How to work in portrait mode

[HelenXR]

This Application work fine in my monitor(1366x768) which is in landscape mode.
But My HMD devices is 1440x2560 which is in portrait mode, I need to rotate the View .
I want to find some api to do this under Class QMainWindow & QWidget ,But I don't find ,give me a hand,thanks.

[russell-taylor]

The application does not have a portrait mode. However, in Windows you can rotate the display within the OS so that it shows in landscape mode and run the program in that configuration. The resulting parameters will work for a RenderManager context that is in portrait mode, it is only the distortionizer than should need to be run in landscape.