/Main/src/DynamicDataDisplay/Common/Auxiliary/RectExtensions.cs

 1using System.Windows;
 2using Microsoft.Research.DynamicDataDisplay.Common;
 3using System.Diagnostics;
 4
 5namespace Microsoft.Research.DynamicDataDisplay
 6{
 7	public static class RectExtensions
 8	{
 9		public static Point GetCenter(this Rect rect)
10		{
11			return new Point(rect.Left + rect.Width * 0.5, rect.Top + rect.Height * 0.5);
12		}
13
14		public static Rect FromCenterSize(Point center, Size size)
15		{
16			return FromCenterSize(center, size.Width, size.Height);
17		}
18
19		public static Rect FromCenterSize(Point center, double width, double height)
20		{
21			Rect res = new Rect(center.X - width / 2, center.Y - height / 2, width, height);
22			return res;
23		}
24
25		public static Rect Zoom(this Rect rect, Point to, double ratio)
26		{
27			return CoordinateUtilities.RectZoom(rect, to, ratio);
28		}
29
30		public static Rect ZoomOutFromCenter(this Rect rect, double ratio)
31		{
32			return CoordinateUtilities.RectZoom(rect, rect.GetCenter(), ratio);
33		}
34
35		public static Rect ZoomInToCenter(this Rect rect, double ratio)
36		{
37			return CoordinateUtilities.RectZoom(rect, rect.GetCenter(), 1 / ratio);
38		}
39
40		public static Int32Rect ToInt32Rect(this Rect rect)
41		{
42			Int32Rect intRect = new Int32Rect(
43				(int)rect.X,
44				(int)rect.Y,
45				(int)rect.Width,
46				(int)rect.Height);
47
48			return intRect;
49		}
50
51		[DebuggerStepThrough]
52		public static DataRect ToDataRect(this Rect rect)
53		{
54			return new DataRect(rect);
55		}
56
57		internal static bool IsNaN(this Rect rect)
58		{
59			return !rect.IsEmpty && (
60				rect.X.IsNaN() ||
61				rect.Y.IsNaN() ||
62				rect.Width.IsNaN() ||
63				rect.Height.IsNaN()
64				);
65		}
66	}
67}