Feature Layer Rendering Mode (Map)

This sample demonstrates how to use load settings to set preferred rendering mode for feature layers, specifically static or dynamic rendering modes.

Feature layer rendering modes

Code

// Copyright 2017 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 Android.App;
using Android.OS;
using Android.Views;
using Android.Widget;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using System;
using System.Threading.Tasks;

namespace ArcGISRuntimeXamarin.Samples.FeatureLayerRenderingModeMap
{
    [Activity]
    public class FeatureLayerRenderingModeMap : Activity
    {
        // Create variables to hold MapView instances  
        private MapView _myMapViewTop;
        private MapView _myMapViewBottom;

        // Viewpoint locations for map view to zoom in and out to.
        private Viewpoint _zoomOutPoint = new Viewpoint(new MapPoint(-118.37, 34.46, SpatialReferences.Wgs84), 650000, 0);
        private Viewpoint _zoomInPoint = new Viewpoint(new MapPoint(-118.45, 34.395, SpatialReferences.Wgs84), 50000, 90);

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            Title = "Feature Layer Rendering Mode (Map)";

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

        private void CreateLayout()
        { 
            // Show the layout in the app
            SetContentView(Resource.Layout.FeatureLayerRenderingModeMapLayout);

            // Create the MapViews
            _myMapViewTop = FindViewById<MapView>(Resource.Id.Top_MyMapView);
            _myMapViewBottom = FindViewById<MapView>(Resource.Id.Bottom_MyMapView);

            // Create the Zoom button
            Button zoomButton = FindViewById<Button>(Resource.Id.ZoomButton);

            // Set Zoom method to run on button click 
            zoomButton.Click += OnZoomClick;
        }

        private async void Initialize()
        {
            // Set the Map property of both MapViews
            _myMapViewTop.Map = new Map();
            _myMapViewBottom.Map = new Map();

            // Set the top map to render all features in static rendering mode
            _myMapViewTop.Map.LoadSettings.PreferredPointFeatureRenderingMode = FeatureRenderingMode.Static;
            _myMapViewTop.Map.LoadSettings.PreferredPolylineFeatureRenderingMode = FeatureRenderingMode.Static;
            _myMapViewTop.Map.LoadSettings.PreferredPolygonFeatureRenderingMode = FeatureRenderingMode.Static;

            // Set the bottom map to render all features in dynamic rendering mode
            _myMapViewBottom.Map.LoadSettings.PreferredPointFeatureRenderingMode = FeatureRenderingMode.Dynamic;
            _myMapViewBottom.Map.LoadSettings.PreferredPolylineFeatureRenderingMode = FeatureRenderingMode.Dynamic;
            _myMapViewBottom.Map.LoadSettings.PreferredPolygonFeatureRenderingMode = FeatureRenderingMode.Dynamic;

            // Create service feature table using a point, polyline, and polygon service.
            ServiceFeatureTable poinServiceFeatureTable = new ServiceFeatureTable(new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/0"));
            ServiceFeatureTable polylineServiceFeatureTable = new ServiceFeatureTable(new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/8"));
            ServiceFeatureTable polygonServiceFeatureTable = new ServiceFeatureTable(new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/9"));

            // Create feature layer from service feature tables.
            FeatureLayer pointFeatureLayer = new FeatureLayer(poinServiceFeatureTable);
            FeatureLayer polylineFeatureLayer = new FeatureLayer(polylineServiceFeatureTable);
            FeatureLayer polygonFeatureLayer = new FeatureLayer(polygonServiceFeatureTable);

            // Add each layer to top map.
            _myMapViewTop.Map.OperationalLayers.Add(pointFeatureLayer.Clone());
            _myMapViewTop.Map.OperationalLayers.Add(polylineFeatureLayer.Clone());
            _myMapViewTop.Map.OperationalLayers.Add(polygonFeatureLayer.Clone());

            // Add each layer to top map.
            _myMapViewBottom.Map.OperationalLayers.Add(pointFeatureLayer);
            _myMapViewBottom.Map.OperationalLayers.Add(polylineFeatureLayer);
            _myMapViewBottom.Map.OperationalLayers.Add(polygonFeatureLayer);

            // Set the view point of both MapViews.
            _myMapViewTop.SetViewpoint(_zoomOutPoint);
            _myMapViewBottom.SetViewpoint(_zoomOutPoint);
        }

        private async void OnZoomClick(object sender, EventArgs e)
        {
            // Initiate task to zoom both map views in.  
            Task t1 = _myMapViewTop.SetViewpointAsync(_zoomInPoint, TimeSpan.FromSeconds(5));
            Task t2 = _myMapViewBottom.SetViewpointAsync(_zoomInPoint, TimeSpan.FromSeconds(5));
            await Task.WhenAll(t1, t2);

            // Delay start of next set of zoom tasks.
            await Task.Delay(2000);

            // Initiate task to zoom both map views out. 
            Task t3 = _myMapViewTop.SetViewpointAsync(_zoomOutPoint, TimeSpan.FromSeconds(5));
            Task t4 = _myMapViewBottom.SetViewpointAsync(_zoomOutPoint, TimeSpan.FromSeconds(5));
            await Task.WhenAll(t3, t4);

        }
    }
}


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