Initial Commit

Charts/Navigation/RectangleSelectionAdorner.cs

@@ -0,0 +1,48 @@
+using System.Windows;
+using System.Windows.Documents;
+using System.Windows.Media;
+
+namespace Microsoft.Research.DynamicDataDisplay.Navigation
+{
+    /// <summary>Helper class to draw semitransparent rectangle over the
+    /// selection area</summary>
+	public sealed class RectangleSelectionAdorner : Adorner {
+
+		private Rect? border = null;
+		public Rect? Border {
+			get { return border; }
+			set { border = value; }
+		}
+
+		public Brush Fill {
+			get { return (Brush)GetValue(FillProperty); }
+			set { SetValue(FillProperty, value); }
+		}
+
+		public static readonly DependencyProperty FillProperty =
+			DependencyProperty.Register(
+			  "Fill",
+			  typeof(Brush),
+			  typeof(RectangleSelectionAdorner),
+			  new FrameworkPropertyMetadata(
+				  new SolidColorBrush(Color.FromArgb(60, 100, 100, 100)),
+				  FrameworkPropertyMetadataOptions.AffectsRender));
+
+		private Pen pen;
+		public Pen Pen {
+			get { return pen; }
+			set { pen = value; }
+		}
+
+		public RectangleSelectionAdorner(UIElement element)
+			: base(element) {
+			pen = new Pen(Brushes.Black, 1.0);
+		}
+
+		protected override void OnRender(DrawingContext dc) {
+			if (border.HasValue) {
+				dc.DrawRectangle(Fill, pen, border.Value);
+			}
+		}
+	}
+}