/Main/src/DynamicDataDisplay/Charts/Isolines/AdditionalLinesDisplay.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Media;

using System.Windows;

using Microsoft.Research.DynamicDataDisplay.Common.Auxiliary;

using Microsoft.Research.DynamicDataDisplay.Charts.NewLine;



namespace Microsoft.Research.DynamicDataDisplay.Charts.Isolines

{

	public sealed class AdditionalLinesDisplay : IsolineGraphBase

	{

		protected override void OnPlotterAttached()

		{

			base.OnPlotterAttached();



			Plotter2D.Viewport.PropertyChanged += Viewport_PropertyChanged;

		}



		protected override void OnPlotterDetaching()

		{

			Plotter2D.Viewport.PropertyChanged -= Viewport_PropertyChanged;



			base.OnPlotterDetaching();

		}



		void Viewport_PropertyChanged(object sender, ExtendedPropertyChangedEventArgs e)

		{

			InvalidateVisual();

		}



		protected override void OnRender(DrawingContext drawingContext)

		{

			if (Plotter2D == null) return;

			if (DataSource == null) return;

			if (Collection == null) return;

			if (Collection.Lines.Count == 0)

			{

				IsolineBuilder.DataSource = DataSource;

			}



			var dc = drawingContext;

			var dataSource = DataSource;

			var localMinMax = dataSource.GetMinMax();

			var globalMinMax = dataSource.Range.Value;

			double lengthsRatio = globalMinMax.GetLength() / localMinMax.GetLength();



			if (lengthsRatio > 16)

			{

				double log = Math.Round(Math.Log(lengthsRatio, 2));

				double number = 2 * Math.Pow(2, log);

				double delta = globalMinMax.GetLength() / number;



				double start = Math.Floor((localMinMax.Min - globalMinMax.Min) / delta) * delta + globalMinMax.Min;

				double end = localMinMax.Max;



				var transform = Plotter2D.Transform;

				var strokeThickness = StrokeThickness;



				double x = start;

				while (x < end)

				{

					var collection = IsolineBuilder.BuildIsoline(x);



					foreach (LevelLine line in collection)

					{

						StreamGeometry lineGeometry = new StreamGeometry();

						using (var context = lineGeometry.Open())

						{

							context.BeginFigure(line.StartPoint.ViewportToScreen(transform), false, false);

							context.PolyLineTo(line.OtherPoints.ViewportToScreen(transform).ToArray(), true, true);

						}

						lineGeometry.Freeze();



						var paletteRatio = (line.RealValue - globalMinMax.Min) / globalMinMax.GetLength();

						Pen pen = new Pen(new SolidColorBrush(Palette.GetColor(paletteRatio)), strokeThickness);



						dc.DrawGeometry(null, pen, lineGeometry);

					}



					x += delta;

				}

			}

			//dc.DrawRectangle(Brushes.Green.MakeTransparent(0.3), null, new Rect(RenderSize));

		}

	}

}