/Main/src/DynamicDataDisplay/Charts/Shapes/ViewportPolygon.cs

 1using System;
 2using System.Collections.Generic;
 3using System.Linq;
 4using System.Text;
 5using System.Windows.Media;
 6using System.Windows;
 7using System.Windows.Shapes;
 8
 9namespace Microsoft.Research.DynamicDataDisplay.Charts.Shapes
10{
11	/// <summary>
12	/// Represents a closed filled figure with points in Viewport coordinates.
13	/// </summary>
14	public sealed class ViewportPolygon : ViewportPolylineBase
15	{
16		static ViewportPolygon()
17		{
18			Type type = typeof(ViewportPolygon);
19			Shape.FillProperty.AddOwner(type, new FrameworkPropertyMetadata(Brushes.Coral));
20		}
21
22		/// <summary>
23		/// Initializes a new instance of the <see cref="ViewportPolygon"/> class.
24		/// </summary>
25		public ViewportPolygon() { }
26
27		protected override void UpdateUIRepresentationCore()
28		{
29			var transform = Plotter.Viewport.Transform;
30
31			PathGeometry geometry = PathGeometry;
32
33			PointCollection points = Points;
34			geometry.Clear();
35
36			if (points == null) { }
37			else
38			{
39				PathFigure figure = new PathFigure();
40				if (points.Count > 0)
41				{
42					figure.StartPoint = points[0].DataToScreen(transform);
43					if (points.Count > 1)
44					{
45						Point[] pointArray = new Point[points.Count - 1];
46						for (int i = 1; i < points.Count; i++)
47						{
48							pointArray[i - 1] = points[i].DataToScreen(transform);
49						}
50						figure.Segments.Add(new PolyLineSegment(pointArray, true));
51						figure.IsClosed = true;
52					}
53				}
54				geometry.Figures.Add(figure);
55				geometry.FillRule = this.FillRule;
56			}
57		}
58	}
59}