public DisplayItemViewModel(DisplayContainerViewModel parent, UIElement control)
{
// Setup initial conditions.
this.parent = parent;
displaySettings = TestHarnessModel.Instance.Settings.ControlDisplayOptionSettings;
// Ensure the item is not already within the visual tree.
var parentBorder = control.GetParentVisual() as Border;
if (parentBorder != null) parentBorder.Child = null;
// Create it's container.
Control = control;
ControlContainer = new Border { Child = control };
// Wire up events.
ControlContainer.Loaded += delegate { InitializeContainerSize(); };
viewTestClassObserver = new PropertyObserver<ViewTestClass>(parent.model)
.RegisterHandler(m => m.CurrentViewTest, m => InitializeContainerSize());
displaySettingsObserver = new PropertyObserver<ControlDisplayOptionSettings>(displaySettings)
.RegisterHandler(s => s.ShowBorder, s => OnPropertyChanged<DisplayItemViewModel>(m => m.Border));
}