Many nice features

MaterialModernWPF/Service/CalculationPackageContainer.cs

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+using System.Linq;
+using DryIoc;
+using Prism.Events;
+using Prism.Regions;
+
+namespace MaterialModernWPF.Service
+{
+    public class CalculationPackageContainer
+    {
+        private readonly IRegionManager _regionManager;
+        private readonly IResolver _resolver;
+        public CalculationPackage[] CalculationPackages { get; }
+
+        public CalculationPackageContainer(
+            IEventAggregator eventAggregator, IRegionManager regionManager,
+            IResolver resolver)
+        {
+            _regionManager = regionManager;
+            _resolver = resolver;
+            CalculationPackages = resolver.ResolveMany<CalculationPackage>().ToArray();
+            eventAggregator.GetEvent<CalculationPackageSelectionChangedEvent>().Subscribe(SelectionChanged);
+        }
+
+        private void SelectionChanged((CalculationPackage sender, bool isSelected) payload)
+        {
+            var viewKey = payload.sender.CalculationViewType.FullName;
+            var region = _regionManager.Regions[Constants.PackagesRegion];
+            if (payload.isSelected)
+            {
+                var view = _resolver.Resolve(payload.sender.CalculationViewType);
+                region.Add(view, viewKey);
+            }
+            else
+            {
+                var view = region.GetView(viewKey);
+                region.Remove(view);
+            }
+        }
+    }
+}