Touch input at X,Y

[Tyler-Lopez]

Question

Is it possible to receive a touch input callback at a given X,Y? That would be fantastic, if so! I'm not seeing an example in the showcase.

This library does support "scrubbing" through a line chart somehow, right?

Vico version(s)

No response

UI framework(s)

Jetpack Compose

[Tyler-Lopez]

Answering myself partially in that I see how CartesianMarker fits into this.

I have a question related to this, if preferred I can make a separate thread: is it possible to show the marker at all times, even without user input? For example, I might want to always have a point in my line chart selected. It would be weird for the UI to not always have a point selected.

[Gowsky]

Hello, @Tyler-Lopez.

Is it possible to receive a touch input callback at a given X,Y?

For charts with CartesianMarkers, this can be achieved via CartesianMarkerVisibilityListener. As mentioned in previous discussions, we plan on adding a dedicated, CartesianMarker-independent API for this. In the meantime, if you need such callbacks but don't want to have a CartesianMarker, an easy workaround is to create a CartesianMarker that doesn't draw anything.

is it possible to show the marker at all times, even without user input?

Yes, it is. Please see persistentMarkers.

[Tyler-Lopez]

Hi there, thanks for the response!

This aligns with what I had found since asking this question: where my approach was to use a persistentMarker and then use a transparent non-persistent marker (because CartesianMarkerVisibilityListener depends upon the non-persistent marker - I realize you are mentioning it will be independent int he future, which is exciting!).

The "Y" bit I had mentioned I think is not achieved with your suggestion, but I think I had duplicated that part of the question elsewhere so will reply in more depth there - and apologies for that.