def __init__(self, _parent, _files_specifications): self.__data_vectors_accessor_group__ = DataVectorsAccessorGroup() count = len(_files_specifications) progressManager = ProgressDialogManager(_parent, label_text=("Preparing data"), max_value=count) with progressManager as progress: for idx in range(count): if (progress.wasCanceled()): break progress.increaseCounter() vector_accessor = get_data_accessor_from_file_specification( _parent, _files_specifications[idx]) self.__data_vectors_accessor_group__.addDataVectorAccessor( vector_accessor)