from PyQt6.QtCore import pyqtSignal, QObject

from helpers import singleton


@singleton
class MusicMusterSignals(QObject):
    """
    Class for all MusicMuster signals. See:
     - https://zetcode.com/gui/pyqt5/eventssignals/
     - https://stackoverflow.com/questions/62654525/
        emit-a-signal-from-another-class-to-main-class
    and Singleton class at
    https://refactoring.guru/design-patterns/singleton/python/example#example-0
    """

    enable_escape_signal = pyqtSignal(bool)
    set_next_track_signal = pyqtSignal(int, int)
    span_cells_signal = pyqtSignal(int, int, int, int)
    add_track_to_playlist_signal = pyqtSignal(int, int, int, str)