from qtpy.QtWidgets import QLabel
from qtpy.QtCore import Property, Q_ENUMS
from qtpyvcp import hal
from qtpyvcp.widgets import HALWidget
from . import HalType
# Setup logging
from qtpyvcp.utilities.logger import getLogger
LOG = getLogger(__name__)
[docs]class HalLabel(QLabel, HALWidget, HalType):
"""HAL Label
Label for displaying HAL pin values.
Input pin type is selectable via the :class:`.pinType` property in designer,
and can be any valid HAL type (bit, u32, s32, float).
The text format can be specified via the :class:`.textFormat` property in
designer and can be any valid python style format string.
.. table:: Generated HAL Pins
========================= =========== =========
HAL Pin Name Type Direction
========================= =========== =========
qtpyvcp.label.enable bit in
qtpyvcp.label.in selecatable in
========================= =========== =========
"""
Q_ENUMS(HalType)
def __init__(self, parent=None):
super(HalLabel, self).__init__(parent)
self._in_pin = None
self._enable_pin = None
self._typ = "float"
self._fmt = ".2f"
self._value = 0
self.setValue(0)
def setValue(self, value):
self._value = value
try:
self.setText(f"{value:{self._fmt}}")
except Exception as e:
self.setText(f"ERR: {self._fmt}")
LOG.warning("Invalid format specified")
@Property(str)
def textFormat(self):
"""Text Format Property
Args:
fmt (str) : A valid python style format string. Defaults to ``%s``.
"""
return self._fmt
@textFormat.setter
def textFormat(self, fmt):
self._fmt = fmt
self.setValue(self._value)
@Property(HalType)
def pinType(self):
return getattr(HalType, self._typ)
@pinType.setter
def pinType(self, typ_enum):
self._typ = HalType.toString(typ_enum)
try:
val = {'bit': False, 'u32': 0, 's32': 0, 'float': 0.0}[self._typ]
self.setValue(val)
except Exception as ex:
LOG.debug(ex)
[docs] def initialize(self):
comp = hal.getComponent()
obj_name = self.getPinBaseName()
# add label.enable HAL pin
self._enable_pin = comp.addPin(f"{obj_name}.enable", "bit", "in")
self._enable_pin.value = self.isEnabled()
self._enable_pin.valueChanged.connect(self.setEnabled)
# add label.in HAL pin
self._in_pin = comp.addPin(f"{obj_name}.in", self._typ, "in")
self.setValue(self._in_pin.value)
self._in_pin.valueChanged.connect(self.setValue)