Open mobile scene package

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// Copyright 2019 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 ArcGISRuntime;
using ArcGISRuntime.Samples.Managers;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using System;
using System.Diagnostics;
using System.Linq;
using UIKit;

namespace ArcGISRuntimeXamarin.Samples.OpenMobileScenePackage
{
    [Register("OpenMobileScenePackage")]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Open mobile scene package",
        category: "Scene",
        description: "Opens and displays a scene from a Mobile Scene Package (.mspk).",
        instructions: "When the sample opens, it will automatically display the Scene in the Mobile Map Package.",
        tags: new[] { "offline", "scene" })]
    [ArcGISRuntime.Samples.Shared.Attributes.OfflineData("7dd2f97bb007466ea939160d0de96a9d")]
    public class OpenMobileScenePackage : UIViewController
    {
        // Hold references to UI controls.
        private SceneView _mySceneView;

        public OpenMobileScenePackage()
        {
            Title = "Open mobile scene package";
        }

        private async void Initialize()
        {
            // Get the path to the scene package.
            string scenePath = DataManager.GetDataFolder("7dd2f97bb007466ea939160d0de96a9d", "philadelphia.mspk");

            try
            {
                // Open the package.
                MobileScenePackage package = await MobileScenePackage.OpenAsync(scenePath);

                // Load the package.
                await package.LoadAsync();

                // Show the first scene.
                _mySceneView.Scene = package.Scenes.First();
            }
            catch (Exception e)
            {
                new UIAlertView("Couldn't open scene", e.Message, (IUIAlertViewDelegate)null, "OK", null).Show();
                Debug.WriteLine(e);
            }
        }

        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)
            });
        }

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