void IDropTarget.Drop(UIElement draggedElement, RelativePoint mousePosition)
{
if (m_dropMarkAdorner == null)
{
return;
}
var dataGridContext = DataGridControl.GetDataGridContext(this);
if (dataGridContext == null)
{
return;
}
var draggedOverGroupLevelDescription = this.Content as GroupLevelDescription;
if (draggedOverGroupLevelDescription == null)
{
return;
}
var alignment = m_dropMarkAdorner.Alignment;
this.HideDropMark();
var draggedCell = draggedElement as ColumnManagerCell;
if (draggedCell != null)
{
GroupingHelper.AddNewGroupFromColumnManagerCell(draggedCell, draggedOverGroupLevelDescription, alignment, dataGridContext.DataGridControl);
}
else
{
var draggedGroupBy = draggedElement as GroupByItem;
Debug.Assert(draggedGroupBy != null);
if (draggedGroupBy != null)
{
var draggedGroupLevelDescription = draggedGroupBy.Content as GroupLevelDescription;
GroupingHelper.MoveGroupDescription(dataGridContext.Columns, dataGridContext.Items.GroupDescriptions, draggedOverGroupLevelDescription, alignment, draggedGroupLevelDescription, dataGridContext.DataGridControl);
}
}
}
void IDropTarget.Drop(UIElement draggedElement)
{
if (m_dropMarkAdorner != null)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
Debug.Assert(dataGridContext != null);
if (dataGridContext != null)
{
GroupLevelDescription draggedOverGroupLevelDescription = this.Content as GroupLevelDescription;
Debug.Assert(draggedOverGroupLevelDescription != null);
if (draggedOverGroupLevelDescription != null)
{
DropMarkAlignment alignment = m_dropMarkAdorner.Alignment;
this.HideDropMark();
ColumnManagerCell draggedCell = draggedElement as ColumnManagerCell;
if (draggedCell != null)
{
GroupingHelper.AddNewGroupFromColumnManagerCell(draggedCell, draggedOverGroupLevelDescription, alignment, dataGridContext.DataGridControl);
}
else
{
GroupByItem draggedGroupBy = draggedElement as GroupByItem;
Debug.Assert(draggedGroupBy != null);
if (draggedGroupBy != null)
{
GroupLevelDescription draggedGroupLevelDescription = draggedGroupBy.Content as GroupLevelDescription;
GroupingHelper.MoveGroupDescription(dataGridContext.Columns, dataGridContext.Items.GroupDescriptions, draggedOverGroupLevelDescription, alignment, draggedGroupLevelDescription, dataGridContext.DataGridControl);
}
}
}
}
}
}
public static void AppendNewGroupFromColumnManagerCell(ColumnManagerCell cell, DataGridControl parentDataGridControl)
{
GroupingHelper.AddNewGroupFromColumnManagerCell(cell, null, DropMarkAlignment.Far, parentDataGridControl);
}
void IDropTarget.Drop(UIElement draggedElement)
{
ColumnManagerCell draggedColumnManagerCell = draggedElement as ColumnManagerCell;
if (m_dropMarkAdorner != null)
{
GroupLevelDescription draggedOverGroupLevelDescription = this.Content as GroupLevelDescription;
DropMarkAlignment alignment = m_dropMarkAdorner.Alignment;
this.HideDropMark();
if (draggedColumnManagerCell != null)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl parentGrid = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
GroupingHelper.AddNewGroupFromColumnManagerCell(draggedColumnManagerCell, draggedOverGroupLevelDescription, alignment, parentGrid);
}
else
{
HierarchicalGroupByItem draggedGroupByItem = draggedElement as HierarchicalGroupByItem;
if (draggedGroupByItem == null)
{
return;
}
GroupLevelDescription draggedGroupLevelDescription = draggedGroupByItem.Content as GroupLevelDescription;
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl parentDataGridControl = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
GroupLevelDescription destinationGroupLevelDescription = this.Content as GroupLevelDescription;
GroupingHelper.MoveGroupDescription(this.ParentColumns, this.ParentGroupDescriptions,
destinationGroupLevelDescription, alignment,
draggedGroupLevelDescription, parentDataGridControl);
}
}
else
{
// We try to add a new Group which is not in the current GroupLevelDescriptions
if (draggedColumnManagerCell == null)
{
return;
}
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(this);
DataGridControl parentGrid = (dataGridContext != null)
? dataGridContext.DataGridControl
: null;
GroupingHelper.AppendNewGroupFromColumnManagerCell(draggedColumnManagerCell, parentGrid);
}
HierarchicalGroupByControl parentGBC = GroupingHelper.GetHierarchicalGroupByControl(this);
Debug.Assert(parentGBC != null);
if (parentGBC == null)
{
throw new DataGridInternalException("A hierarchical group-by item must be rooted by a HierarchicalGroupByControl.");
}
// Notify groups have changed for NoGroupContent
parentGBC.UpdateHasGroups();
}