Show window in Qt without stealing focus

Question

I'm using the Qt library to show a slideshow on the second monitor when the user isn't using the second monitor. An example is the user playing a game in the first monitor and showing the slideshow in the second monitor.

The problem is that when I open a new window in Qt, it automatically steals the focus from the previous application. Is there any way to prevent this from happening?

Answer 1

Widgets don't accept focus by default but presumably you haven't created a plain widget? Which subclass was it? QMainWindow or something else?

It's possible the window subclasses default to accepting focus so try explicitly calling QWidget::setFocusPolicy with Qt::NoFocus before calling QWidget::show().

Also, make sure you're not calling QWidget::activateWindow() on the window or any of its widgets at any point.

Answer 2

It took me a while to find it but I found it: setAttribute(Qt::WA_ShowWithoutActivating);

This forces the window not to activate. Even with the Qt::WindowStaysOnTopHint flag