Initial Commit

Common/Auxiliary/BoundsHelper.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Windows;
+using Microsoft.Research.DynamicDataDisplay.Common;
+
+namespace Microsoft.Research.DynamicDataDisplay
+{
+	public static class BoundsHelper
+	{
+		/// <summary>Computes bounding rectangle for sequence of points</summary>
+		/// <param name="points">Points sequence</param>
+		/// <returns>Minimal axis-aligned bounding rectangle</returns>
+		public static DataRect GetViewportBounds(IEnumerable<Point> viewportPoints)
+		{
+			DataRect bounds = DataRect.Empty;
+
+			double xMin = Double.PositiveInfinity;
+			double xMax = Double.NegativeInfinity;
+
+			double yMin = Double.PositiveInfinity;
+			double yMax = Double.NegativeInfinity;
+
+			foreach (Point p in viewportPoints)
+			{
+				xMin = Math.Min(xMin, p.X);
+				xMax = Math.Max(xMax, p.X);
+
+				yMin = Math.Min(yMin, p.Y);
+				yMax = Math.Max(yMax, p.Y);
+			}
+
+			// were some points in collection
+			if (!Double.IsInfinity(xMin))
+			{
+				bounds = DataRect.Create(xMin, yMin, xMax, yMax);
+			}
+
+			return bounds;
+		}
+
+		public static DataRect GetViewportBounds(IEnumerable<Point> dataPoints, DataTransform transform)
+		{
+			return GetViewportBounds(dataPoints.DataToViewport(transform));
+		}
+	}
+}