Use case

I'm not quite sure if this is a bug or intention but I feel the current example of RawMagnifier is not intuitive when experiencing it.

We can see two issues here:

1. The Magnifier is not moved when I trigger a pointer down (click/tap..). It only moves when I trigger pan gesture.
2. The mouse pointer is not inside Magnifier, it's always on the top left.

Proposal

This is Magnifier demo on macOS. Magnifier is always moved along with mouse pointer.

It doesn't have to be the same, but it can be seen that the mouse pointer should be in magnification area. We should solve two issues above to make RawMagnifier's example to be more intuitive.