/// <summary>
/// Returns an array of summary objects.
/// </summary>
/// <param name="emptySummaries">The empty summaries.</param>
/// <returns></returns>
public ITreeTableSummary[] GetSummaries(ITreeTableEmptySummaryArraySource emptySummaries)
{
if (summaries == null)
{
summaries = OnGetSummaries(emptySummaries) ?? emptySummaryArray;
}
return(summaries);
}
/// <summary>
/// Returns an array of summary objects.
/// </summary>
public ITreeTableSummary[] GetSummaries(ITreeTableEmptySummaryArraySource emptySummaries)
{
if (this.Root == null)
{
return(emptySummaries.GetEmptySummaries());
}
return(((ITreeTableSummaryNode)this.Root).GetSummaries(emptySummaries));
}
/// <summary>
/// Called from <see cref="GetSummaries"/> when called the first time after summaries were invalidated.
/// </summary>
/// <param name="emptySummaries">The empty summaries.</param>
/// <returns></returns>
public virtual ITreeTableSummary[] OnGetSummaries(ITreeTableEmptySummaryArraySource emptySummaries)
{
ITreeTableSummary[] summaries = null;
ITreeTableSummaryArraySource summaryArraySource = GetSummaryArraySource();
if (summaryArraySource != null)
{
bool summaryChanged;
summaries = summaryArraySource.GetSummaries(emptySummaries, out summaryChanged);
}
return(summaries);
}
/// <summary>
/// Returns an array of summary objects.
/// </summary>
/// <param name="emptySummaries">The empty summaries.</param>
/// <returns></returns>
public ITreeTableSummary[] GetSummaries(ITreeTableEmptySummaryArraySource emptySummaries)
{
if (Tree.IsInitializing)
{
return(null);
}
else if (_summaries == null)
{
ITreeTableSummary[] left = GetLeftC().GetSummaries(emptySummaries);
ITreeTableSummary[] right = GetRightC().GetSummaries(emptySummaries);
if (left != null && right != null)
{
int reuseLeft = 0;
int reuseRight = 0;
_summaries = new ITreeTableSummary[left.Length];
for (int i = 0; i < _summaries.Length; i++)
{
_summaries[i] = left[i].Combine(right[i]);
// preserve memory optimization
if (reuseLeft == i || reuseRight == i)
{
if (Object.ReferenceEquals(_summaries[i], left[i]))
{
reuseLeft++;
}
else if (Object.ReferenceEquals(_summaries[i], right[i]))
{
reuseRight++;
}
}
}
// preserve memory optimization
if (reuseLeft == _summaries.Length)
{
_summaries = left;
}
else if (reuseRight == _summaries.Length)
{
_summaries = right;
}
}
}
return(_summaries);
}
/// <summary>
/// Returns an array of summary objects.
/// </summary>
public ITreeTableSummary[] GetSummaries(ITreeTableEmptySummaryArraySource emptySummaries)
{
return(thisTree.GetSummaries(emptySummaries));
}
