public override void OnDrop(IListDragAndDropArgs args)
{
var insertAtId = m_TreeView.GetIdForIndex(args.insertAtIndex);
var insertAtParentId = m_TreeView.GetParentIdForIndex(args.insertAtIndex);
var insertAtChildIndex = m_TreeView.viewController.GetChildIndexForId(insertAtId);
if (args.dragAndDropPosition == DragAndDropPosition.OverItem || (insertAtId == -1 && insertAtParentId == -1 && insertAtChildIndex == -1))
{
for (var i = 0; i < m_SelectedIndices.Count; i++)
{
var index = m_SelectedIndices[i];
var id = m_TreeView.GetIdForIndex(index);
var parentId = insertAtId;
var childIndex = -1;
m_TreeView.viewController.Move(id, parentId, childIndex, false);
}
}
else
{
for (var i = m_SelectedIndices.Count - 1; i >= 0; --i)
{
var index = m_SelectedIndices[i];
var id = m_TreeView.GetIdForIndex(index);
var parentId = insertAtParentId;
var childIndex = insertAtChildIndex;
m_TreeView.viewController.Move(id, parentId, childIndex, false);
}
}
m_TreeView.viewController.RebuildTree();
m_TreeView.RefreshItems();
}
internal static void AddItem(BaseTreeView treeView, TreeViewItemData <T> item, int parentId = -1, int childIndex = -1, bool rebuildTree = true)
{
if (treeView.viewController is TDefaultController defaultController)
{
defaultController.AddItem(item, parentId, childIndex, rebuildTree);
if (rebuildTree)
{
treeView.RefreshItems();
}
return;
}
Type dataSourceType = null;
if (treeView.viewController?.GetType().GetGenericTypeDefinition() == typeof(TDefaultController).GetGenericTypeDefinition())
{
dataSourceType = treeView.viewController?.GetType().GetGenericArguments()[0];
}
throw new ArgumentException($"Type parameter ({typeof(T)}) differs from data source ({dataSourceType})and is not recognized by the controller.");
}