Qt: How to use AA_UseHighDpiPixmaps for two monitors

Question

I'm using two monitors: Retina and Normal.

I read this article http://blog.qt.io/blog/2013/04/25/retina-display-support-for-mac-os-ios-and-x11/

There are:

QIcon::pixmap() has been modified to return a larger pixmap on high-dpi systems. This is a behavior change and can break existing code, so it’s controlled by the AA_UseHighDpiPixmaps application attribute:

qApp->setAttribute(Qt::AA_UseHighDpiPixmaps);

When I set this attribute and run program with one of main monitors, all images look normal.

But if two monitors are active: images in normal monitor look terrible. Qt selects @2x images for normal monitor and resizes their.

How to solve my problem with two monitors?

Answer 1

Try add

   QAppplication::setAttribute(Qt::AA_EnableHighDpiScaling) 

to your main