def accum_update(self):
field = self._cmdp['Units/accumulator']
if self._accum_history is None:
time_str = '0 s'
units = self._cmdp.preferences.get('Units/' + field)
v = convert_units(0.0, units, units)
else:
time_str = self._accum_history['time_str']
a = self._accum_history['accumulators']
v = a[field]
units = self._cmdp.preferences.get('Units/' + field, default=v['units'])
v = convert_units(v['value'], v['units'], units)
s = three_sig_figs(v['value'], v['units'])
txt = ACCUM_TEMPLATE.format(field=field.capitalize(), value=s, time=time_str)
self._accumLabel.setText(txt)
def test_energy(self):
self.assertEqual({
'value': 1,
'units': 'J'
}, units.convert_units(1, 'J', 'J'))
self.assertEqual({
'value': 1 / 3600,
'units': 'Wh'
}, units.convert_units(1, 'J', 'Wh'))
self.assertEqual({
'value': 1,
'units': 'Wh'
}, units.convert_units(1, 'Wh', 'Wh'))
self.assertEqual({
'value': 3600,
'units': 'J'
}, units.convert_units(1, 'Wh', 'J'))
def test_charge(self):
self.assertEqual({
'value': 1,
'units': 'C'
}, units.convert_units(1, 'C', 'C'))
self.assertEqual({
'value': 1 / 3600,
'units': 'Ah'
}, units.convert_units(1, 'C', 'Ah'))
self.assertEqual({
'value': 1,
'units': 'Ah'
}, units.convert_units(1, 'Ah', 'Ah'))
self.assertEqual({
'value': 3600,
'units': 'C'
}, units.convert_units(1, 'Ah', 'C'))
def convert_units(self, field, value, units=None):
"""Convert a field value into user-configurable preferred units.
:param field: The field name, such as 'current'.
:param value: The float value to convert or the dict of
{'value': value, 'units': units}.
:param units: The units for when value is a float. Ignored
otherwise.
:return: dict of {'value': value, 'units': units}.
"""
if value is None:
value = 0.0
if units is None:
units = FIELD_UNITS_SI.get(field)
if units is None:
units = value['units']
value = value['value']
output_units = self.preferences.get('Units/' + field, default=units)
return convert_units(value, units, output_units)