# coding: utf-8
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"""Miscellaneous helpers for Qt"""

__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "09/03/2018"


import contextlib as _contextlib


@_contextlib.contextmanager
def blockSignals(*objs):
    """Context manager blocking signals of QObjects.

    It restores previous state when leaving.

    :param qt.QObject objs: QObjects for which to block signals
    """
    blocked = [(obj, obj.blockSignals(True)) for obj in objs]
    try:
        yield
    finally:
        for obj, previous in blocked:
            obj.blockSignals(previous)


class LockReentrant():
    """Context manager to lock a code block and check the state.
    """
    def __init__(self):
        self.__locked = False

    def __enter__(self):
        self.__locked = True

    def __exit__(self, exc_type, exc_val, exc_tb):
        self.__locked = False

    def locked(self):
        """Returns True if the code block is locked"""
        return self.__locked


def getQEventName(eventType):
    """
    Returns the name of a QEvent.

    :param Union[int,qt.QEvent] eventType: A QEvent or a QEvent type.
    :returns: str
    """
    from . import qtutils
    return qtutils.getQEventName(eventType)