graphicseffects.py 文件源码

def draw(self, painter: QPainter) -> None:
        if self.sourceIsPixmap():
            pixmap, offset = self.sourcePixmap(Qt.LogicalCoordinates, QGraphicsEffect.PadToEffectiveBoundingRect)
        else:
            pixmap, offset = self.sourcePixmap(Qt.DeviceCoordinates, QGraphicsEffect.PadToEffectiveBoundingRect)
            painter.setWorldTransform(QTransform())
        painter.setBrush(Qt.black)
        painter.drawRect(pixmap.rect())
        painter.setOpacity(self.opacity)
        painter.drawPixmap(offset, pixmap)