Convert to painter

[wirasto]

I tied convert this stylesheet to painter, but I'm failed.

stylesheet

"background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);"

"background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);"

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painter

QLinearGradient linearGrad(0, 0, 0, 1);
linearGrad.setColorAt(0, QColor("#e7effd"));
linearGrad.setColorAt(1, QColor("#cbdaf1"));
 
painter->fillRect(option.rect, QBrush(linearGrad));

QLinearGradient linearGrad(0, 0, 0, 1);
linearGrad.setColorAt(0, QColor("#e7effd"));
linearGrad.setColorAt(1, QColor("#cbdaf1"));

painter->fillRect(option.rect, QBrush(linearGrad));

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What is wrong ?