public void CalculateCachedData()
{
if (IsDisposeInProgress)
{
return;
}
// we can calulate the bounds only if they are set before
if (null == _xBoundaries && null == _yBoundaries && null == _zBoundaries)
{
return;
}
ISuspendToken suspendTokenX = null;
ISuspendToken suspendTokenY = null;
ISuspendToken suspendTokenZ = null;
suspendTokenX = _xBoundaries?.SuspendGetToken();
suspendTokenY = _yBoundaries?.SuspendGetToken();
suspendTokenZ = _zBoundaries?.SuspendGetToken();
try
{
_xBoundaries?.Reset();
_yBoundaries?.Reset();
_zBoundaries?.Reset();
_pointCount = GetMaximumRowIndexFromDataColumns();
IReadableColumn xColumn = XColumn;
IReadableColumn yColumn = YColumn;
IReadableColumn zColumn = ZColumn;
foreach (var segment in _dataRowSelection.GetSelectedRowIndexSegmentsFromTo(0, _pointCount, _dataTable?.Document?.DataColumns, _pointCount))
{
for (int rowIdx = segment.start; rowIdx < segment.endExclusive; ++rowIdx)
{
if (!xColumn.IsElementEmpty(rowIdx) && !yColumn.IsElementEmpty(rowIdx) && !zColumn.IsElementEmpty(rowIdx))
{
_xBoundaries?.Add(xColumn, rowIdx);
_yBoundaries?.Add(yColumn, rowIdx);
_zBoundaries?.Add(zColumn, rowIdx);
}
}
}
// now the cached data are valid
_isCachedDataValidX = null != _xBoundaries;
_isCachedDataValidY = null != _yBoundaries;
_isCachedDataValidZ = null != _zBoundaries;
// now when the cached data are valid, we can reenable the events
}
finally
{
suspendTokenX?.Resume();
suspendTokenY?.Resume();
suspendTokenZ?.Resume();
}
}
public bool IsElementEmpty(int i)
{
if (_originalColumn.IsElementEmpty(i))
{
return(true);
}
var val = _transformation.Transform(_originalColumn[i]);
if (val.IsType(AltaxoVariant.Content.VDouble) && double.IsNaN(val))
{
return(true);
}
if (val.IsType(AltaxoVariant.Content.VString) && null == (string)val)
{
return(true);
}
return(false);
}
public void CalculateCachedData()
{
// we can calulate the bounds only if they are set before
if (null == _xBoundaries || null == _yBoundaries)
{
return;
}
_plottablePoints = 0;
this._xBoundaries.BeginUpdate(); // disable events
this._yBoundaries.BeginUpdate(); // disable events
this._xBoundaries.Reset();
this._yBoundaries.Reset();
System.Diagnostics.Debug.Assert(_plotRangeStart >= 0);
System.Diagnostics.Debug.Assert(_plotRangeLength >= 0);
_pointCount = _plotRangeLength == int.MaxValue ? int.MaxValue : _plotRangeStart + _plotRangeLength;
IReadableColumn xColumn = this.XColumn;
IReadableColumn yColumn = this.YColumn;
if (xColumn == null || yColumn == null)
{
_pointCount = 0;
_plottablePoints = 0;
}
else
{
if (xColumn is IDefinedCount)
{
_pointCount = System.Math.Min(_pointCount, ((IDefinedCount)xColumn).Count);
}
if (yColumn is IDefinedCount)
{
_pointCount = System.Math.Min(_pointCount, ((IDefinedCount)yColumn).Count);
}
// if both columns are indefinite long, we set the length to zero
if (_pointCount == int.MaxValue || _pointCount < 0)
{
_pointCount = 0;
}
for (int i = _plotRangeStart; i < _pointCount; i++)
{
if (!xColumn.IsElementEmpty(i) && !yColumn.IsElementEmpty(i))
{
bool x_added = this._xBoundaries.Add(xColumn, i);
bool y_added = this._yBoundaries.Add(yColumn, i);
if (x_added && y_added)
{
_plottablePoints++;
}
}
}
}
// now the cached data are valid
_isCachedDataValid = true;
// now when the cached data are valid, we can reenable the events
this._xBoundaries.EndUpdate(); // enable events
this._yBoundaries.EndUpdate(); // enable events
}