"""
Tweakable value widget.
Variety support pending:
- everything
"""
import logging
import qtpy
from qtpy import QtCore
from . import utils, variety
logger = logging.getLogger(__name__)
[docs]@variety.uses_key_handlers
@variety.use_for_variety_write('scalar-tweakable')
class TyphosTweakable(utils.TyphosBase):
# TODO rearrange package: widgets.TyphosDesignerMixin):
"""
Widget for a tweakable scalar.
Parameters
----------
parent : QWidget
The parent widget.
init_channel : str, optional
The channel to be used by the widget.
Notes
-----
"""
ui_template = utils.ui_dir / 'widgets' / 'tweakable.ui'
_readback_attr = 'readback'
_setpoint_attr = 'setpoint'
def __init__(self, parent=None, init_channel=None, variety_metadata=None,
ophyd_signal=None):
self._ophyd_signal = ophyd_signal
super().__init__(parent=parent)
self.ui = qtpy.uic.loadUi(str(self.ui_template), self)
self.ui.readback.channel = init_channel
self.ui.setpoint.channel = init_channel
self.ui.tweak_positive.clicked.connect(self.positive_tweak)
self.ui.tweak_negative.clicked.connect(self.negative_tweak)
self.variety_metadata = variety_metadata
variety_metadata = variety.create_variety_property()
def _update_variety_metadata(self, *, display_format=None, **kwargs):
display_format = variety.get_display_format(display_format)
self.ui.readback.displayFormat = display_format
self.ui.setpoint.displayFormat = display_format
variety._warn_unhandled_kwargs(self, kwargs)
[docs] def tweak(self, offset):
"""Tweak by the given ``offset``."""
try:
setpoint = float(self.readback.text()) + float(offset)
except Exception:
logger.exception('Tweak failed')
return
self.ui.setpoint.setText(str(setpoint))
self.ui.setpoint.send_value()
[docs] @QtCore.Slot()
def positive_tweak(self):
"""Tweak positive by the amount listed in ``ui.tweak_value``"""
try:
self.tweak(float(self.tweak_value.text()))
except Exception:
logger.exception('Tweak failed')
[docs] @QtCore.Slot()
def negative_tweak(self):
"""Tweak negative by the amount listed in ``ui.tweak_value``"""
try:
self.tweak(-float(self.tweak_value.text()))
except Exception:
logger.exception('Tweak failed')