Transparent Dialog

[wirasto]

Can I set transparent for Dialog, but not for widget ?

I tried like this, but not work.

setWindowOpacity(0.1);
m_ui->lineEdit->setWindowOpacity(1.0);

setWindowOpacity(0.1);
m_ui->lineEdit->setWindowOpacity(1.0);

To copy to clipboard, switch view to plain text mode 

[squidge]

Wouldn't that be kind of daft? Having widgets with different opacity levels than the window itself?

[aamer4yu]

You will need to play around with Qt::WA_TranslucentBackground to get that effect ( semi transparent main window and opaque child widgets)

[wirasto]

Not work Just make dialog background is black.

setWindowOpacity(0.1);
setAttribute(Qt::WA_TranslucentBackground);
 
m_ui->lineEdit->setWindowOpacity(1.0);

setWindowOpacity(0.1);
setAttribute(Qt::WA_TranslucentBackground);

m_ui->lineEdit->setWindowOpacity(1.0);

To copy to clipboard, switch view to plain text mode 

[spirit]

the doc for Qt::WA_TranslucentBackground says

Indicates that the widget should have a translucent background, i.e., any non-opaque regions of the widgets will be translucent because the widget will have an alpha channel. Setting this flag causes WA_NoSystemBackground to be set. On Windows the widget also needs the Qt::FramelessWindowHint window flag to be set. This flag is set or cleared by the widget's author.