source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Common/RangeConverter.cs @ 12503

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Globalization;
using Microsoft.Research.DynamicDataDisplay.Charts;

namespace Microsoft.Research.DynamicDataDisplay.Common
{
  public sealed class RangeConverter : TypeConverter
  {
    public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
    {
      return (sourceType == typeof(string)) || base.CanConvertFrom(context, sourceType);
    }

    public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
    {
      return (destinationType == typeof(string)) || base.CanConvertTo(context, destinationType);
    }

    public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
    {
      if (value == null)
      {
        throw base.GetConvertFromException(value);
      }

      string source = value as string;
      if (source != null)
      {
        var parts = source.Split('-');
        var minStr = parts[0];
        var maxStr = parts[1];

        int minInt32 = 0;
        double minDouble = 0;
        DateTime minDateTime = DateTime.Now;
        if (Int32.TryParse(minStr, NumberStyles.Integer, culture, out minInt32))
        {
          int maxInt32 = Int32.Parse(maxStr, NumberStyles.Integer, culture);

          return new Range<int>(minInt32, maxInt32);
        }
        else if (Double.TryParse(minStr, NumberStyles.Float, culture, out minDouble))
        {
          double maxDouble = Double.Parse(maxStr, NumberStyles.Float, culture);
          return new Range<double>(minDouble, maxDouble);
        }
        else if (DateTime.TryParse(minStr, culture, DateTimeStyles.None, out minDateTime))
        {
          DateTime maxDateTime = DateTime.Parse(maxStr, culture);
          return new Range<DateTime>(minDateTime, maxDateTime);
        }
      }

      return base.ConvertFrom(context, culture, value);
    }

    public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
    {
      if (destinationType != null && value is DataRect)
      {
        DataRect rect = (DataRect)value;
        if (destinationType == typeof(string))
        {
          return rect.ConvertToString(null, culture);
        }
      }
      return base.ConvertTo(context, culture, value, destinationType);
    }
  }
}