source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Common/Palettes/DiscretePalette.cs @ 13757

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Media;
using System.Windows.Markup;
using System.Collections.ObjectModel;
using System.ComponentModel;

namespace Microsoft.Research.DynamicDataDisplay.Common.Palettes
{
  [ContentProperty("Steps")]
  public class DiscretePalette : IPalette
  {
    private readonly ObservableCollection<LinearPaletteColorStep> steps = new ObservableCollection<LinearPaletteColorStep>();
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    public ObservableCollection<LinearPaletteColorStep> Steps
    {
      get { return steps; }
    }

    public DiscretePalette() { }
    public DiscretePalette(params LinearPaletteColorStep[] steps)
    {
      this.steps.AddMany(steps);
    }

    public Color GetColor(double t)
    {
      if (t <= 0) return Steps[0].Color;
      if (t >= Steps.Last().Offset) return steps.Last().Color;

      int i = 0;
      double x = 0;
      while (x < t && i < steps.Count)
      {
        x = Steps[i].Offset;
        i++;
      }

      Color result = Steps[i - 1].Color;
      return result;
    }

    #region IPalette Members

    public event EventHandler Changed;

    #endregion
  }
}