QTextEdit with semi-transparent background

[ber_44]

I have the following code to paint a semi-transparent label on an image and then write on that label:

topLabel = new QTextEdit(imageLabel); 
//   topLabel->setAttribute(Qt::WA_NoSystemBackground);
   QPalette palette;
   // a white semi-transparent background
   palette.setColor(QPalette::Window, QColor(255, 255, 255, 127));
   topLabel->setPalette(palette);
   topLabel->setText(*text);

topLabel = new QTextEdit(imageLabel); 
//   topLabel->setAttribute(Qt::WA_NoSystemBackground);
   QPalette palette;
   // a white semi-transparent background
   palette.setColor(QPalette::Window, QColor(255, 255, 255, 127));
   topLabel->setPalette(palette);
   topLabel->setText(*text);

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It creates a white, opaque background.
It topLabel is QLabel, it creates a transparent background.
In any case, it is not semi-transparent.