Initial Commit

Charts/FilterCollection.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Research.DynamicDataDisplay.Filters;
+using Microsoft.Research.DynamicDataDisplay.Common;
+using System.Collections.Specialized;
+using System.Windows;
+
+namespace Microsoft.Research.DynamicDataDisplay.Charts
+{
+	/// <summary>
+	/// Represents a collection of point filters of <see cref="LineGraph"/>.
+	/// </summary>
+	public sealed class FilterCollection : D3Collection<IPointsFilter>
+	{
+		protected override void OnItemAdding(IPointsFilter item)
+		{
+			if (item == null)
+				throw new ArgumentNullException("item");
+		}
+
+		protected override void OnItemAdded(IPointsFilter item)
+		{
+			item.Changed += OnItemChanged;
+		}
+
+		private void OnItemChanged(object sender, EventArgs e)
+		{
+			OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+		}
+
+		protected override void OnItemRemoving(IPointsFilter item)
+		{
+			item.Changed -= OnItemChanged;
+		}
+
+		internal List<Point> Filter(List<Point> points, Rect screenRect)
+		{
+			foreach (var filter in Items)
+			{
+				filter.SetScreenRect(screenRect);
+				points = filter.Filter(points);
+			}
+
+			return points;
+		}
+	}
+}