Automatic rescaling of an application on high-dpi Windows platform?

Question

I\'m writing a Qt application that needs to run on high-dpi Windows (192dpi instead of 96dpi).

Unfortunately the Qt framework does not have support for high-dpi yet

Answer 1

Qt fully supports high DPI monitors from Qt 5.6 onward, via attribute or environment variable (except on OS X where support is native). For the attribute method, use:

#include 

int main(int argc, char *argv[])
{
    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support

    QApplication app(argc, argv);   
    return app.exec();
}

or set the system environment variable:

QT_AUTO_SCREEN_SCALE_FACTOR=1

I've tested both methods on windows 10 with a high-DPI surfacebook monitor and the results are scaled properly as expected.