protected void CopySelectedAssset()
        {
            string assetTypeDir;

            switch (fileType)
            {
            case FileType.SCENE_BACKGROUND:
                assetTypeDir = AssetsController.CATEGORY_BACKGROUND_FOLDER;
                break;

            case FileType.SCENE_FOREGROUND:
                assetTypeDir = AssetsController.CATEGORY_BACKGROUND_FOLDER;
                break;

            case FileType.SCENE_MUSIC:
            case FileType.EXIT_MUSIC:
            case FileType.CUTSCENE_MUSIC:
            case FileType.FRAME_MUSIC:
            case FileType.ITEM_DESCRIPTION_NAME_SOUND:
            case FileType.ITEM_DESCRIPTION_BRIEF_SOUND:
            case FileType.ITEM_DESCRIPTION_DETAILED_SOUND:
            case FileType.NPC_DESCRIPTION_NAME_SOUND:
            case FileType.NPC_DESCRIPTION_BRIEF_SOUND:
            case FileType.NPC_DESCRIPTION_DETAILED_SOUND:
            case FileType.PLAY_SOUND_EFFECT:
                assetTypeDir = AssetsController.CATEGORY_AUDIO_PATH;
                break;

            case FileType.EXIT_ICON:
                assetTypeDir = AssetsController.CATEGORY_CURSOR_PATH;
                break;

            case FileType.CUTSCENE_VIDEO:
                assetTypeDir = AssetsController.CATEGORY_VIDEO_PATH;
                break;

            case FileType.CUTSCENE_SLIDES:
            case FileType.CHARACTER_ANIM:
            case FileType.PLAY_ANIMATION_EFFECT:
                //TODO: copy all assets files (slides, music)
                assetTypeDir = AssetsController.CATEGORY_ANIMATION_FOLDER;
                break;

            case FileType.FRAME_IMAGE:
                assetTypeDir = AssetsController.CATEGORY_ANIMATION_FOLDER;
                break;

            case FileType.BOOK_IMAGE_PARAGRAPH:
            case FileType.ITEM_IMAGE:
            case FileType.ITEM_IMAGE_OVER:
            case FileType.SET_ITEM_IMAGE:
                assetTypeDir = AssetsController.CATEGORY_IMAGE_FOLDER;
                break;

            case FileType.ITEM_ICON:
                assetTypeDir = AssetsController.CATEGORY_ICON_FOLDER;
                break;

            case FileType.BOOK_ARROW_LEFT_NORMAL:
            case FileType.BOOK_ARROW_RIGHT_NORMAL:
            case FileType.BOOK_ARROW_LEFT_OVER:
            case FileType.BOOK_ARROW_RIGHT_OVER:
                assetTypeDir = AssetsController.CATEGORY_ARROW_BOOK_PATH;
                break;

            default:
                assetTypeDir = "";
                break;
            }

            string file = Controller.getInstance().getProjectFolder();

            DirectoryInfo path = new DirectoryInfo(DIR_PREFIX + "/" + assetTypeDir);

            if (!Directory.Exists(path.FullName))
            {
                Directory.CreateDirectory(path.FullName);
            }

            string nameOnly = Path.GetFileName(selectedAssetPath);

            if (selectedAssetPath != Path.Combine(path.FullName, nameOnly)) // Avoid to copy the same origin to same destination files
            {
                File.Copy(selectedAssetPath, Path.Combine(path.FullName, nameOnly), true);

                if (fileType == FileType.CUTSCENE_SLIDES || fileType == FileType.CHARACTER_ANIM || fileType == FileType.PLAY_ANIMATION_EFFECT)
                {
                    AssetsController.copyAllFiles(Path.GetDirectoryName(selectedAssetPath), path.FullName);
                }
                AssetDatabase.Refresh();
            }

            returnPath = assetTypeDir + "/" + nameOnly;
        }