VideoWidget

from PySide6 import QtWidgets, QtGui, QtCore


# class VideoWidget(QtOpenGLWidgets.QOpenGLWidget):
class VideoWidget(QtWidgets.QWidget):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setSizePolicy(QtWidgets.QSizePolicy.Ignored, QtWidgets.QSizePolicy.Ignored)
        # self.setAlignment(QtCore.Qt.AlignCenter)
        self.image_ = None
        self.ori_image = None

    def set_image(self, image):
        self.ori_image = image
        self.image_ = self.ori_image.scaled(self.size(), aspectMode=QtCore.Qt.AspectRatioMode.KeepAspectRatio,
                                            mode=QtCore.Qt.FastTransformation)
        self.repaint() #立刻刷新，update可能会合并

    def resizeEvent(self, event: QtGui.QResizeEvent) -> None:
        self.image_ = self.ori_image.scaled(self.size(), aspectMode=QtCore.Qt.AspectRatioMode.KeepAspectRatio,
                                            mode=QtCore.Qt.FastTransformation)
        self.update()

    def paintEvent(self, event: QtGui.QPaintEvent) -> None:
        painter = QtGui.QPainter()
        painter.begin(self)
        if self.image_ is None:
            return
        draw_rect = QtCore.QRect(0, 0, self.image_.width(), self.image_.height())
        draw_rect.moveCenter(self.rect().center())

        painter.fillRect(self.rect(), QtGui.Qt.white)
        painter.drawPixmap(draw_rect, self.image_)
        painter.end()