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from .. import Device
class AD_OverlayPlugin(Device):
"""
AreaDetector Overlay Plugin
"""
attrs = ('Name', 'Name_RBV',
'Use', 'Use_RBV',
'PositionX', 'PositionX_RBV',
'PositionY', 'PositionY_RBV',
'PositionXLink', 'PositionYLink',
'SizeXLink', 'SizeYLink',
'SizeX', 'SizeX_RBV',
'SizeY', 'SizeY_RBV',
'Shape', 'Shape_RBV',
'DrawMode', 'DrawMode_RBV',
'Red', 'Red_RBV',
'Green', 'Green_RBV',
'Blue', 'Blue_RBV')
_nonpvs = ('_prefix', '_pvs', '_delim')
def __init__(self, prefix):
Device.__init__(self, prefix, delim='', mutable=False,
attrs=self.attrs)
def ensure_value(self, attr, value, wait=False):
"""ensures that an attribute with an associated _RBV value is
set to the specifed value
"""
rbv_attr = "%s_RBV" % attr
if rbv_attr not in self._pvs:
return self._pvs[attr].put(value, wait=wait)
if self._pvs[rbv_attr].get(as_string=True) != value:
self._pvs[attr].put(value, wait=wait)
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