transparent qcombobox?

[eric_vi]

how is it possible to make the background of the dropdown list of a QComboBox semi transparent?

thank you in advance for your help

[wysota]

What did you already try?

[eric_vi]

i tried

cbox->view()->setWindowOpacity(.5);

cbox->view()->setWindowOpacity(.5);

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and also

QPalette pal = cbox->view()->palette();
pal.setBrush(QPalette::Base, Qt::transparent);  
cbox->view()->setPalette(pal);

QPalette pal = cbox->view()->palette();
pal.setBrush(QPalette::Base, Qt::transparent);  
cbox->view()->setPalette(pal);

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both does not work

[wysota]

Try using Qt::WA_TranslucentBackground.

[eric_vi]

it does not make any difference...

i am in style plastique, i got the feeling a background color is written first then the 50% opacity is added on top.. how to make sure there is no background paint on this wiget

[wysota]

You may have to provide a custom delegate to the view. One that does not paint the background or does it with translucency.