QML fonts use pixelsize to adapt to the interface

Preface

Has been plagued by the problem of font adaptation , Especially in use pixelSize Unit font , Different effects will be displayed on computers with different resolutions , Some are big , Some are medium , Some thieves are small , This is because of the use of pixelSize It will cause the font to be fixed , How big is most , It won't change by itself , When it comes to high resolution, it becomes smaller , The low one is the thief , Just like the design prototype , It looks very beautiful .

While using pointSize Although it will zoom in and out by itself , But there is a big gap with the font of the design , And there will be corresponding problems , And I prefer to use pixelSize, Now that it's fixed , I can zoom in and out by myself according to the proportion , So the key point of this paper is how to obtain the zoom in and zoom out ratio , Make pixel fonts look medium good on any device ！

Ideas

To get the font scaling factor , You have to know that the width and height of the original pixels are compared with the original pixels of the current device , Get different width height ratio values , Get the minimum , This is the scaling factor , Then multiply by the current font size , You can scale the font proportionally , Of course, you can also add a scaling base factor , Initialize to 1, This needs artificial adjustment , There may be 1 Not very good. , It needs to be adjusted to 1.1 It will be better , The specific acquisition code is given below

  horizontalRatio =  Changing U