Initial Commit

Common/Auxiliary/DataRectExtensions.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using Microsoft.Research.DynamicDataDisplay.Common;
+
+namespace Microsoft.Research.DynamicDataDisplay
+{
+	public static class DataRectExtensions
+	{
+		internal static bool IsNaN(this DataRect rect)
+		{
+			return !rect.IsEmpty &&
+				(
+				rect.XMin.IsNaN() ||
+				rect.YMin.IsNaN() ||
+				rect.XMax.IsNaN() ||
+				rect.YMax.IsNaN()
+				);
+		}
+
+		public static Point GetCenter(this DataRect rect)
+		{
+			return new Point(rect.XMin + rect.Width * 0.5, rect.YMin + rect.Height * 0.5);
+		}
+
+		public static DataRect Zoom(this DataRect rect, Point to, double ratio)
+		{
+			return CoordinateUtilities.RectZoom(rect, to, ratio);
+		}
+
+		public static DataRect ZoomOutFromCenter(this DataRect rect, double ratio)
+		{
+			return CoordinateUtilities.RectZoom(rect, rect.GetCenter(), ratio);
+		}
+
+		public static DataRect ZoomInToCenter(this DataRect rect, double ratio)
+		{
+			return CoordinateUtilities.RectZoom(rect, rect.GetCenter(), 1 / ratio);
+		}
+
+		public static DataRect ZoomX(this DataRect rect, Point to, double ratio)
+		{
+			return CoordinateUtilities.RectZoomX(rect, to, ratio);
+		}
+
+		public static DataRect ZoomY(this DataRect rect, Point to, double ratio)
+		{
+			return CoordinateUtilities.RectZoomY(rect, to, ratio);
+		}
+
+		public static double GetSquare(this DataRect rect)
+		{
+			if (rect.IsEmpty)
+				return 0;
+
+			return rect.Width * rect.Height;
+		}
+
+		/// <summary>
+		/// Determines whether one DataRect is close to another DataRect.
+		/// </summary>
+		/// <param name="rect1">The rect1.</param>
+		/// <param name="rect2">The rect2.</param>
+		/// <param name="difference">The difference.</param>
+		/// <returns>
+		/// 	<c>true</c> if [is close to] [the specified rect1]; otherwise, <c>false</c>.
+		/// </returns>
+		public static bool IsCloseTo(this DataRect rect1, DataRect rect2, double difference)
+		{
+			DataRect intersection = DataRect.Intersect(rect1, rect2);
+			double square1 = rect1.GetSquare();
+			double square2 = rect2.GetSquare();
+			double intersectionSquare = intersection.GetSquare();
+
+			bool areClose = MathHelper.AreClose(square1, intersectionSquare, difference) &&
+				MathHelper.AreClose(square2, intersectionSquare, difference);
+			return areClose;
+		}
+	}
+}