/// <summary>
/// Callback that is invoked when external file(s) are
/// dragged-and-dropped into the Project Browser.
/// </summary>
private static void HandleDragAndDrop(string targetPath, string[] droppedPaths)
{
// Hold the Control key or Command key while
// dragging-and-dropping a .gltf/.glb/.zip to
// copy the file into the project without
// performing an automatic glTF import.
if (Event.current.control || Event.current.command)
{
return;
}
// Read current import options from Piglet Options window.
//
// Note: The SaveAssets/Refresh calls ensure that any changes
// made in the Piglet Options window are saved out to disk
// first.
AssetDatabase.SaveAssets();
AssetDatabase.Refresh();
_importOptions = Resources.Load <ImportOptions>("ImportOptions");
// Do nothing if drag-and-drop glTF import has been disabled by the user
if (!_importOptions.EnableDragAndDropImport)
{
return;
}
// If `targetPath` is a regular file and not a directory, use
// the parent directory as the import directory.
string importDir = Directory.Exists(targetPath)
? targetPath : Path.GetDirectoryName(targetPath);
importDir = UnityPathUtil.NormalizePathSeparators(importDir);
// Exclude files that don't have .gltf/.glb extension.
//
// Note: I would prefer to pass skipped files through to Unity
// for default drag-and-drop handling, but that does not seem
// to be possible because `DragAndDrop.paths` is read-only.
List <string> acceptedPaths = new List <string>();
foreach (string path in DragAndDrop.paths)
{
// Don't trigger automatic glTF import when we are dragging
// a .gltf/.glb/.zip file from within the Unity project folder.
//
// When the source file is inside the Unity project folder,
// the Unity drag-and-drop machinery will report a relative path
// starting with "Assets/".
if (path.StartsWith("Assets/"))
{
continue;
}
string _path = path.ToLower();
if (_path.EndsWith(".gltf") || _path.EndsWith(".glb"))
{
acceptedPaths.Add(path);
}
else if (_path.EndsWith(".zip") && ZipUtil.ContainsGltfFile(path))
{
acceptedPaths.Add(path);
}
}
if (acceptedPaths.Count > 0)
{
// Run GLTF import(s) in the background.
StartImport(acceptedPaths, importDir);
// Consume the `DragPerform` event, so that Unity's
// default drag-and-drop handling, which
// simply copies the file(s) into the target Assets
// folder, is not performed.
Event.current.Use();
}
}