protected override void ProcessDragDrop(Point dropLocation, ISupportDrag dragObject)
{
GroupFieldDragDropContext dataContext1 = dragObject.GetDataContext() as GroupFieldDragDropContext;
if (dataContext1 != null)
{
dataContext1.ViewTemplate.GroupDescriptors.Remove(dataContext1.GroupDescription);
}
else
{
GridViewRowInfo dataContext2 = dragObject.GetDataContext() as GridViewRowInfo;
if (dataContext2 != null)
{
if (this.RowInfo.ViewTemplate.SortDescriptors.Count > 0 || this.RowInfo.ViewTemplate.GroupDescriptors.Count > 0)
{
return;
}
bool isDroppedAtLeft = RadGridViewDragDropService.IsDroppedAtTop(dropLocation, this.Size.Height);
GridViewTemplate viewTemplate = this.Data.ViewTemplate;
int targetIndex = viewTemplate.Rows.IndexOf(this.Data);
int draggedItemIndex = viewTemplate.Rows.IndexOf(dataContext2);
RadGridViewDragDropService.CalculateTargetIndex(isDroppedAtLeft, viewTemplate.RowCount, ref targetIndex, ref draggedItemIndex);
viewTemplate.Rows.Move(draggedItemIndex, targetIndex);
}
else
{
base.ProcessDragDrop(dropLocation, dragObject);
}
}
}
internal static void MoveOnLeftOrRight <T>(
bool isDroppedAtLeft,
Collection <T> collection,
T targetItem,
T draggedItem)
{
int targetIndex = collection.IndexOf(targetItem);
int draggedItemIndex = collection.IndexOf(draggedItem);
int count = collection.Count;
RadGridViewDragDropService.CalculateTargetIndex(isDroppedAtLeft, count, ref targetIndex, ref draggedItemIndex);
RadGridViewDragDropService.Move <T>(collection, draggedItemIndex, targetIndex);
}