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Make QT Widgets semi-opaque

I am working with a QWidget elements which contains child elements, what I need is some way to make this widget semi transparent, completely, including its childs.

I have seen a method for QWidgets which is QWidget::setWindowOpacity() but this works only if the widget is a window itself, and in my case this widget is part of a layout.

The goal of all this, is me being able to make this widget fade when appearing or disappearing.

Thanks for any ideas, hopefully not making a custom widget, but if there is no more alternatives, I can do it anyway.
Sep 15 '11 #1
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