private T[] ShowDropButton <T>(bool isEnabled, IsValidAssetDelegate IsValidAsset) where T : UnityEngine.Object
{
T[] returnValue = null;
Rect drop_area = GUILayoutUtility.GetRect(0.0f, 80.0f, GUILayout.ExpandWidth(true));
GUI.enabled = isEnabled;
GUI.Box(drop_area, "Drop Animation files here", _dropBoxStyle);
GUI.enabled = true;
if (!isEnabled)
{
return(null);
}
Event evt = Event.current;
switch (evt.type)
{
case EventType.DragUpdated:
case EventType.DragPerform:
if (!drop_area.Contains(evt.mousePosition) ||
!DraggedObjectsContainValidObject <T>(IsValidAsset))
{
return(null);
}
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
if (evt.type == EventType.DragPerform)
{
DragAndDrop.AcceptDrag();
List <T> validObjects = new List <T>();
foreach (UnityEngine.Object dragged_object in DragAndDrop.objectReferences)
{
var assetPath = AssetDatabase.GetAssetPath(dragged_object);
if (dragged_object is T && IsValidAsset(assetPath))
{
validObjects.Add(dragged_object as T);
}
}
returnValue = validObjects.ToArray();
}
evt.Use();
break;
}
return(returnValue);
}
private bool DraggedObjectsContainValidObject <T>(IsValidAssetDelegate IsValidAsset) where T : UnityEngine.Object
{
foreach (UnityEngine.Object dragged_object in DragAndDrop.objectReferences)
{
var assetPath = AssetDatabase.GetAssetPath(dragged_object);
if (dragged_object is T && IsValidAsset(assetPath))
{
return(true);
}
}
return(false);
}
