fix drawLayer painting

from typing import Tuple, List, Union

import numpy as np

import cv2

from qtpy.QtCore import QRectF, Qt, QPointF, QSize, QPoint, QDateTime

from qtpy.QtWidgets import QStyleOptionGraphicsItem, QGraphicsPixmapItem, QWidget, QGraphicsPathItem, QGraphicsItem

from qtpy.QtGui import QPen, QColor, QPainterPath, QCursor, QPainter, QPixmap, QImage, QBrush

try:

    from qtpy.QtWidgets import QUndoCommand

except:

    from qtpy.QtGui import QUndoCommand

from .misc import DrawPanelConfig, pixmap2ndarray, ndarray2pixmap

from utils.io_utils import imread, imwrite

SIZE_MAX = 2147483647

    def paint(self, painter: QPainter, option: QStyleOptionGraphicsItem, widget: QWidget):

        pixmap = self.pixmap()

        if pixmap.isNull():

            self.drawed_pixmap = None

            return

        p = QPainter()

        p.begin(pixmap)

        for key in self.qimg_dict: