protected override DropPosition GetDropPosition(DragEventArgs args, RowColumnIndex rowColumnIndex)
{
bool canDrop = true;
var p = args.GetPosition(this.TreeGrid);
var treeNode = this.TreeGrid.GetNodeAtRowIndex(rowColumnIndex.RowIndex);
ScrollAxisRegion columnRegion = ScrollAxisRegion.Body;
var treeGridPanel = TreeGrid.GetTreePanel();
if (treeGridPanel.FrozenColumns > 0)
{
columnRegion = ScrollAxisRegion.Header;
}
var rowRect = treeGridPanel.RangeToRect(ScrollAxisRegion.Body, columnRegion, rowColumnIndex, true, false);
var node = treeNode;
if (!canDrop)
{
return(DropPosition.None);
}
else if (p.Y > rowRect.Y + 15 && p.Y < rowRect.Y + 35)
{
return(DropPosition.DropAsChild);
}
else if (p.Y < rowRect.Y + 15)
{
return(DropPosition.DropAbove);
}
else if (p.Y > rowRect.Y + 35)
{
return(DropPosition.DropBelow);
}
else
{
return(DropPosition.Default);
}
}