internal void HideFarDropMark()
{
int itemsCount = this.Items.Count;
if (itemsCount > 0)
{
HierarchicalGroupByItem hierarchicalGroupByItem = null;
if (itemsCount > 1)
{
// Hide the before last item's DropMark if any in case
hierarchicalGroupByItem = this.ItemContainerGenerator.ContainerFromIndex(itemsCount - 2) as HierarchicalGroupByItem;
Debug.Assert(hierarchicalGroupByItem != null);
if (hierarchicalGroupByItem != null)
{
hierarchicalGroupByItem.HideDropMark();
}
}
// Hide last item's DropMark if any
hierarchicalGroupByItem = this.ItemContainerGenerator.ContainerFromIndex(itemsCount - 1) as HierarchicalGroupByItem;
Debug.Assert(hierarchicalGroupByItem != null);
if (hierarchicalGroupByItem != null)
{
hierarchicalGroupByItem.HideDropMark();
}
}
if (m_dropMarkAdorner != null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(m_dropMarkAdorner);
}
m_dropMarkAdorner = null;
}
}
internal void HideFarDropMark(ColumnManagerCell cell)
{
Debug.Assert(cell != null);
if (cell == null)
{
return;
}
DataGridContext cellDataGridContext = DataGridControl.GetDataGridContext(cell);
Debug.Assert(cellDataGridContext != null);
if (cellDataGridContext == null)
{
throw new DataGridInternalException("DataGridContext cannot be null on ColumnManagerCell.");
}
this.HideFarDropMark();
// We already have GroupLevelDescriptions for this level, we should show DropMark on the last HierarchicalGroupByItem
if (cellDataGridContext.GroupLevelDescriptions.Count > 0)
{
Debug.Assert(cellDataGridContext.GroupLevelDescriptions == this.GroupLevelDescriptions);
if (cellDataGridContext.GroupLevelDescriptions != this.GroupLevelDescriptions)
{
return;
}
int lastIndex = this.GroupLevelDescriptions.Count - 1;
if (lastIndex > -1)
{
HierarchicalGroupByItem hierarchicalGroupByItem = this.ItemContainerGenerator.ContainerFromItem(this.GroupLevelDescriptions[lastIndex]) as HierarchicalGroupByItem;
Debug.Assert(hierarchicalGroupByItem != null);
if (hierarchicalGroupByItem == null)
{
return;
}
hierarchicalGroupByItem.HideDropMark();
}
}
}