Source code for prsctrl_gui.app_state.device_manager

""""Singleton" module for the GUI's device manager.
"""
from devctrl.devices.device_manager import DeviceManager, DeviceInfo, Device

_devmg = None



def get() -> DeviceManager:
    """Get the initialized instance.

    :raises RuntimeError: If DeviceManager is not initialized.
    :return: Instance that was set using :func:`init`.
    """
    if not isinstance(_devmg, DeviceManager):
        raise RuntimeError(f"DeviceManager not initialized. Call init() first. (_devmg = '{_devmg}')")
    return _devmg




def init(devmg: DeviceManager):
    """Initialized the instance.

    :raises RuntimeError: If the instance is already initialized.
    """
    global _devmg
    if isinstance(_devmg, DeviceManager):
        raise RuntimeError(f"DeviceManager is already initialized.")
    _devmg = devmg