from PySide6.QtCore import QObject, Signal


class SignalBus(QObject):
    instance = None

    def __new__(cls):
        if cls.instance is None:
            cls.instance = super(SignalBus, cls).__new__(cls)
        return cls.instance

    def __init__(self):
        super().__init__()

    current_stacked_page = Signal(str)         # 获取当前页面的page_id
    init_stacked_page = Signal(str)            # 设置打开侧边栏后的初始页面
    qa_stacked_page_switch = Signal(str)       # 切换stacked widget页面
    home_overlay_trigger = Signal()            # 触发软件锁屏
    home_overlay_auth = Signal()               # 触发密码框的显示与隐藏
    home_overlay_close = Signal()              # 退出锁屏后的收尾信号
    list_widget_click = Signal(str)            # 触发点击list widget信号
    list_widget_on_off = Signal(bool)          # 主动控制是否显示list widget组件



signal_bus = SignalBus()