Serge NOEL
43 lines
1.5 KiB
Python
43 lines
1.5 KiB
Python
# set up listener(s) for a sensor to control the "Held" state of a signal
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# sensor active sets signal to released, inactive sets to held
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# only fires on sensor change
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#
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# we use this at MWOT to allow a push-button to release a train and
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# start an AutoDispatcher2 run
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# based on SignalHeadFromSensors.py
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#
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# Author: Steve Todd, copyright 2014
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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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from org.slf4j import LoggerFactory
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# Define one sensor listener.
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class HoldSignalForSensorListener(java.beans.PropertyChangeListener):
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def setup(self, sensor, signal) :
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if (sensor == None) : return
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logger.debug("setting " + sensor + " to hold/release " + signal)
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self.signal = signals.getSignalHead(signal)
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sensors.provideSensor(sensor).addPropertyChangeListener(self)
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return
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def propertyChange(self, event):
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if (event.newValue == ACTIVE) :
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logger.debug("release " + self.signal.getSystemName())
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self.signal.setHeld(False) #release when sensor goes high
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else :
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logger.debug("hold " + self.signal.getSystemName())
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self.signal.setHeld(True) # hold when sensor goes low
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return
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####################################################################
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logger = LoggerFactory.getLogger("jmri.jmrit.jython.exec.HoldSignalForSensor")
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#set up each sensor to signalhead connection, repeat as needed.
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# note: signalhead must already exist
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HoldSignalForSensorListener().setup("LS1001","HIY152cw")
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HoldSignalForSensorListener().setup("LS1002","HIY155cw")
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