如何在PyQt的单元格中居中显示图像？

from PyQt5.QtWidgets import QApplication, QMainWindow, QTableView, QStyledItemDelegate, QWidget, QHBoxLayout, QLabel
from PyQt5.QtCore import Qt, QModelIndex
from PyQt5.QtGui import QPixmap

class ImageDelegate(QStyledItemDelegate):
    def paint(self, painter, option, index):
        if index.data():
            pixmap = QPixmap(index.data())
            size = option.rect.size()
            scaled = pixmap.scaled(size, Qt.KeepAspectRatio, Qt.SmoothTransformation)
            x = option.rect.x() + option.rect.width() / 2 - scaled.width() / 2
            y = option.rect.y() + option.rect.height() / 2 - scaled.height() / 2
            painter.drawPixmap(x, y, scaled)
        else:
            super().paint(painter, option, index)

    def sizeHint(self, option, index):
        return QSize(100, 100)  # 自定义图像尺寸

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.table_view = QTableView()
        self.setCentralWidget(self.table_view)

        data = [['image1.png'], ['image2.png'], ['image3.png']]  # 假设有一个包含图像路径的数据表

        model = CustomTableModel(data)
        self.table_view.setModel(model)
        self.table_view.setItemDelegateForColumn(0, ImageDelegate())  # 第一列显示图像

class CustomTableModel(QAbstractTableModel):
    def __init__(self, data):
        super().__init__()
        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):
        if role == Qt.DisplayRole:
            return self.data[index.row()][index.column()]
        elif role == Qt.DecorationRole:  # 图像数据角色
            return self.data[index.row()][index.column()]

    def headerData(self, section, orientation, role):
        if role == Qt.DisplayRole:
            if orientation == Qt.Horizontal:
                return f'Column {section + 1}'
            else:
                return f'Row {section + 1}'

if __name__ == '__main__':
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()