/// <summary>
/// Show child rows
/// </summary>
/// <param name="index">Which row to expand</param>
/// <param name="maxDepth">How far down to expand</param>
/// <returns></returns>
protected int expand(int index, int maxDepth)
{
var rowInfo = expandedRowList[index];
if (!rowInfo.HasChildRows || rowInfo.ExpandedChildRows.Count > 0 && maxDepth == 0)
{
return(0); // row already expanded, nothing to do
}
int rowsAdded = 0;
if (rowInfo.ExpandedChildRows.Count == 0)
{
if (!rowInfo.ChildRowCount.HasValue)
{
var e = new TreeDataGridViewChildRowCountNeededEventArgs(rowInfo.RowIndexHierarchy);
OnChildRowCountNeeded(e);
rowInfo.ChildRowCount = e.ChildRowCount;
}
var childRowList = new List <ExpandedRowList>(rowInfo.ChildRowCount.Value);
for (int j = 0; j < rowInfo.ChildRowCount; ++j)
{
//get the content of the child row and add it to list to be inserted
var childRowInfo = new ExpandedRowList(rowInfo.RowIndexHierarchy, j);
var cellValueEventArgs = new TreeDataGridViewCellValueEventArgs(0, childRowInfo.RowIndexHierarchy);
CellValueNeeded(this, cellValueEventArgs);
childRowInfo.ChildRowCount = cellValueEventArgs.ChildRowCount;
childRowInfo.HasChildRows = cellValueEventArgs.HasChildRows;
childRowList.Add(childRowInfo);
}
//insert new rows into table
rowInfo.ExpandedChildRows = childRowList;
expandedRowList.InsertRange(index + 1, childRowList);
rowsAdded = childRowList.Count;
}
//If more expansion is needed recurse back to the begining
if (maxDepth > rowInfo.RowIndexHierarchy.Count)
{
for (int j = 0; j < rowInfo.ChildRowCount; ++j)
{
rowsAdded += expand(index + rowsAdded + 1 - rowInfo.ChildRowCount.Value + j, maxDepth);
}
}
return(rowsAdded);
}
/// <summary>
/// Show child rows
/// </summary>
/// <param name="index">Which row to expand</param>
/// <param name="maxDepth">How far down to expand</param>
/// <returns></returns>
protected int expand (int index, int maxDepth)
{
var rowInfo = expandedRowList[index];
if (!rowInfo.HasChildRows || rowInfo.ExpandedChildRows.Count > 0 && maxDepth == 0)
return 0; // row already expanded, nothing to do
int rowsAdded = 0;
if (rowInfo.ExpandedChildRows.Count == 0)
{
if (!rowInfo.ChildRowCount.HasValue)
{
var e = new TreeDataGridViewChildRowCountNeededEventArgs(rowInfo.RowIndexHierarchy);
OnChildRowCountNeeded(e);
rowInfo.ChildRowCount = e.ChildRowCount;
}
var childRowList = new List<ExpandedRowList>(rowInfo.ChildRowCount.Value);
for (int j = 0; j < rowInfo.ChildRowCount; ++j)
{
//get the content of the child row and add it to list to be inserted
var childRowInfo = new ExpandedRowList(rowInfo.RowIndexHierarchy, j);
var cellValueEventArgs = new TreeDataGridViewCellValueEventArgs(0, childRowInfo.RowIndexHierarchy);
CellValueNeeded(this, cellValueEventArgs);
childRowInfo.ChildRowCount = cellValueEventArgs.ChildRowCount;
childRowInfo.HasChildRows = cellValueEventArgs.HasChildRows;
childRowList.Add(childRowInfo);
}
//insert new rows into table
rowInfo.ExpandedChildRows = childRowList;
expandedRowList.InsertRange(index + 1, childRowList);
rowsAdded = childRowList.Count;
}
//If more expansion is needed recurse back to the begining
if (maxDepth > rowInfo.RowIndexHierarchy.Count)
for (int j = 0; j < rowInfo.ChildRowCount; ++j)
rowsAdded += expand(index + rowsAdded + 1 - rowInfo.ChildRowCount.Value + j, maxDepth);
return rowsAdded;
}