您好，我正在努力实现缩放到鼠标位置的简单图像小部件。我结合了放大/缩小摩尔点的示例？和 https://doc.qt.io/qt-5/qtwidgets-widgets-imageviewer-example.html。但是，图像未按预期缩放，比例尺也不会正确更新。这是我的代码：

import sys
from PySide6 import QtWidgets
from PySide6.QtCore import Qt
from PIL.ImageQt import ImageQt
from PySide6.QtGui import QPixmap
from PySide6.QtWidgets import QDialog, QVBoxLayout, QLabel, QScrollArea


class MyScrollArea(QScrollArea):
    def __init__(self, imageWidget):
        # initialize widget
        super().__init__()
        self.setWidget(imageWidget)
        self.myImageWidget = imageWidget
        self.oldScale = 1
        self.newScale = 1

    def wheelEvent(self, event) -> None:
        if event.angleDelta().y() < 0:
            # zoom out
            self.newScale = 0.8
        else:
            # zoom in
            self.newScale = 1.25

        # compute scrollbar positions
        scrollBarPosHorizontal = self.horizontalScrollBar().value()
        scrollBarPosVertical = self.verticalScrollBar().value()
        deltaToPos = (event.position() / self.oldScale) - (self.myImageWidget.pos() / self.oldScale)
        delta = deltaToPos * self.newScale - deltaToPos * self.oldScale

        # resize image
        self.myImageWidget.resize(self.myImageWidget.size() * self.newScale)

        # set scrollbars
        self.horizontalScrollBar().setValue(scrollBarPosHorizontal+delta.x())
        self.verticalScrollBar().setValue(scrollBarPosVertical+delta.y())

        # save old scale
        self.oldScale = self.newScale

class ImageViewer(QDialog):
    def __init__(self, img):
        # initialize widget
        super().__init__()
        self.setWindowTitle('Zoom example')
        self.imageWidget = QLabel()
        self.imageWidget.installEventFilter(self)
        self.imageWidget.setAlignment(Qt.AlignCenter)
        self.pixmap = QPixmap.fromImage(img)
        self.imageWidget.setPixmap(self.pixmap)

        # create scroll area
        self.scrollArea = MyScrollArea(self.imageWidget)

        # insert to layout
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.scrollArea)
        self.setLayout(self.layout)


if __name__ == '__main__':
    # prepare app
    app = QtWidgets.QApplication(sys.argv)

    # prepare image
    image = ImageQt("test.png")

    # create viewer widget
    MyWidget = ImageViewer(image)
    MyWidget.show()

    # close app
    sys.exit(app.exec())

图像根本不缩放到鼠标点。我做错了什么？