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?

Hatty

For me, everything is OK. Maybe you have some problems with DPI scaling? Could you give us some code sample? – Hawthorn

Answer 1

Try add

   QAppplication::setAttribute(Qt::AA_EnableHighDpiScaling) 

to your main

Desireah

In Qt 6: main.cpp:85:36: 'AA_EnableHighDpiScaling' is deprecated: High-DPI scaling is always enabled. This attribute no longer has any effect. :449:33: note: 'AA_EnableHighDpiScaling' has been explicitly marked deprecated here – Monopolize