Fix SettingsViewModelTest.CannotAddChildElementToFormatElement.

Tests/ViewModels/SettingsViewModelTest.cs

@@ -58,7 +58,7 @@ namespace Tests.ViewModels
             parent.IsSelected = true;
             Assert.IsTrue(_settingsVM.AddChildElementCommand.CanExecute(null));
             FormatElementViewModel child = new FormatElementViewModel(new Items());
-            parent.AddChildElement(child);
+            _settingsVM.AddChildElementViewModel(parent, child);
             parent.IsSelected = false;
             child.IsSelected = true;
             Assert.IsFalse(_settingsVM.AddChildElementCommand.CanExecute(null));

zaaReloaded2/Controller/Elements/ControlElementBase.cs

@@ -31,7 +31,9 @@ namespace zaaReloaded2.Controller.Elements
         /// </summary>
         public IList<FormatElementBase> FormatElements { get; private set; }
 
-        public ControlElementBase() { }
+        public ControlElementBase()
+            : this(new List<FormatElementBase>())
+        { }
 
         public ControlElementBase(IList<FormatElementBase> formatElements)
         {

zaaReloaded2/ViewModels/ControlElementViewModel.cs

@@ -26,24 +26,26 @@ using System.Collections.ObjectModel;
 
 namespace zaaReloaded2.ViewModels
 {
-    class ControlElementViewModel : ElementViewModel
+    public class ControlElementViewModel : ElementViewModel
     {
         #region Properties
 
-        public ObservableCollection<ElementViewModel> Elements
+        /// <summary>
-        {
+        /// Gets a collection of child ElementViewModels.
-            get { return null; }
+        /// </summary>
-        }
+        public ObservableCollection<ElementViewModel> Elements { get; protected set; }
 
         #endregion
 
         #region Constructors
 
-        public ControlElementViewModel() : base() { }
+        public ControlElementViewModel() : this(null) { }
 
         public ControlElementViewModel(ControlElementBase controlElement)
             : base(controlElement)
-        { }
+        {
+            Elements = new ObservableCollection<ElementViewModel>();
+        }
 
         #endregion
 

zaaReloaded2/ViewModels/FormatElementViewModel.cs

@@ -24,7 +24,7 @@ using zaaReloaded2.Controller.Elements;
 
 namespace zaaReloaded2.ViewModels
 {
-    class FormatElementViewModel : ElementViewModel
+    public class FormatElementViewModel : ElementViewModel
     {
         #region Public properties
 

zaaReloaded2/ViewModels/SettingsViewModel.cs

@@ -218,6 +218,17 @@ namespace zaaReloaded2.ViewModels
             Elements.Add(elementViewModel);
         }
 
+        /// <summary>
+        /// Wires the OnProperty changed event of an ElementViewModel's
+        /// wrapped model and adds the view model as a child of another
+        /// view model.
+        /// </summary>
+        public void AddChildElementViewModel(ControlElementViewModel parent, FormatElementViewModel child)
+        {
+            child.PropertyChanged += ElementViewModel_PropertyChanged;
+            parent.AddChildElement(child);
+        }
+
         #endregion
 
         #region Private methods
@@ -246,7 +257,7 @@ namespace zaaReloaded2.ViewModels
         void ElementViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
         {
             ElementViewModel vm = sender as ElementViewModel;
-            if (vm != null)
+            if (vm != null && e.PropertyName == "IsSelected")
             {
                 SelectedElement = vm.IsSelected ? vm : null;
             }