Picture marker symbol

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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.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Symbology;
using Esri.ArcGISRuntime.UI;
using System;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using System.Windows;

namespace ArcGIS.WPF.Samples.RenderPictureMarkers
{
    [ArcGIS.Samples.Shared.Attributes.Sample(
        name: "Picture marker symbol",
        category: "Symbology",
        description: "Use pictures for markers.",
        instructions: "When launched, this sample displays a map with picture marker symbols. Pan and zoom to explore the map.",
        tags: new[] { "graphics", "marker", "picture", "symbol", "visualization" })]
    [ArcGIS.Samples.Shared.Attributes.EmbeddedResource(@"PictureMarkerSymbols\pin_star_blue.png")]
    public partial class RenderPictureMarkers
    {
        public RenderPictureMarkers()
        {
            InitializeComponent();

            // Create the UI, setup the control references and execute initialization
            _ = Initialize();
        }

        private async Task Initialize()
        {
            // Create new Map with basemap
            Map myMap = new Map(BasemapStyle.ArcGISTopographic);

            // Create and set initial map area
            Envelope initialLocation = new Envelope(
                -229835, 6550763, -222560, 6552021,
                SpatialReferences.WebMercator);
            myMap.InitialViewpoint = new Viewpoint(initialLocation);

            // Assign the map to the MapView
            MyMapView.Map = myMap;

            // Create overlay to where graphics are shown
            GraphicsOverlay overlay = new GraphicsOverlay();

            // Add created overlay to the MapView
            MyMapView.GraphicsOverlays.Add(overlay);

            // Add graphics using different source types
            CreatePictureMarkerSymbolFromUrl(overlay);
            try
            {
                await CreatePictureMarkerSymbolFromResources(overlay);
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString(), "Error");
            }
        }

        private void CreatePictureMarkerSymbolFromUrl(GraphicsOverlay overlay)
        {
            // Create uri to the used image
            Uri symbolUri = new Uri(
                "https://static.arcgis.com/images/Symbols/OutdoorRecreation/Camping.png");

            // Create new symbol using asynchronous factory method from uri.
            PictureMarkerSymbol campsiteSymbol = new PictureMarkerSymbol(symbolUri)
            {
                Width = 40,
                Height = 40
            };

            // Create location for the campsite
            MapPoint campsitePoint = new MapPoint(-223560, 6552021, SpatialReferences.WebMercator);

            // Create graphic with the location and symbol
            Graphic campsiteGraphic = new Graphic(campsitePoint, campsiteSymbol);

            // Add graphic to the graphics overlay
            overlay.Graphics.Add(campsiteGraphic);
        }

        private async Task CreatePictureMarkerSymbolFromResources(GraphicsOverlay overlay)
        {
            // Hold a reference to the picture marker symbol
            PictureMarkerSymbol pinSymbol;

            // Get current assembly that contains the image
            Assembly currentAssembly = Assembly.GetExecutingAssembly();

            // Get the resource name of the blue pin image
            string resourceStreamName = this.GetType().Assembly.GetManifestResourceNames().Single(str => str.EndsWith("pin_star_blue.png"));

            // Load the blue pin resource stream
            using (Stream resourceStream = this.GetType().Assembly.
                       GetManifestResourceStream(resourceStreamName))
            {
                // Create new symbol using asynchronous factory method from stream
                pinSymbol = await PictureMarkerSymbol.CreateAsync(resourceStream);
                pinSymbol.Width = 50;
                pinSymbol.Height = 50;
            }

            // Create location for the pint
            MapPoint pinPoint = new MapPoint(-226773, 6550477, SpatialReferences.WebMercator);

            // Create graphic with the location and symbol
            Graphic pinGraphic = new Graphic(pinPoint, pinSymbol);

            // Add graphic to the graphics overlay
            overlay.Graphics.Add(pinGraphic);
        }
    }
}