Frameless window shows wrong size and view region if adjust the system display resolution scale from initial 100% to other scale.

step1: Set system display scale to 100%.

step2: Add "setWindowFlag(Qt::FramelessWindowHint);" settings to top-level window with  QLayout (e.g Qt\Examples\Qt-x.x.x\widgets\layouts\basiclayouts)

step3: Run this application.

step4: Change system display scale option to another one.

Then the  application's UI graphics will show wrong size and view region.

(PS: It's fine if  system display scale was set other scale except 100% before run the QLayout application)