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// Amplify Shader Editor - Visual Shader Editing Tool
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
using UnityEditor;
using UnityEngine;
namespace AmplifyShaderEditor
{
public class DragAndDropTool
{
public delegate void OnValidDropObject(params UnityEngine.Object[] draggedObjs );
public event OnValidDropObject OnValidDropObjectEvt;
public void Destroy()
{
OnValidDropObjectEvt = null;
}
public void TestDragAndDrop( Rect dropArea )
{
Event currentEvent = Event.current;
EventType currentEventType = currentEvent.type;
switch (currentEventType)
{
case EventType.DragUpdated:
case EventType.DragPerform:
{
if (!dropArea.Contains(currentEvent.mousePosition))
return;
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
if (currentEvent.type == EventType.DragPerform)
{
DragAndDrop.AcceptDrag();
if (OnValidDropObjectEvt != null)
{
OnValidDropObjectEvt(DragAndDrop.objectReferences);
}
}
}break;
case EventType.DragExited:DragAndDrop.PrepareStartDrag();break;
}
}
}
}
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