demoitem.py 文件源码

def paint(self, painter, option=None, widget=None):
        if self._validateImage():
            wasSmoothPixmapTransform = painter.testRenderHint(QPainter.SmoothPixmapTransform)
            painter.setRenderHint(QPainter.SmoothPixmapTransform)

            if Colors.noRescale:
                # Let the painter scale the image for us.  This may degrade
                # both quality and performance.
                if self._sharedImage.image is not None:
                    painter.drawImage(self.pos(), self._sharedImage.image)
                else:
                    painter.drawPixmap(self.pos(), self._sharedImage.pixmap)
            else:
                m = painter.worldTransform()
                painter.setWorldTransform(QTransform())

                x = m.dx()
                y = m.dy()
                if self.noSubPixeling:
                    x = qRound(x)
                    y = qRound(y)

                if self._sharedImage.image is not None:
                    painter.drawImage(QPointF(x, y), self._sharedImage.image)
                else:
                    painter.drawPixmap(QPointF(x, y), self._sharedImage.pixmap)

            if not wasSmoothPixmapTransform:
                painter.setRenderHint(QPainter.SmoothPixmapTransform,
                        False)