Small resolutions problem

[rezor]

Hello, when I change window size on small resolution (e.g. 800x600), then window is rapidly moving out of screen - when I move mouse to the left by one pixel while resizing, window is significantly moving to the right, when I move mouse by 3 pixels, then window is outside of screen
I don't have any logic in resizeEvent in QMainWindow
do you know maybe what is the problem or where it might lie?

[SGaist]

Hi and welcome to devnet,

Which version of Qt are you using ?
On which OS ?
If Linux:

• Which desktop environment are you using ?
• Which window manager ?

[rezor]

I'm using QT 5.15.2
OS is Windows Server 2019 Standard

[SGaist]

Might be a silly question but do you having any zooming enabled when you have that low resolution issue ?

[rezor]

no, I don't

[SGaist]

How are you resizing your window ?

[rezor]

like normal app, I click on borders and move them
I think that I didn't mention, that on high res it works correctly, this thing happens only on lower resolutions

it looks like that, as you can see im moving mouse just by few pixels:

[SGaist]

Is it a frameless window ?

[JoeCFD]

@rezor
I guess you set
QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
on high resolutions

Did you set it back
QGuiApplication::setAttribute(Qt::AA_DisableHighDpiScaling);
on lower resolutions ?