protected override void InsertItem(int columnIndex, DataGridColumn dataGridColumn)
{
try
{
_owningGrid.NoCurrentCellChangeCount++;
if (_owningGrid.InDisplayIndexAdjustments)
{
// We are within columns display indexes adjustments. We do not allow changing the column collection while adjusting display indexes.
throw DataGridError.DataGrid.CannotChangeColumnCollectionWhileAdjustingDisplayIndexes();
}
if (dataGridColumn == null)
{
throw new ArgumentNullException("dataGridColumn");
}
int columnIndexWithFiller = columnIndex;
if (dataGridColumn != RowGroupSpacerColumn && RowGroupSpacerColumn.IsRepresented)
{
columnIndexWithFiller++;
}
// get the new current cell coordinates
DataGridCellCoordinates newCurrentCellCoordinates = _owningGrid.OnInsertingColumn(columnIndex, dataGridColumn);
// insert the column into our internal list
ItemsInternal.Insert(columnIndexWithFiller, dataGridColumn);
dataGridColumn.Index = columnIndexWithFiller;
dataGridColumn.OwningGrid = _owningGrid;
dataGridColumn.RemoveEditingElement();
if (dataGridColumn.IsVisible)
{
VisibleEdgedColumnsWidth += dataGridColumn.ActualWidth;
}
// continue with the base insert
_owningGrid.OnInsertedColumn_PreNotification(dataGridColumn);
_owningGrid.OnColumnCollectionChanged_PreNotification(true /*columnsGrew*/);
if (dataGridColumn != RowGroupSpacerColumn)
{
base.InsertItem(columnIndex, dataGridColumn);
}
_owningGrid.OnInsertedColumn_PostNotification(newCurrentCellCoordinates, dataGridColumn.DisplayIndex);
_owningGrid.OnColumnCollectionChanged_PostNotification(true /*columnsGrew*/);
}
finally
{
_owningGrid.NoCurrentCellChangeCount--;
}
}
/// <summary>
/// Inserts the child node.
/// </summary>
/// <param name="index">The index.</param>
/// <param name="node">The node.</param>
/// <returns></returns>
public bool InsertChildNode(int index, SceneNode node)
{
if (node == null || node.IsAttached || itemHashSet.ContainsKey(node.GUID))
{
return(false);
}
itemHashSet.Add(node.GUID, node);
ItemsInternal.Insert(index, node);
node.Parent = this;
if (IsAttached)
{
node.Attach(EffectsManager);
InvalidateSceneGraph();
}
ChildNodeAdded?.Invoke(this, new OnChildNodeChangedArgs(node, Operation.Add));
return(true);
}