bool IsValidSubSceneDropTarget(int dropTargetGameObjectOrSceneInstanceID, DropPosition dropPosition, Object[] draggedObjects)
{
if (draggedObjects == null || draggedObjects.Length == 0)
{
return(false);
}
Transform parentForDrop = GetTransformParentForDrop(dropTargetGameObjectOrSceneInstanceID, dropPosition);
if (parentForDrop == null)
{
// Drop is on a root scene which is always allowed
return(true);
}
foreach (var obj in draggedObjects)
{
var gameObject = obj as GameObject;
if (gameObject == null)
{
continue;
}
// Require all dragged objects to be valid (since native cannot filter out invalid sub scene drags currently)
if (SubSceneGUI.IsChildOrSameAsOtherTransform(parentForDrop, gameObject.transform))
{
return(false);
}
}
// Valid drop target for current dragged objects
return(true);
}
private static bool CanSetParent(Transform transform, Transform target)
{
bool canSetParent = transform != target;
if (target != null)
{
canSetParent = canSetParent && !transform.IsChildOf(target) && !target.IsChildOf(transform);
}
if (SubSceneGUI.IsSubSceneHeader(transform.gameObject))
{
canSetParent = canSetParent && !SubSceneGUI.IsChildOrSameAsOtherTransform(transform, target) && !SubSceneGUI.IsChildOrSameAsOtherTransform(target, transform);
}
return(canSetParent);
}
public static bool CanSetNewParent(Transform transform, Transform newParent)
{
if (transform == null)
{
throw new ArgumentNullException("transform");
}
if (newParent == null)
{
return(true);
}
RefreshSubSceneInfo();
var parentIsChild = SubSceneGUI.IsChildOrSameAsOtherTransform(newParent, transform);
return(!parentIsChild);
}