using UnityEngine;
using UnityEngine.EventSystems;

namespace UIWidgets
{
	[RequireComponent(typeof(TreeView))]
	public class TreeViewDropSupport : MonoBehaviour, IDropSupport<TreeNode<TreeViewItem>>, IDropSupport<ListViewIconsItemDescription>
	{
		private TreeView source;

		public TreeView Source
		{
			get
			{
				if (source == null)
				{
					source = GetComponent<TreeView>();
				}
				return source;
			}
		}

		public bool CanReceiveDrop(TreeNode<TreeViewItem> data, PointerEventData eventData)
		{
			return Source.Nodes == null || !Source.Nodes.Contains(data);
		}

		public void Drop(TreeNode<TreeViewItem> data, PointerEventData eventData)
		{
			if (Source.Nodes == null)
			{
				Source.Nodes = new ObservableList<TreeNode<TreeViewItem>>();
			}
			Source.Nodes.Add(data);
		}

		public void DropCanceled(TreeNode<TreeViewItem> data, PointerEventData eventData)
		{
		}

		public bool CanReceiveDrop(ListViewIconsItemDescription data, PointerEventData eventData)
		{
			return true;
		}

		public void Drop(ListViewIconsItemDescription data, PointerEventData eventData)
		{
			if (Source.Nodes == null)
			{
				Source.Nodes = new ObservableList<TreeNode<TreeViewItem>>();
			}
			TreeViewItem treeViewItem = new TreeViewItem(data.Name);
			treeViewItem.LocalizedName = data.LocalizedName;
			treeViewItem.Icon = data.Icon;
			treeViewItem.Value = data.Value;
			TreeViewItem nodeItem = treeViewItem;
			TreeNode<TreeViewItem> item = new TreeNode<TreeViewItem>(nodeItem);
			Source.Nodes.Add(item);
		}

		public void DropCanceled(ListViewIconsItemDescription data, PointerEventData eventData)
		{
		}
	}
}