using UnityEditor;
using UnityEngine;

public class CustomEditorPanel : EditorWindow
{
    private GameObject draggedObject;

    [MenuItem("Window/Custom Editor Panel")]
    public static void ShowWindow()
    {
        GetWindow<CustomEditorPanel>("Custom Editor Panel");
    }

    private void OnGUI()
    {
        Event currentEvent = Event.current;
        Rect dropArea = GUILayoutUtility.GetRect(0, 50, GUILayout.ExpandWidth(true));

        GUI.Box(dropArea, "拖过去会在节点下新建一个空节点");

        switch (currentEvent.type)
        {
            case EventType.DragUpdated:
            case EventType.DragPerform:
                if (!dropArea.Contains(currentEvent.mousePosition))
                    break;

                DragAndDrop.visualMode = DragAndDropVisualMode.Copy;

                if (currentEvent.type == EventType.DragPerform)
                {
                    DragAndDrop.AcceptDrag();

                    foreach (GameObject dragged in DragAndDrop.objectReferences)
                    {
                        draggedObject = dragged;

                        // 创建新的GameObject作为子节点
                        GameObject newObject = new GameObject("New Object");
                        newObject.name = dragged.name;
                        newObject.transform.SetParent(draggedObject.transform);
                        newObject.transform.localPosition = Vector3.zero;
                    }
                }

                Event.current.Use();
                break;
        }

        if (draggedObject != null)
        {
            EditorGUILayout.LabelField("Dragged GameObject:", draggedObject.name);
        }
    }
}