Slate Measure text wrong scale in 4k screen

Development Programming & Scripting C++
1

Hi Guys
I am a bit lost here, I am trying to mesure the text size of a custom widget I am working on, because I want to draw something else in top of it.
Apparently is not working in my 4k screen, but in a regular fullHD screen is working well, I got the right resolution.

this is the way I am using:



    FontMeasureService = FSlateApplication::Get().GetRenderer()->GetFontMeasureService();
    float LineWeight = FontMeasureService->Measure("Hello", TextStyle->Font).X;

I guess I have to divide that for some DPI scale factor, but I cannot find the thing, does someone know what’s that value?

Thanks guys

2

Yes, there is DPI scaling involved. Here is the answer hub on how to get the current DPI scale. https://answers.unrealengine.com/questions/120050/current-dpi-scaling.html

3

Hey Thanks I saw that but it did not work for me, instead I found it looking inside the code itself, finally you have to find the master SWindow for your widget like this:



TSharedPtr WidgetWindow = FSlateApplication::Get().FindWidgetWindow(this->AsShared());
    float DPIScale = 1;
    if (WidgetWindow.IsValid())
    {
        DPIScale = WidgetWindow->GetNativeWindow()->GetDPIScaleFactor();
    }

    FVector2D Position = FVector2D(OutSize.X, ((TextLocation.GetLineIndex() * LineHeight) - EditableTextLayout->GetScrollOffset().Y) + LineHeight);
    Position.X /= DPIScale;

Now I have my widget in the right position regardless of my screen size, kind of cool

I have posted here if someone is messing around with this

Cheers