source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Charts/Axes/TimeSpan/TimeSpanAxis.cs @ 12747

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Microsoft.Research.DynamicDataDisplay.Charts
{
  /// <summary>
  /// Represents axis with values of type TimeSpan.
  /// </summary>
  public class TimeSpanAxis : AxisBase<TimeSpan>
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="TimeSpanAxis"/> class with default values conversion.
    /// </summary>
    public TimeSpanAxis()
      : base(new TimeSpanAxisControl(),
        DoubleToTimeSpan, TimeSpanToDouble)
    { }

    private static readonly long minTicks = TimeSpan.MinValue.Ticks;
    private static readonly long maxTicks = TimeSpan.MaxValue.Ticks;
    private static TimeSpan DoubleToTimeSpan(double value)
    {
      long ticks = (long)(value * 10000000000L);

      // todo should we throw an exception if number of ticks is too big or small?
      if (ticks < minTicks)
        ticks = minTicks;
      else if (ticks > maxTicks)
        ticks = maxTicks;

      return new TimeSpan(ticks);
    }

    private static double TimeSpanToDouble(TimeSpan time)
    {
      return time.Ticks / 10000000000.0;
    }

    /// <summary>
    /// Sets conversions of axis - functions used to convert values of axis type to and from double values of viewport.
    /// Sets both ConvertToDouble and ConvertFromDouble properties.
    /// </summary>
    /// <param name="min">The minimal viewport value.</param>
    /// <param name="minValue">The value of axis type, corresponding to minimal viewport value.</param>
    /// <param name="max">The maximal viewport value.</param>
    /// <param name="maxValue">The value of axis type, corresponding to maximal viewport value.</param>
    public override void SetConversion(double min, TimeSpan minValue, double max, TimeSpan maxValue)
    {
      var conversion = new TimeSpanToDoubleConversion(min, minValue, max, maxValue);

      ConvertToDouble = conversion.ToDouble;
      ConvertFromDouble = conversion.FromDouble;
    }
  }
}