internal void ShowFarDropMark(Point mousePosition)
{
int itemsCount = this.Items.Count;
if (itemsCount < 1)
{
if (m_dropMarkAdorner == null)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl grid = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
Pen pen = UIViewBase.GetDropMarkPen(this);
if ((pen == null) && (grid != null))
{
UIViewBase uiViewBase = grid.GetView() as UIViewBase;
pen = uiViewBase.DefaultDropMarkPen;
}
DropMarkOrientation orientation = UIViewBase.GetDropMarkOrientation(this);
if ((orientation == DropMarkOrientation.Default) && (grid != null))
{
UIViewBase uiViewBase = grid.GetView() as UIViewBase;
orientation = uiViewBase.DefaultDropMarkOrientation;
}
m_dropMarkAdorner = new DropMarkAdorner(this, pen, orientation);
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Add(m_dropMarkAdorner);
}
}
// We Only want the drop mark to be displayed at the end of the HierarchicalGroupByControlNode
m_dropMarkAdorner.ForceAlignment(DropMarkAlignment.Far);
}
else
{
HierarchicalGroupByItem hierarchicalGroupByItem = this.ItemContainerGenerator.ContainerFromIndex(itemsCount - 1) as HierarchicalGroupByItem;
Debug.Assert(hierarchicalGroupByItem != null);
GroupLevelDescription groupLevelDescription = hierarchicalGroupByItem.Content as GroupLevelDescription;
Debug.Assert(groupLevelDescription != null);
// Show Far DropMark only if not already grouped
if (this.Items.Contains(groupLevelDescription) == false)
{
hierarchicalGroupByItem.ShowFarDropMark(mousePosition);
}
}
}
internal void ShowFarDropMark(ColumnManagerCell cell, Point mousePosition)
{
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.");
}
// 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 there
if (lastIndex > -1)
{
HierarchicalGroupByItem hierarchicalGroupByItem = this.ItemContainerGenerator.ContainerFromItem(this.GroupLevelDescriptions[lastIndex]) as HierarchicalGroupByItem;
Debug.Assert(hierarchicalGroupByItem != null);
if (hierarchicalGroupByItem == null)
{
return;
}
hierarchicalGroupByItem.ShowFarDropMark(mousePosition);
}
else
{
this.ShowFarDropMark(mousePosition);
}
}
else
{
this.ShowFarDropMark(mousePosition);
}
}