Negative Value for minValue

[dgrochmal]

I'd like to have a negative value expressed by the speedometer.

When I try to put a negative in for minValue, I get TypeError: undefined is not an object (evaluating 'label.labelColor'). Not sure how this error applies, but I'd love the ability to have negative values.

I'm using it for device acceleration, and would like to have minValue be -25, and maxValue to be 25 in order to express both positive and negative accelerations.