problem in painter fillRect

[wagmare]

hi friends,
normally using fillRect() we will fill the entire rect with some color ..
but if i want to fill RoundRect .. how can i use fillRect ..
my code

QRectF rect1(0, 0, 100, 50);
                QRectF rect2(5, 5, 90, 40);
                painter->setPen(QColor(160, 160, 160));
                painter->setBrush(QColor(104, 104, 104));
                painter->drawRoundRect(rect1);
                painter->drawRoundRect(rect2);
                painter->fillRect(7, 7, 86, 36, QColor(51, 51, 51));

QRectF rect1(0, 0, 100, 50);
                QRectF rect2(5, 5, 90, 40);
                painter->setPen(QColor(160, 160, 160));
                painter->setBrush(QColor(104, 104, 104));
                painter->drawRoundRect(rect1);
                painter->drawRoundRect(rect2);
                painter->fillRect(7, 7, 86, 36, QColor(51, 51, 51));

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but it showing a box inside the rect2 . how can i fill the entire rect2 with QColor ...

currently i change my code as

QRectF rect1(0, 0, 100, 50);
                QRectF rect2(5, 5, 90, 40);
                painter->setPen(QColor(160, 160, 160));
                painter->setBrush(QColor(104, 104, 104));
                painter->drawRoundRect(rect1);
                painter->setBrush(QColor(51, 51, 51));
                painter->drawRoundRect(rect2);

QRectF rect1(0, 0, 100, 50);
                QRectF rect2(5, 5, 90, 40);
                painter->setPen(QColor(160, 160, 160));
                painter->setBrush(QColor(104, 104, 104));
                painter->drawRoundRect(rect1);
                painter->setBrush(QColor(51, 51, 51));
                painter->drawRoundRect(rect2);

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