set Scale
Sets value to the scale picker.
Parameters
scale
The Scale to be set.
notify Listeners
If scale has changed, this sets whether or not to notify the external ScalePickerListener about the change.
update Calibration
Whether or not to update the calibration on scale change. This should be set to false
when the scale is being set by calibration, true
in all other circumstances. Calibration is only relevant for distance (line) measurements.