internal DataGridRowGroupHeader GetUsedGroupHeader()
{
if (_recyclableGroupHeaders.Count > 0)
{
return(_recyclableGroupHeaders.Pop());
}
else if (_fullyRecycledGroupHeaders.Count > 0)
{
// For fully recycled rows, we need to set the Visibility back to Visible
DataGridRowGroupHeader groupHeader = _fullyRecycledGroupHeaders.Pop();
groupHeader.IsVisible = true;
return(groupHeader);
}
return(null);
}
private static double ValidateSublevelIndent(DataGridRowGroupHeader header, double value)
{
// We don't need to revert to the old value if our input is bad because we never read this property value
if (double.IsNaN(value))
{
throw DataGridError.DataGrid.ValueCannotBeSetToNAN(nameof(SublevelIndent));
}
else if (double.IsInfinity(value))
{
throw DataGridError.DataGrid.ValueCannotBeSetToInfinity(nameof(SublevelIndent));
}
else if (value < 0)
{
throw DataGridError.DataGrid.ValueMustBeGreaterThanOrEqualTo(nameof(value), nameof(SublevelIndent), 0);
}
return(value);
}
internal void FullyRecycleElements()
{
// Fully recycle Recycleable rows and transfer them to Recycled rows
while (_recyclableRows.Count > 0)
{
DataGridRow row = _recyclableRows.Pop();
Debug.Assert(row != null);
row.IsVisible = false;
Debug.Assert(!_fullyRecycledRows.Contains(row));
_fullyRecycledRows.Push(row);
}
// Fully recycle Recycleable GroupHeaders and transfer them to Recycled GroupHeaders
while (_recyclableGroupHeaders.Count > 0)
{
DataGridRowGroupHeader groupHeader = _recyclableGroupHeaders.Pop();
Debug.Assert(groupHeader != null);
groupHeader.IsVisible = false;
Debug.Assert(!_fullyRecycledGroupHeaders.Contains(groupHeader));
_fullyRecycledGroupHeaders.Push(groupHeader);
}
}
internal void AddRecylableRowGroupHeader(DataGridRowGroupHeader groupHeader)
{
Debug.Assert(!_recyclableGroupHeaders.Contains(groupHeader));
groupHeader.IsRecycled = true;
_recyclableGroupHeaders.Push(groupHeader);
}
/// <summary>
/// Constructs a DataGridRowGroupHeaderEventArgs instance
/// </summary>
/// <param name="rowGroupHeader"></param>
public DataGridRowGroupHeaderEventArgs(DataGridRowGroupHeader rowGroupHeader)
{
RowGroupHeader = rowGroupHeader;
}