Backgound color of QWidget

[guilugi]

Yup,

You have to use QPalette now

Something like this :

QPalette *palette = your_widget->palette();
palette->setBrush(QPalette::Base, QColor(your_color));
your_widget->setPalette(palette);

QPalette *palette = your_widget->palette();
palette->setBrush(QPalette::Base, QColor(your_color));
your_widget->setPalette(palette);

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Guilugi.