QPainter drawline doesnt show correctly after scrolling back and forth horizontally with QTableView

[JohnLim02]

Hello, I am new to using PYQT5,
I am trying to create a 2D graphical polygon image using QPainter and Integrate inside QTableView using the StyledItemDeligate function. I manage to show what I want, However as u can see the arrow should only appears on the first 2 column but when I scroll next and went back again, it shows 4 arrow for 4 column instead of 2 arrow in 2 column. Below is my code. I am not sure if there is some sort of rendering issue I would need to consider when playing with scroll bar.

from PyQt5 import QtCore, QtWidgets, QtGui
import sys

class TableModel(QtCore.QAbstractTableModel):

    def __init__(self, data = [[]], headers = None, parent = None):
        QtCore.QAbstractTableModel.__init__(self, parent)
        self.__data = data

    def rowCount(self, parent):
        return len(self.__data)

    def columnCount(self, parent):
        return len(self.__data[0])

    def data(self, index, role):
        row = index.row()
        column = index.column()
        if role == QtCore.Qt.DisplayRole:
            value = self.__data[row][column]
            return value

    def flags(self, index):
        return QtCore.Qt.ItemIsEnabled|QtCore.Qt.ItemIsEditable|QtCore.Qt.ItemIsSelectable

class Delegate(QtWidgets.QStyledItemDelegate):

    def paint(self, painter, option, index):  

      
            # image = QtGui.QImage('open.png')
            # pixmap = QtGui.QPixmap.fromImage(image)

            # x = option.rect.center().x() - pixmap.rect().width() / 2
            # y = option.rect.center().y() - pixmap.rect().height() / 2
            # painter.drawPixmap(x, y, pixmap)

        painter.drawLine(0, 17, 124, 17)
        painter.drawLine(0, 17, 20, 35)
        painter.drawLine(0, 17, 20, 1)
        painter.drawLine(124, 17, 248, 17)
        painter.drawLine(124, 17, 150, 35)
        painter.drawLine(124, 17, 150, 1)
        painter.drawLine(248, 17, 372, 17)
        painter.drawLine(372, 17, 496, 17)
        painter.drawLine(496, 17, 620, 17)
        painter.drawLine(620, 17, 744, 17)
        
       

if __name__ == '__main__':

    app = QtWidgets.QApplication(sys.argv)
    app.setStyle('fusion')

    tableView = QtWidgets.QTableView()
    tableView.setShowGrid(False)
    header = tableView.horizontalHeader()
    header. hide()
    
    # delegate1 = Delegate()
    # delegate2 = Delegate()
    dict = {}
    for i in range(1, 9):
        key = str("delegate" + str(i))
        dict[key] = Delegate()

    # tableView.setItemDelegateForColumn(0, Delegate())
    # tableView.setItemDelegateForColumn(1, Delegate())
    array1 = [Delegate(), Delegate(), Delegate(), Delegate(), Delegate(), Delegate(),Delegate(),Delegate()]
    for i in range(1, 9):
        tableView.setItemDelegateForColumn(i-1, array1[i -1])
    
    tableView.resize(550, 160)
    tableView.show()

    rowCount = 1
    columnCount = 40
    data = [
       [1,2,3,4,5,6,7,8]
    ]

    print(data)

    model = TableModel(data)
    tableView.setModel(model)
    tableView.setEditTriggers(QtWidgets.QTableWidget.NoEditTriggers)

    sys.exit(app.exec_())