def create_listeners(self, attr_name, attr_info_list):
self.info_stream("Creating Listeners ...")
attr_to_proxy = attr_info_list[0]
full_attr_to_proxy = self.LlrfDevice + '/' + attr_to_proxy
taurus_attr = Attribute(full_attr_to_proxy)
if len(attr_info_list) == 2:
r_method = attr_info_list[1]
self.dyn_attrs_dict[attr_name] = (taurus_attr, r_method)
elif len(attr_info_list) == 3:
r_method, w_method = attr_info_list[1::]
self.dyn_attrs_dict[attr_name] = (taurus_attr, r_method, w_method)
self.info_stream('w_method = %s' % w_method)
self.info_stream('r_method = %s' % r_method)
listener_name = attr_name + 'Listener'
self.__dict__[listener_name] = taurus.core.TaurusListener(None)
self.__dict__[listener_name].eventReceived = lambda a, b, c: self._dyn_attr_event_received(a,
self.__dict__[listener_name],
c,
attr_name,
r_method )
taurus_attr.addListener(self.__dict__[listener_name])
self.info_stream('attr_to_proxy = %s' % attr_to_proxy)
def onSelectionChanged(self, models):
if self._oldModels in [None, []]:
for model in models:
attr = Attribute(model)
#force a read -> attr.read()
attr.addListener(self)
self._oldModels = models
else:
keptModels = []
newModels = []
for model in models:
if model in self._oldModels:
keptModels.append(model)
else:
newModels.append(model)
for model in self._oldModels:
if model not in newModels:
attr = Attribute(model)
attr.removeListener(self)
legend = attr.getNormalName()
print("Trying to remove ", legend)
self.removeCurve(legend, replot=False)
for model in newModels:
attr = Attribute(model)
# attr.read()
attr.addListener(self)
self._oldModels = keptModels + newModels
class StatusArea(TaurusWidget):
"""A (scrolling) text area that displays device status, or any other
string attribute."""
statusTrigger = QtCore.pyqtSignal(str)
def __init__(self, parent=None, down_command=None, up_command=None, state=None):
TaurusWidget.__init__(self, parent)
self._setup_ui()
def _setup_ui(self):
hbox = QtGui.QVBoxLayout(self)
self.setLayout(hbox)
self.status_label = QtGui.QLabel("(No status has been read.)")
self.status_label.setTextInteractionFlags(QtCore.Qt.TextSelectableByMouse)
self.status_label.setWordWrap(True)
self.status_label.setAlignment(QtCore.Qt.AlignTop)
status_scroll_area = QtGui.QScrollArea()
status_scroll_area.setMaximumSize(QtCore.QSize(100000, 100))
status_scroll_area.setWidgetResizable(True)
status_scroll_area.setWidget(self.status_label)
hbox.addWidget(status_scroll_area)
self.status = None
self.statusTrigger.connect(self.updateStatus)
def setModel(self, model):
if model:
split_model = model.split("/")
if len(split_model) < 4:
self.status = Attribute("%s/Status" % model)
else:
self.status = Attribute(model)
self.status.addListener(self.onStatusChange)
else:
self.status and self.status.removeListener(self.onStatusChange)
def onStatusChange(self, evt_src, evt_type, evt_value):
if evt_type in [PyTango.EventType.CHANGE_EVENT,
PyTango.EventType.PERIODIC_EVENT]:
self.statusTrigger.emit(evt_value.value)
def updateStatus(self, status):
self.status_label.setText(status)
class TaurusWebAttribute(object):
def __init__(self, name, keeper):
self.name = name
self.keepers = [keeper]
self._last_time = 0
self.last_value_event = None
self.last_config_event = None
self.attribute = Attribute(self.name)
self.attribute.addListener(self)
def eventReceived(self, evt_src, evt_type, evt_value):
# print(evt_value)
if evt_type == TaurusEventType.Error:
action = "ERROR"
value = error_str(evt_value)
else:
if evt_type == TaurusEventType.Config:
action = "CONFIG"
value = format_config_event(evt_src)
self.last_config_event = value
else:
self._last_time = evt_value.time.tv_sec
action = "CHANGE"
value = format_value_event(evt_value)
self.last_value_event = value
# self.callback(self.name, {"type": action, "data": {self.name: value}})
# event = {"type": action, "data": value}
try:
for keeper in self.keepers:
keeper.put(self.name, action, value)
except QueueFull:
print("Queue full!")
# print(event)
def addKeeper(self, keeper):
self.keepers.append(keeper)
def removeKeeper(self, keeper):
self.keepers.remove(keeper)
def clear(self):
self.attribute.removeListener(self)
def onSelectionChanged(self, models):
if self._oldModels in [None, []]:
self._attrDict = {}
for model in models:
try:
attr = Attribute(model)
except:
# old PyTango versions do not handle unicode
attr = Attribute(str(model))
#force a read -> attr.read()
attr.addListener(self)
legend = qt.safe_str(attr.getNormalName())
self._attrDict[legend] = attr
self._oldModels = models
else:
keptModels = []
newModels = []
for model in models:
if model in self._oldModels:
keptModels.append(model)
else:
newModels.append(model)
for model in self._oldModels:
if model not in keptModels:
attr = Attribute(model)
attr.removeListener(self)
legend = qt.safe_str(attr.getNormalName())
if legend in self._attrDict:
del self._attrDict[legend]
print("Trying to remove ", legend)
self.removeCurve(legend, replot=False)
for model in newModels:
attr = Attribute(model)
# attr.read()
attr.addListener(self)
legend = qt.safe_str(attr.getNormalName())
self._attrDict[legend] = attr
self._oldModels = keptModels + newModels
def onSelectionChanged(self, models):
if self._oldModels in [None, []]:
self._attrDict = {}
for model in models:
try:
attr = Attribute(model)
except:
# old PyTango versions do not handle unicode
attr = Attribute(str(model))
#force a read -> attr.read()
attr.addListener(self)
legend = qt.safe_str(attr.getNormalName())
self._attrDict[legend] = attr
self._oldModels = models
else:
keptModels = []
newModels = []
for model in models:
if model in self._oldModels:
keptModels.append(model)
else:
newModels.append(model)
for model in self._oldModels:
if model not in keptModels:
attr = Attribute(model)
attr.removeListener(self)
legend = qt.safe_str(attr.getNormalName())
if legend in self._attrDict:
del self._attrDict[legend]
print("Trying to remove ", legend)
self.removeCurve(legend, replot=False)
for model in newModels:
attr = Attribute(model)
# attr.read()
attr.addListener(self)
legend = qt.safe_str(attr.getNormalName())
self._attrDict[legend] = attr
self._oldModels = keptModels + newModels
class SardanaChannel(ChannelObject, SardanaObject):
def __init__(self,
name,
attribute_name,
username=None,
uribase=None,
polling=None,
**kwargs):
super(SardanaChannel, self).__init__(name, username, **kwargs)
class ChannelInfo(object):
def __init__(self):
super(ChannelInfo, self).__init__()
self.attributeName = attribute_name
self.model = os.path.join(uribase, attribute_name)
self.attribute = None
self.value = None
self.polling = polling
self.info = ChannelInfo()
self.info.minval = None
self.info.maxval = None
self.init_device()
def init_device(self):
try:
self.attribute = Attribute(self.model)
#
# DIRTY FIX to make compatible taurus listeners and existence of Tango channels/commands
# as defined in Command/Tango.py
#
# if self.attribute.__class__ == taurus.core.tango.tangoattribute.TangoAttribute:
# dev = self.attribute.getParentObj()
# dp = dev.getHWObj()
# try:
# dp.subscribe_event = dp._subscribe_event
# except AttributeError:
# pass
# logging.getLogger("HWR").debug("initialized")
except DevFailed as traceback:
self.imported = False
return
# read information
try:
if taurus.Release.version_info[0] == 3:
ranges = self.attribute.getConfig().getRanges()
if ranges is not None and ranges[0] != "Not specified":
self.info.minval = float(ranges[0])
if ranges is not None and ranges[-1] != "Not specified":
self.info.maxval = float(ranges[-1])
elif taurus.Release.version_info[0] > 3: # taurus 4 and beyond
minval, maxval = self.attribute.ranges()
self.info.minval = minval.magnitude
self.info.maxval = maxval.magnitude
except BaseException:
import traceback
logging.getLogger("HWR").info(
"info initialized. Cannot get limits")
logging.getLogger("HWR").info("%s" % traceback.format_exc())
# prepare polling
# if the polling value is a number set it as the taurus polling period
if self.polling:
if isinstance(self.polling, types.IntType):
self.attribute.changePollingPeriod(self.polling)
self.attribute.addListener(self.objectListener)
def getValue(self):
return self._readValue()
def setValue(self, newValue):
self._writeValue(newValue)
def _writeValue(self, newValue):
self.attribute.write(newValue)
def _readValue(self):
value = self.attribute.read().value
return value
def getInfo(self):
try:
b = dir(self.attribute)
self.info.minval, self.info.maxval = (
self.attribute._TangoAttribute__attr_config.getLimits())
except BaseException:
import traceback
logging.getLogger("HWR").info("%s" % traceback.format_exc())
return self.info
def update(self, event):
data = event.event[2]
try:
newvalue = data.value
if newvalue is None:
newvalue = self.getValue()
if isinstance(newvalue, types.TupleType):
newvalue = list(newvalue)
self.value = newvalue
self.emit("update", self.value)
except AttributeError:
# No value in data... this is probably a connection error
pass
def isConnected(self):
return self.attribute is not None
def channelListener(self, *args):
ev = AttributeEvent(args)
SardanaChannel._eventReceivers[id(ev)] = saferef.safe_ref(self.update)
SardanaChannel._eventsQueue.put(ev)
SardanaChannel._eventsProcessingTimer.send()
class SardanaChannel(ChannelObject, SardanaObject):
def __init__(self, name, attribute_name, username=None, uribase = None, polling=None, **kwargs):
super(SardanaChannel, self).__init__(name,username,**kwargs)
class ChannelInfo(object):
def __init__(self):
super(ChannelInfo, self).__init__()
self.attributeName = attribute_name
self.model = os.path.join( uribase, attribute_name )
self.attribute = None
self.value = None
self.polling = polling
self.info = ChannelInfo()
self.info.minval = None
self.info.maxval = None
logging.getLogger("HWR").debug("creating Sardana model %s, polling=%s", self.model, polling)
self.init_device()
def init_device(self):
try:
self.attribute = Attribute(self.model)
#
# DIRTY FIX to make compatible taurus listeners and existence of Tango channels/commands
# as defined in Command/Tango.py
#
#if self.attribute.__class__ == taurus.core.tango.tangoattribute.TangoAttribute:
# dev = self.attribute.getParentObj()
# dp = dev.getHWObj()
# try:
# dp.subscribe_event = dp._subscribe_event
# except AttributeError:
# pass
logging.getLogger("HWR").info("initialized")
except DevFailed as traceback:
self.imported = False
return
# read information
try:
self.info.minval, self.info.maxval = self.attribute._TangoAttribute__attr_config.getLimits()
logging.getLogger("HWR").info("info initialized. Got minval=%s, maxval=%s" %(self.info.minval, self.info.maxval))
except:
logging.getLogger("HWR").info("info initialized. Cannot get limits")
# prepare polling
# if the polling value is a number set it as the taurus polling period
if self.polling:
if type(self.polling) == int:
self.attribute.changePollingPeriod(self.polling)
self.attribute.addListener(self.objectListener)
def getValue(self):
return self._readValue()
def setValue(self, newValue, wait=False):
self._writeValue(newValue)
def _writeValue(self, newValue):
self.attribute.write(newValue)
def _readValue(self):
value = self.attribute.read().value
return value
def getInfo(self):
return self.info
def update(self, event):
data = event.event[2]
try:
newvalue = data.value
if newvalue == None:
newvalue = self.getValue()
if type(newvalue) == tuple:
newvalue = list(newvalue)
self.value = newvalue
self.emit('update', self.value)
except AttributeError:
# No value in data... this is probably a connection error
pass
def isConnected(self):
return self.attribute is not None
def channelListener(self,*args):
ev = AttributeEvent(args)
SardanaChannel._eventReceivers[id(ev)] = saferef.safe_ref(self.update)
SardanaChannel._eventsQueue.put(ev)
SardanaChannel._eventsProcessingTimer.send()
class TaurusPlotDataItem(PlotDataItem, TaurusBaseComponent):
"""A taurus-ified PlotDataItem"""
def __init__(self, *args, **kwargs):
"""
Accepts same args and kwargs as PlotDataItem, plus:
:param xModel: (str) Taurus model name for abscissas values.
Default=None
:param yModel: (str) Taurus model name for ordinate values.
Default=None
"""
xModel = kwargs.pop('xModel', None)
yModel = kwargs.pop('yModel', None)
PlotDataItem.__init__(self, *args, **kwargs)
TaurusBaseComponent.__init__(self, 'TaurusBaseComponent')
self._x = None
self._y = None
self.xModel = None
if xModel is not None:
self.setXModel(xModel)
if yModel is not None:
self.setModel(yModel)
self.registerConfigProperty(self.getOpts, self.setOpts, 'opts')
self.setModelInConfig(True)
self.registerConfigProperty(self.getXModelName, self.setXModel,
'XModel')
def setXModel(self, xModel):
if not xModel:
if self.xModel is not None:
self.xModel.removeListener(self)
self.xModel = None
return
self.xModel = Attribute(xModel)
self._x = self.xModel.read().rvalue
self.xModel.addListener(self)
def getXModelName(self):
if self.xModel is None:
return None
else:
return self.xModel.getFullName()
def handleEvent(self, evt_src, evt_type, evt_value):
if evt_type not in (TaurusEventType.Change, TaurusEventType.Periodic):
return
yModel = self.getModelObj()
if yModel == evt_src and yModel is not None:
self._y = evt_value.rvalue
if self.xModel == evt_src and self.xModel is not None:
self._x = evt_value.rvalue
self.setData(x=self._x, y=self._y)
def getOpts(self):
from taurus.qt.qtgui.tpg import serialize_opts
return serialize_opts(copy.copy(self.opts))
def setOpts(self, opts):
# creates QPainters (QPen or QBrush) from a pickle loaded file
# for adapt the serialized objects into PlotDataItem properties
from taurus.qt.qtgui.tpg import deserialize_opts
self.opts = deserialize_opts(opts)
# This is a workaround for the following pyqtgraph's bug:
# https://github.com/pyqtgraph/pyqtgraph/issues/531
if opts['connect'] == 'all':
self.opts['connect'] = 'all'
elif opts['connect'] == 'pairs':
self.opts['connect'] = 'pairs'
elif opts['connect'] == 'finite':
self.opts['connect'] = 'finite'
def getFullModelNames(self):
return (self.getXModelName(), self.getFullModelName())
class SardanaChannel(ChannelObject, SardanaObject):
def __init__(
self, name, attribute_name, username=None, uribase=None, polling=None, **kwargs
):
super(SardanaChannel, self).__init__(name, username, **kwargs)
class ChannelInfo(object):
def __init__(self):
super(ChannelInfo, self).__init__()
self.attributeName = attribute_name
self.model = os.path.join(uribase, attribute_name)
self.attribute = None
self.value = None
self.polling = polling
self.info = ChannelInfo()
self.info.minval = None
self.info.maxval = None
self.init_device()
def init_device(self):
try:
self.attribute = Attribute(self.model)
#
# DIRTY FIX to make compatible taurus listeners and existence of Tango channels/commands
# as defined in Command/Tango.py
#
# if self.attribute.__class__ == taurus.core.tango.tangoattribute.TangoAttribute:
# dev = self.attribute.getParentObj()
# dp = dev.getHWObj()
# try:
# dp.subscribe_event = dp._subscribe_event
# except AttributeError:
# pass
# logging.getLogger("HWR").debug("initialized")
except DevFailed as traceback:
self.imported = False
return
# read information
try:
if taurus.Release.version_info[0] == 3:
ranges = self.attribute.getConfig().getRanges()
if ranges is not None and ranges[0] != "Not specified":
self.info.minval = float(ranges[0])
if ranges is not None and ranges[-1] != "Not specified":
self.info.maxval = float(ranges[-1])
elif taurus.Release.version_info[0] > 3: # taurus 4 and beyond
minval, maxval = self.attribute.ranges()
self.info.minval = minval.magnitude
self.info.maxval = maxval.magnitude
except BaseException:
import traceback
logging.getLogger("HWR").info("info initialized. Cannot get limits")
logging.getLogger("HWR").info("%s" % traceback.format_exc())
# prepare polling
# if the polling value is a number set it as the taurus polling period
if self.polling:
if isinstance(self.polling, types.IntType):
self.attribute.changePollingPeriod(self.polling)
self.attribute.addListener(self.objectListener)
def getValue(self):
return self._readValue()
def setValue(self, newValue):
self._writeValue(newValue)
def _writeValue(self, newValue):
self.attribute.write(newValue)
def _readValue(self):
value = self.attribute.read().value
return value
def getInfo(self):
try:
b = dir(self.attribute)
self.info.minval, self.info.maxval = (
self.attribute._TangoAttribute__attr_config.getLimits()
)
except BaseException:
import traceback
logging.getLogger("HWR").info("%s" % traceback.format_exc())
return self.info
def update(self, event):
data = event.event[2]
try:
newvalue = data.value
if newvalue is None:
newvalue = self.getValue()
if isinstance(newvalue, types.TupleType):
newvalue = list(newvalue)
self.value = newvalue
self.emit("update", self.value)
except AttributeError:
# No value in data... this is probably a connection error
pass
def isConnected(self):
return self.attribute is not None
def channelListener(self, *args):
ev = AttributeEvent(args)
SardanaChannel._eventReceivers[id(ev)] = saferef.safe_ref(self.update)
SardanaChannel._eventsQueue.put(ev)
SardanaChannel._eventsProcessingTimer.send()
class TaurusPlotDataItem(PlotDataItem, TaurusBaseComponent):
"""A taurus-ified PlotDataItem"""
def __init__(self, *args, **kwargs):
"""
Accepts same args and kwargs as PlotDataItem, plus:
:param xModel: (str) Taurus model name for abscissas values.
Default=None
:param yModel: (str) Taurus model name for ordinate values.
Default=None
:param colors: (generator) An infinite generator of QColor objects
"""
xModel = kwargs.pop("xModel", None)
yModel = kwargs.pop("yModel", None)
colors = kwargs.pop("colors", LoopList(CURVE_COLORS))
if "pen" not in kwargs:
kwargs["pen"] = next(colors)
PlotDataItem.__init__(self, *args, **kwargs)
TaurusBaseComponent.__init__(self, "TaurusBaseComponent")
self._x = None
self._y = None
self.xModel = None
if xModel is not None:
self.setXModel(xModel)
if yModel is not None:
self.setModel(yModel)
self.registerConfigProperty(self.getOpts, self.setOpts, "opts")
self.setModelInConfig(True)
self.registerConfigProperty(
self.getXModelName, self.setXModel, "XModel"
)
def setXModel(self, xModel):
if self.xModel is not None:
self.xModel.removeListener(self)
if not xModel:
self.xModel = None
return
self.xModel = Attribute(xModel)
self.xModel.addListener(self)
def getXModelName(self):
if self.xModel is None:
return None
else:
return self.xModel.getFullName()
def handleEvent(self, evt_src, evt_type, evt_value):
if evt_type not in (TaurusEventType.Change, TaurusEventType.Periodic):
return
yModel = self.getModelObj()
if yModel == evt_src:
if yModel is not None:
self._y = evt_value.rvalue
else:
self._y = None
if self.xModel == evt_src:
if self.xModel is not None:
self._x = evt_value.rvalue
else:
self._x = None
try:
self.setData(x=self._x, y=self._y)
except Exception as e:
self.debug("Could not set data. Reason: %r", e)
def getOpts(self):
from taurus_pyqtgraph import serialize_opts
return serialize_opts(copy.copy(self.opts))
def setOpts(self, opts):
# creates QPainters (QPen or QBrush) from a pickle loaded file
# for adapt the serialized objects into PlotDataItem properties
from taurus_pyqtgraph import deserialize_opts
self.opts = deserialize_opts(opts)
# This is a workaround for the following pyqtgraph's bug:
# https://github.com/pyqtgraph/pyqtgraph/issues/531
if opts["connect"] == "all":
self.opts["connect"] = "all"
elif opts["connect"] == "pairs":
self.opts["connect"] = "pairs"
elif opts["connect"] == "finite":
self.opts["connect"] = "finite"
def getFullModelNames(self):
return (self.getXModelName(), self.getFullModelName())
class TaurusAttribute(object):
"""This object is a listener for the taurus attribute value.
When a attribute changes it sends an event. The event
triggers a call to *eventReceived*. *eventReceived* will transform
the change event into a JSON encoded string and sends this
string through the web socket to the client"""
def __init__(self, name, callback):
print self.__class__.__name__, name
self.name = name
self.callback = callback
self._last_time = 0
self.last_value_event = None
self.last_config_event = None
self.attribute = Attribute(self.name)
self.attribute.addListener(self)
def eventReceived(self, evt_src, evt_type, evt_value):
"""Transforms the event into a JSON encoded string and sends this
string into the web socket"""
modelObj = evt_src
data = {}
if evt_type == TaurusEventType.Error:
data["event_type"] = "error"
data["error"] = error_str(evt_value)
else:
if evt_type == TaurusEventType.Config:
modelObj = evt_src.getParentObj()
data['event_type'] = "config"
data['description'] = evt_src.description
data['label'] = evt_src.label
data[
"unit"] = evt_src.unit if evt_src.unit != "No unit" else ""
data["format"] = evt_src.format
self.last_config_event = data
else:
self._last_time = evt_value.time.tv_sec
data["event_type"] = "value"
value = evt_value.value
quality = evt_value.quality
fmt = evt_value.data_format
if fmt == DataFormat._0D:
html = modelObj.displayValue(value)
if isinstance(value, PyTango._PyTango.DevState):
value = value.name
if isinstance(value, str):
html = value.replace("\n", "<br>")
elif fmt in (DataFormat._1D, DataFormat._2D):
# bad, very bad performance! Don't worry for now
value = value.tolist()
html = "[...]"
data['value'] = value
data['html'] = html
data['quality'] = str(quality)
data['time'] = evt_value.time.tv_sec
data['type'] = str(evt_value.type) # can this change..?
self.last_value_event = data
data['model'] = modelObj.getNormalName()
self.write_message(data)
def write_message(self, message):
self.callback(message)
def clear(self):
try:
print "clear", self.attribute
self.attribute.removeListener(self)
del self.attribute
except PyTango.DevFailed as e:
print >> sys.stderr, "Could not unsubscribe %s: %r" % (self.name,
e)
class TaurusAttribute(object):
"""This object is a listener for the taurus attribute value.
When a attribute changes it sends an event. The event
triggers a call to *eventReceived*. *eventReceived* will transform
the change event into a JSON encoded string and sends this
string through the web socket to the client"""
def __init__(self, name, callback):
print self.__class__.__name__, name
self.name = name
self.callback = callback
self._last_time = 0
self.last_value_event = None
self.last_config_event = None
self.attribute = Attribute(self.name)
self.attribute.addListener(self)
def eventReceived(self, evt_src, evt_type, evt_value):
"""Transforms the event into a JSON encoded string and sends this
string into the web socket"""
modelObj = evt_src
data = {}
if evt_type == TaurusEventType.Error:
data["event_type"] = "error"
data["error"] = error_str(evt_value)
else:
if evt_type == TaurusEventType.Config:
modelObj = evt_src.getParentObj()
data['event_type'] = "config"
data['description'] = evt_src.description
data['label'] = evt_src.label
data["unit"] = evt_src.unit if evt_src.unit != "No unit" else ""
data["format"] = evt_src.format
self.last_config_event = data
else:
self._last_time = evt_value.time.tv_sec
data["event_type"] = "value"
value = evt_value.value
quality = evt_value.quality
fmt = evt_value.data_format
if fmt == DataFormat._0D:
html = modelObj.displayValue(value)
if isinstance(value, PyTango._PyTango.DevState):
value = value.name
if isinstance(value, str):
html = value.replace("\n", "<br>")
elif fmt in (DataFormat._1D, DataFormat._2D):
# bad, very bad performance! Don't worry for now
value = value.tolist()
html = "[...]"
data['value'] = value
data['html'] = html
data['quality'] = str(quality)
data['time'] = evt_value.time.tv_sec
data['type'] = str(evt_value.type) # can this change..?
self.last_value_event = data
data['model'] = modelObj.getNormalName()
self.write_message(data)
def write_message(self, message):
self.callback(message)
def clear(self):
try:
print "clear", self.attribute
self.attribute.removeListener(self)
del self.attribute
except PyTango.DevFailed as e:
print >>sys.stderr, "Could not unsubscribe %s: %r" % (self.name, e)
class SardanaChannel(ChannelObject, SardanaObject):
def __init__(self,
name,
attribute_name,
username=None,
uribase=None,
polling=None,
**kwargs):
super(SardanaChannel, self).__init__(name, username, **kwargs)
class ChannelInfo(object):
def __init__(self):
super(ChannelInfo, self).__init__()
self.attributeName = attribute_name
self.model = os.path.join(uribase, attribute_name)
self.attribute = None
self.value = None
self.polling = polling
self.info = ChannelInfo()
self.info.minval = None
self.info.maxval = None
logging.getLogger("HWR").debug("creating Sardana model %s, polling=%s",
self.model, polling)
self.init_device()
def init_device(self):
try:
self.attribute = Attribute(self.model)
#
# DIRTY FIX to make compatible taurus listeners and existence of Tango channels/commands
# as defined in Command/Tango.py
#
#if self.attribute.__class__ == taurus.core.tango.tangoattribute.TangoAttribute:
# dev = self.attribute.getParentObj()
# dp = dev.getHWObj()
# try:
# dp.subscribe_event = dp._subscribe_event
# except AttributeError:
# pass
logging.getLogger("HWR").info("initialized")
except DevFailed as traceback:
self.imported = False
return
# read information
try:
self.info.minval, self.info.maxval = self.attribute._TangoAttribute__attr_config.getLimits(
)
logging.getLogger("HWR").info(
"info initialized. Got minval=%s, maxval=%s" %
(self.info.minval, self.info.maxval))
except:
logging.getLogger("HWR").info(
"info initialized. Cannot get limits")
# prepare polling
# if the polling value is a number set it as the taurus polling period
if self.polling:
if type(self.polling) == int:
self.attribute.changePollingPeriod(self.polling)
self.attribute.addListener(self.objectListener)
def getValue(self):
return self._readValue()
def setValue(self, newValue, wait=False):
self._writeValue(newValue)
def _writeValue(self, newValue):
self.attribute.write(newValue)
def _readValue(self):
value = self.attribute.read().value
return value
def getInfo(self):
return self.info
def update(self, event):
data = event.event[2]
try:
newvalue = data.value
if newvalue == None:
newvalue = self.getValue()
if type(newvalue) == tuple:
newvalue = list(newvalue)
self.value = newvalue
self.emit('update', self.value)
except AttributeError:
# No value in data... this is probably a connection error
pass
def isConnected(self):
return self.attribute is not None
def channelListener(self, *args):
ev = AttributeEvent(args)
SardanaChannel._eventReceivers[id(ev)] = saferef.safe_ref(self.update)
SardanaChannel._eventsQueue.put(ev)
SardanaChannel._eventsProcessingTimer.send()
