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 = 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());
}
/// <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)))
{
return(false);
}
string s = item.ToString();
if (string.IsNullOrEmpty(s))
{
return(false); // we consider empty string as invalid data here
}
if (IsSuspended) // when suspended: performance tweak, see overrides OnSuspended and OnResume for details (if suspended, we have saved the state of the instance for comparison when we resume).
{
if (!_itemList.Contains(s))
{
_itemList.Add(s);
}
}
else // not suspended: normal behaviour with change notification
{
if (!_itemList.Contains(s))
{
_itemList.Add(s);
EhSelfChanged(new BoundariesChangedEventArgs(BoundariesChangedData.NumberOfItemsChanged | BoundariesChangedData.UpperBoundChanged));
}
}
return(true);
}
protected override string FormatItem(Altaxo.Data.AltaxoVariant item)
{
if (item.IsType(Altaxo.Data.AltaxoVariant.Content.VDouble))
{
return(FormatItem(item));
}
else
{
return(item.ToString());
}
}
/// <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);
}
protected override string FormatItem(Altaxo.Data.AltaxoVariant item)
{
return(item.ToString());
}
