Serge NOEL
43 lines
1.5 KiB
Python
43 lines
1.5 KiB
Python
# To make one selection of a SensorGroup a "none of the above" choice
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#
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# SensorGroups make sure that only one item is ACTIVE, but it's possible
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# for none to be. If you have panel levers with physical sensors for LEFT
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# and RIGHT, use one of these to get a NONE sensor.
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#
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# Ideally, this would get the list of sensors from the sensor group itself,
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# but that's surprisingly hard.
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#
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# Author: Bob Jacobsen, copyright 2017
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# Part of the JMRI distribution
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import jmri
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import java
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import java.beans
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# Define the listener.
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class SensorGroupAutoItem(java.beans.PropertyChangeListener):
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def set(self, defaultName, groupList) :
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self.default = sensors.getSensor(defaultName)
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self.groupNames = groupList
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# process fake event to set the initial state
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self.propertyChange(java.beans.PropertyChangeEvent(sensors.getSensor(self.groupNames[0]), "KnownState", 0, 0))
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# set up listeners
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self.default.addPropertyChangeListener(self)
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for name in self.groupNames :
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sensors.getSensor(name).addPropertyChangeListener(self)
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return
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def propertyChange(self, event):
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# check for any active
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for name in self.groupNames :
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if (sensors.getSensor(name).knownState == ACTIVE) :
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self.default.state = INACTIVE
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return
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self.default.state = ACTIVE
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return
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# Example of use - add lines like the following
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# that includes system or user names for the default sensor and
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# the rest of the SensorGroup. These must already exist.
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# SensorGroupAutoItem().set("IS100",["IS101", "IS102"])
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