Are there zoom or scroll callbacks?

[jrmoulton]

I can see that some views like ScrollView can be scrolled but do those views have associated callbacks for scrolling and or zooming?
Is there any way to have a callback for when a zoom happens on a touchpad for example?

[ogoffart]

Currently, the lower API that does scrolling is the Flickable.

We don't expose public api for zooming yet.

What use case do you have in mind?

[jrmoulton]

I'm building a document viewer for markdown files and I was trying to build in the ability to zoom by pinching.

[CRogers]

I would also like a way to zoom or easily scale a bunch of subcomponents. I'm starting out building a circuit designer (for simple stuff like AND/OR gates) and being able to zoom in/out (and likely pan) the whole set of gates and connections would be great (rather than having to manually move/scale all the components myself).