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

I' am using Qt 4.8.7. This is my code.

static float dpiX = (float)0;
inline int autoDpiSize(int inSize)
{
    if (dpiX == (float)0)
    {
        HDC screen = GetDC(0);
        dpiX = static_cast(GetDeviceCaps(screen, LOGPIXELSX)) / 96.0;
        ReleaseDC(0, screen);
    }
    return dpiX * inSize;
}
someWidget->setFixedHeight(autoDpiSize(30));