graphmodel value_min should support negative values
using libdazzle 3.34.1, i am currenty trying to take the graphview-related components for a ride to display several measurement values. one of these values is voltages over time that can become negative and another is temperature which can become negative, too. when i try to set GraphModel.value_min to below zero, i receive a warning.
(graph:663882): GLib-GObject-WARNING **: 14:43:00.995: value "-27638.000000" of type 'gdouble' is invalid or out of range for property 'value-min' of type 'gdouble'
i can indeed circumvent the problem by adding a correctional value to my whole dataset and correct each value, so that the lowest value is 0 each time a new minimal value drops into my series of measurements but that implies iterating over the whole graphmodel to apply the new correctional value to each datapoint which is very inefficient. in order for graphview to be more versatile besides cpu- and memory graphs it would be very nice to have negative values allowed.