How to make certain areas transparent with the desktop?

[laurent]

I forgot to mention that the widget you want to be translucent can't be the top widget, it has to be a child of something here is a working exemple:

m_widgetFrame= new QWidget(0, Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint);
	m_widgetFrame->setGeometry(0, 0, 100, 100);
	m_widgetFrame->setAttribute(Qt::WA_TranslucentBackground);
 
	m_widgetContent = new QWidget(m_widgetFrame);
	m_widgetContent ->setStyleSheet(QString::fromUtf8("QWidget{background-color: qlineargradient(spread:reflect, x1:0, y1:1, x2:0,y2:0,stop:0 rgba(255, 255, 255, 255),stop:1 rgba(255, 255, 255, 0));}"));
	m_widgetContent ->setGeometry(0,0,m_widgetFrame->width(),m_widgetFrame->height());
 
	m_widgetFrame->show();

m_widgetFrame= new QWidget(0, Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint);
	m_widgetFrame->setGeometry(0, 0, 100, 100);
	m_widgetFrame->setAttribute(Qt::WA_TranslucentBackground);

	m_widgetContent = new QWidget(m_widgetFrame);
	m_widgetContent ->setStyleSheet(QString::fromUtf8("QWidget{background-color: qlineargradient(spread:reflect, x1:0, y1:1, x2:0,y2:0,stop:0 rgba(255, 255, 255, 255),stop:1 rgba(255, 255, 255, 0));}"));
	m_widgetContent ->setGeometry(0,0,m_widgetFrame->width(),m_widgetFrame->height());

	m_widgetFrame->show();

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