Initial Commit

Charts/Shapes/HorizontalLine.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Shapes;
+using System.Windows;
+using System.Windows.Media;
+using Microsoft.Research.DynamicDataDisplay;
+
+namespace Microsoft.Research.DynamicDataDisplay.Charts
+{
+	/// <summary>
+	/// Represents an infinite horizontal line with y-coordinate.
+	/// </summary>
+	public sealed class HorizontalLine : SimpleLine
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="HorizontalLine"/> class.
+		/// </summary>
+		public HorizontalLine() { }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="HorizontalLine"/> class with specified y coordinate.
+		/// </summary>
+		/// <param name="yCoordinate">The y coordinate of line.</param>
+		public HorizontalLine(double yCoordinate)
+		{
+			Value = yCoordinate;
+		}
+
+		protected override void UpdateUIRepresentationCore()
+		{
+			var transform = Plotter.Viewport.Transform;
+
+			Point p1 = new Point(Plotter.Viewport.Visible.XMin, Value).DataToScreen(transform);
+			Point p2 = new Point(Plotter.Viewport.Visible.XMax, Value).DataToScreen(transform);
+
+			LineGeometry.StartPoint = p1;
+			LineGeometry.EndPoint = p2;
+		}
+	}
+}