Open scene (portal item)

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// Copyright 2018 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 System;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Portal;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using UIKit;

namespace ArcGISRuntime.Samples.OpenScenePortalItem
{
    [Register("OpenScenePortalItem")]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Open scene (portal item)",
        category: "Scene",
        description: "Open a web scene from a portal item.",
        instructions: "When the sample opens, it will automatically display the scene from ArcGIS Online. Pan and zoom to explore the scene.",
        tags: new[] { "portal", "scene", "web scene" })]
    public class OpenScenePortalItem : UIViewController
    {
        // Hold references to UI controls.
        private SceneView _mySceneView;

        // Hold the ID of the portal item, which is a web scene.
        private const string ItemId = "31874da8a16d45bfbc1273422f772270";

        public OpenScenePortalItem()
        {
            Title = "Open scene (Portal item)";
        }

        private async void Initialize()
        {
            try
            {
                // Try to load the default portal, which will be ArcGIS Online.
                ArcGISPortal portal = await ArcGISPortal.CreateAsync();

                // Create the portal item.
                PortalItem websceneItem = await PortalItem.CreateAsync(portal, ItemId);

                // Create and show the scene.
                _mySceneView.Scene = new Scene(websceneItem);
            }
            catch (Exception e)
            {
                new UIAlertView("Error", e.ToString(), (IUIAlertViewDelegate) null, "OK", null).Show();
            }
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            Initialize();
        }

        public override void LoadView()
        {
            // Create the views.
            View = new UIView() { BackgroundColor = ApplicationTheme.BackgroundColor };
            _mySceneView = new SceneView();
            _mySceneView.TranslatesAutoresizingMaskIntoConstraints = false;

            // Add the views.
            View.AddSubviews(_mySceneView);

            // Lay out the views.
            NSLayoutConstraint.ActivateConstraints(new[]
            {
                _mySceneView.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor),
                _mySceneView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
                _mySceneView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
                _mySceneView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor)
            });
        }
    }
}