In our use case, we have linear gauges that show different colours depending on the time of day.

Our users need to be able to move the pointer up and down to view the corresponding values. 

As you can see in the below image, currently we have a workaround to show a slider above it and then move the pointer up and down accordingly, as the slider is moved. However, this does not always work perfectly, and sometimes the slider doesn't line up.

It would be nice if there were an option on the linear gauge to make the pointer moveable (false by default) and then also have corresponding events e.g. when the movement starts/stops.