MouseEvent has a reference to a MouseInputSource. Is it okay to grab a pointer to that reference, and use it later? What are the lifetime rules for MouseInputSource (if any)?
Yeah, they hang around for the whole runtime. Might even be static objects, depending on the OS.
How do you actually get a consistent pointer to a MouseInputSource? I’m trying to use this to identify different touches, but I get a different address for mouseDown than for mouseDrag for example.