[Bug]: Do not support fractional scaling for high-DPI monitors

[BH2WFR]

What did you do?

The GUI do not supports fractional scaling, like 150%.

fractional scaling support is available since Qt5.14，needs these codes in main function (since Qt6, codes below is not required):

    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);  
    
// fractional scaling support since Qt5.14 (needn't invoke this since Qt6)
QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
    

What did you expect to see?

The Application displays properly in 150% scaling monitor, and auto re-scale when I drag it to another monitor with different scaling.

What did you see instead?

DB4S Version

3.13.1

What OS are you seeing the problem on?

Windows

OS version

Windows 11

Relevant log output

Prevention against duplicate issues

• I have searched for similar issues

[lucydodo]

sqlitebrowser/src/main.cpp

Lines 34 to 38 in 1dc7ffe

	#ifdef Q_OS_WIN
	#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
	QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);
	#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
	QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);

That's strange—that feature is already implemented. Could there be another issue? 🤔

[BH2WFR]

strange. I tried the same latest version in another laptop, and it scaled correctly 150%. Maybe it would be my issue ...

[lucydodo]

I'm glad the problem was resolved :)