Transparent background: QChartView

[fem_dev]

I would like to create a QChartView with transparent background, I mean, no white default background.

I tryed:

legendView->setWindowFlags(Qt::FramelessWindowHint);
legendView->setAttribute(Qt::WA_NoSystemBackground);
legendView->setAttribute(Qt::WA_TranslucentBackground, true);
legendView->setAttribute(Qt::WA_TransparentForMouseEvents);
legendView->setWindowOpacity(0.5);

and

chart->setContentsMargins(0, 0, 0, 0);
chart->setBackgroundRoundness(0);

But I got always the same white background.

How can I do this?

[SamurayH]

Hi,
Try using QChart::setBackgroundVisible:

chart->setBackgroundVisible(false);

[fem_dev]

@SamurayH Thank you so much! I'm looking for this line for hours in the Qt documentation...