protected override void ProcessDragDrop(Point dropLocation, ISupportDrag dragObject)
{
object dataContext = dragObject.GetDataContext();
RadPosition dropPosition = RadGridViewDragDropService.GetDropPosition(dropLocation, this.Size);
ColumnGroupsViewDefinition viewDefinition = this.ViewTemplate.ViewDefinition as ColumnGroupsViewDefinition;
if (viewDefinition != null)
{
if (dataContext is GridViewColumnGroup)
{
((GridViewColumnGroup)dataContext).IsVisible = true;
this.TableElement.UpdateLayout();
if (!this.ViewTemplate.AllowColumnReorder)
{
return;
}
this.DropColumnGroup(viewDefinition, (GridViewColumnGroup)dataContext, dropPosition);
return;
}
if (dataContext is GridViewDataColumn || dataContext is GridViewGroupColumn)
{
this.DropInColumnGroupsView(viewDefinition, dataContext as GridViewColumn, dropPosition);
return;
}
}
base.ProcessDragDrop(dropLocation, dragObject);
}
public override void UpdateDropContext(
ISupportDrag draggedContext,
ISupportDrop dropTarget,
Point?location)
{
GridColumnGroupCellElement groupCellElement = dropTarget as GridColumnGroupCellElement;
GridHeaderCellElement headerCellElement = dropTarget as GridHeaderCellElement;
GridViewGroupColumn gridViewGroupColumn = groupCellElement != null ? groupCellElement.ColumnInfo as GridViewGroupColumn : (GridViewGroupColumn)null;
if (headerCellElement == null || !location.HasValue)
{
this.orientation = Orientation.Vertical;
}
else
{
if (headerCellElement.RowElement == null || headerCellElement.RowElement.TableElement == null)
{
return;
}
Rectangle boundingRectangle1 = headerCellElement.ControlBoundingRectangle;
Rectangle boundingRectangle2 = headerCellElement.RowElement.TableElement.ViewElement.ControlBoundingRectangle;
if (boundingRectangle1.Right > boundingRectangle2.Right)
{
boundingRectangle1.Width -= boundingRectangle1.Right - boundingRectangle2.Right;
}
if (boundingRectangle1.X < boundingRectangle2.X)
{
boundingRectangle1.Width -= boundingRectangle2.X - boundingRectangle1.X;
boundingRectangle1.X = boundingRectangle2.X;
}
if ((RadGridViewDragDropService.GetDropPosition(headerCellElement.PointFromScreen(location.Value), headerCellElement.Size) & RadPosition.Bottom) != RadPosition.None && (gridViewGroupColumn != null && gridViewGroupColumn.Group.Rows.Count == 0 && draggedContext.GetDataContext() is GridViewGroupColumn || gridViewGroupColumn != null && gridViewGroupColumn.Group.Groups.Count == 0 && draggedContext.GetDataContext() is GridViewDataColumn || gridViewGroupColumn == null))
{
this.orientation = Orientation.Horizontal;
}
else
{
this.orientation = Orientation.Vertical;
}
}
}
protected override void HandleMouseMove(Point mousePosition)
{
ISupportDrop dropTarget = this.DropTarget;
this.AutoScroll();
base.HandleMouseMove(mousePosition);
RadElement radElement = dropTarget as RadElement;
RadPosition radPosition = RadPosition.None;
if (radElement != null)
{
radPosition = RadGridViewDragDropService.GetDropPosition(radElement.PointFromScreen(mousePosition), radElement.ControlBoundingRectangle.Size);
}
if (dropTarget != this.DropTarget || dropTarget == null || radPosition != this.lastDropPosition)
{
this.SetDragDropBehavior();
}
this.lastDropPosition = radPosition;
if (this.dragHintWindow == null)
{
return;
}
this.UpdateDragHintLocation(mousePosition);
}