source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Charts/FilterCollection.cs @ 13072

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;
    }
  }
}