Finalized client-side storage

src/Artemis.UI/Adorners/BoundingBoxAdorner.cs

@@ -0,0 +1,44 @@
+using System.Windows;
+using System.Windows.Documents;
+using System.Windows.Media;
+
+namespace Artemis.UI.Adorners
+{
+    public class BoundingBoxAdorner : Adorner
+    {
+        private Color _boundingBoxColor;
+        private Rect _boundingBoxRect;
+
+        public BoundingBoxAdorner(UIElement adornedElement, Color boundingBoxColor) : base(adornedElement)
+        {
+            _boundingBoxRect = new Rect(new Size(0, 0));
+            BoundingBoxColor = boundingBoxColor;
+
+            IsHitTestVisible = false;
+        }
+
+        public Color BoundingBoxColor
+        {
+            get => _boundingBoxColor;
+            set
+            {
+                _boundingBoxColor = value;
+                InvalidateVisual();
+            }
+        }
+
+        protected override void OnRender(DrawingContext drawingContext)
+        {
+            var renderBrush = new SolidColorBrush(BoundingBoxColor) {Opacity = 0.2};
+            var renderPen = new Pen(new SolidColorBrush(BoundingBoxColor), 1.5);
+
+            drawingContext.DrawRectangle(renderBrush, renderPen, _boundingBoxRect);
+        }
+
+        public void Update(Point startingPoint, Point currentPoint)
+        {
+            _boundingBoxRect = new Rect(startingPoint, currentPoint);
+            InvalidateVisual();
+        }
+    }
+}