[Interest] Weird sizing in Qt Designer 5.12.0 with hi-res screen

[Tony Rietwyk]

Hi Everybody,

I have recently installed a hi-res screen 3840 x 2160 @ 150% scaling on 
my Windows 10 machine.

The attached screen capture has Qt Designer on the right of the actual 
running dialog, with a screen ruler on top of the designer.  You can see 
the following:

- Designer is showing the form at double the size it should be (1200 for 
a form at minimum size 600 high).

- Even the grid spacing has been stretched.

- We do not set any of the newer high-res related settings at run time, 
so the dialog appears at the expected 600 pixels high. Instead we use 
style sheets to adjust fonts, images, etc.

Why is Designer doing this?  Where is it getting the factor of 2 from?  
How do I get it to display the form at the correct size?

Regards, Tony

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