the Label formatted nicely with degree symbol.
            MyLabel.Text = string.Format("{0:0}\u00b0", MySlider.Value);

            // Set the MapView rotation to that of the Slider.
            MyMapView.SetViewpointRotationAsync(e.NewValue);
        }
    }
}