protected override string FormatItem(Altaxo.Data.AltaxoVariant item)
{
if (item.IsType(Altaxo.Data.AltaxoVariant.Content.VDouble))
return FormatItem((double)item);
else
return item.ToString();
}
protected override string FormatItem(Altaxo.Data.AltaxoVariant item)
{
const double tolerance = 1E-8;
int denominator = 1440; // this allows for resolution of a quarter of a degree
if (!item.CanConvertedToDouble)
return item.ToString();
double value = (double)item;
double multipvalue = value * denominator / Math.PI;
double multipround = Math.Round(multipvalue, 0);
if (Math.Abs(multipvalue - multipround) < tolerance && Math.Abs(multipround) < int.MaxValue) // then it is a ratio of pi
{
int nominator = (int)multipround;
Shorten(ref nominator, ref denominator);
if (nominator == 0)
return "0";
else
{
string pre;
if (nominator == 1)
pre = string.Empty;
else if (nominator == -1)
pre = "-";
else
pre = nominator.ToString();
string post;
if (denominator == 1)
post = string.Empty;
else
post = "/" + denominator.ToString();
return pre + '\u03c0' + post;
}
}
return item.ToString();
}
protected override string FormatItem(Altaxo.Data.AltaxoVariant item)
{
return item.ToString();
}
public override double PhysicalVariantToNormal(Altaxo.Data.AltaxoVariant x)
{
if (x.IsType(Altaxo.Data.AltaxoVariant.Content.VString))
{
int idx = _dataBounds.IndexOf(x.ToString());
return idx < 0 ? double.NaN : (1 + idx - _cachedAxisOrg) * _cachedOneByAxisSpan;
}
else if (x.CanConvertedToDouble)
{
return (x.ToDouble() - _cachedAxisOrg) * _cachedOneByAxisSpan;
}
else
{
return double.NaN;
}
}
/// <summary>
/// Processes a single value .
/// If the data value is text, the boundaries are
/// updated and the number of items is increased by one (if not contained already). The function returns true
/// in this case. On the other hand, if the value is outside the range, the function has to
/// return false.
/// </summary>
/// <param name="item">The data item.</param>
/// <returns>True if data is in the tracked range, false if the data is not in the tracked range.</returns>
public bool Add(Altaxo.Data.AltaxoVariant item)
{
if(item.IsType(Altaxo.Data.AltaxoVariant.Content.VString))
{
string s = item.ToString();
if (!_itemList.Contains(s))
{
_itemList.Add(s);
if (_eventSuspendCount == 0)
{
OnNumberOfItemsChanged();
OnBoundaryChanged(false, true);
}
return true;
}
}
return false;
}
