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();
}
}
/// <summary>
/// Resumes changed events, either with taking the accumulated event data into account (see <see cref="Resume(ref ISuspendToken)"/>) or discarding the accumulated event data (see <see cref="ResumeSilently"/>,
/// depending on the provided argument <paramref name="eventFiring"/>.
/// </summary>
/// <param name="suspendToken">The suspend token.</param>
/// <param name="eventFiring">This argument determines if the events are resumed taking the event data into account, or the resume is silent, i.e. accumulated event data are discarded.</param>
public void Resume(ref ISuspendToken suspendToken, EventFiring eventFiring)
{
if (null != suspendToken)
{
suspendToken.Resume(eventFiring);
suspendToken = null;
}
}
/// <summary>
/// Resumes changed events by calling <see cref="ISuspendToken.Resume()"/> for the provided suspend token, and setting the reference to the suspend token to null.
/// If Event data were accumulated during the suspended state, a changed event is triggered for each event data.
/// </summary>
/// <param name="suspendToken">The suspend token.</param>
public void Resume(ref ISuspendToken suspendToken)
{
if (null != suspendToken)
{
suspendToken.Resume();
suspendToken = null;
}
}