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Example Drag & Drop area in a custom inspector for the Unity editor
using UnityEngine;
using System.Collections;
using UnityEditor;
[CustomEditor (typeof(TriggerContainer))]
public class TriggerContainerEditor : Editor
private SerializedObject obj;
public void OnEnable ()
obj = new SerializedObject (target);
public override void OnInspectorGUI ()
DrawDefaultInspector ();
EditorGUILayout.Space ();
DropAreaGUI ();
public void DropAreaGUI ()
Event evt = Event.current;
Rect drop_area = GUILayoutUtility.GetRect (0.0f, 50.0f, GUILayout.ExpandWidth (true));
GUI.Box (drop_area, "Add Trigger");
switch (evt.type) {
case EventType.DragUpdated:
case EventType.DragPerform:
if (!drop_area.Contains (evt.mousePosition))
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
if (evt.type == EventType.DragPerform) {
DragAndDrop.AcceptDrag ();
foreach (Object dragged_object in DragAndDrop.objectReferences) {
// Do On Drag Stuff here
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