class GphlSetupWidget(QtGui.QWidget):
"""Superclass for GPhL interface widgets"""
def __init__(self, parent=None, name='gphl_setup_widget'):
QtGui.QWidget.__init__(self,parent)
if name is not None:
self.setObjectName(name)
# Properties ----------------------------------------------------------
# Signals ------------------------------------------------------------
# Slots ---------------------------------------------------------------
dispatcher.connect(self._refresh_interface, 'model_update',
dispatcher.Any)
# Hardware objects ----------------------------------------------------
# Internal variables -------------------------------------------------
self._widget_data = OrderedDict()
self._data_object = GphlAcquisitionData()
self._pulldowns = {}
self._parameter_mib = DataModelInputBinder(self._data_object)
# Graphic elements ----------------------------------------------------
_parameters_widget = self._parameters_widget = QtGui.QWidget(self)
QtGui.QGridLayout(_parameters_widget)
_parameters_widget.layout().setColumnStretch(2, 1)
# Layout --------------------------------------------------------------
# This seems to be necessary to make widget visible
_main_vlayout = QtGui.QVBoxLayout(self)
_main_vlayout.addWidget(_parameters_widget)
_main_vlayout.setSpacing(0)
_main_vlayout.setContentsMargins(0, 0, 0, 0)
def setEnabled(self, value):
super(GphlSetupWidget, self).setEnabled(value)
for tag in self._widget_data:
self.set_parameter_enabled(tag, value, warn=False)
def set_parameter_enabled(self, tag, value, warn=True):
tt = self._widget_data.get(tag)
if tt:
if hasattr(tt[0], 'setEnabled'):
tt[0].setEnabled(value)
elif warn:
logging.getLogger().warning(
"%s Widget has no attribute setEnabled" % tag
)
elif warn:
logging.getLogger().warning(
"%s field not found in GphlSetupWidget" % tag
)
def get_data_object(self):
return self._data_object
def populate_widget(self, **kw):
self._data_object = data_object = GphlAcquisitionData()
self._parameter_mib.bindings.clear()
# NB must be done here to set empty model, and also in subclasses:
self._parameter_mib.set_model(data_object)
for field_name, tags in self._pulldowns.items():
widget = self._widget_data[field_name][0]
widget.clear()
widget.addItems(list(QtCore.QString(tag) for tag in tags))
widget.setCurrentIndex(0)
def set_parameter_value(self, name, value):
"""Set value - NB ComboBoxes are set by text, not index"""
if hasattr(self._data_object, name):
tags = self._pulldowns.get(name)
if tags is None:
# Not a pulldown
setattr(self._data_object, name, value)
else:
# This is a pulldown
if value in tags:
indx = tags.index(value)
setattr(self._data_object, name, indx)
else:
raise ValueError(
"GPhL acquisition widget %s pulldown has no value %s"
% (name, value)
)
self._parameter_mib._update_widget(name, None)
else:
raise ValueError(
"GPhL acquisition widget has no parameter named %s" % name
)
def get_parameter_value(self, name):
"""Return value of parameter <name> or None if it does not exist
NB ComboBoxes return text values, not indices
NB, the attributes defined on the _data_object depend on context,
so it is practical not to get errors for unknown names """
if hasattr(self._data_object, name):
tags = self._pulldowns.get(name)
if tags is None:
# Not a pulldown
return getattr(self._data_object, name)
else:
# This is a pulldown - get text from index
return tags[getattr(self._data_object, name)]
else:
return None
def _get_label_name(self, name):
return name + '_label'
def _refresh_interface(self, field_name, data_binder):
"""Refresh interface when values change"""
pass
