Class SE8cSignalHead

  • All Implemented Interfaces:
    java.beans.VetoableChangeListener, java.lang.Comparable<NamedBean>, java.util.EventListener, PropertyChangeProvider, LocoNetListener, NamedBean, Signal, SignalHead

    public class SE8cSignalHead
    extends DefaultSignalHead
    implements LocoNetListener
    Extend jmri.SignalHead for signals implemented by an SE8C.

    This implementation writes out to the physical signal when it's commanded to change appearance, and updates its internal state when it hears commands from other places.

    To get a complete set of aspects, we assume that the SE8C board has been configured such that the 4th aspect is "dark". We then do flashing aspects by commanding the lit appearance to change.

    This is a grandfathered implementation that is specific to LocoNet systems. A more general implementation, which can work with any system(s), is available in SE8cSignalHead. This package is maintained so that existing XML files can continue to be read. In particular, it only works with the first LocoNet connection (names LHnnn, not L2Hnnn etc).

    The algorithms in this class are a collaborative effort of Digitrax, Inc and Bob Jacobsen.

    Some of the message formats used in this class are Copyright Digitrax, Inc. and used with permission as part of the JMRI project. That permission does not extend to uses in other software products. If you wish to use this code, algorithm or these message formats outside of JMRI, please contact Digitrax Inc for separate permission.

    • Constructor Detail

      • SE8cSignalHead

        public SE8cSignalHead​(int pNumber,
                              java.lang.String userName)
    • Method Detail

      • init

        void init​(int pNumber)
      • updateOutput

        protected void updateOutput()
        Description copied from class: DefaultSignalHead
        Type-specific routine to handle output to the layout hardware.

        Does not notify listeners of changes; that's done elsewhere. Should use the following variables to determine what to send:

        • mAppearance
        • mLit
        • mFlashOn
        Specified by:
        updateOutput in class DefaultSignalHead
      • message

        public void message​(LocoNetMessage l)
        Description copied from interface: LocoNetListener
        Member function that will be invoked by a LocoNetInterface implementation to forward a LocoNet message from the layout.
        Specified by:
        message in interface LocoNetListener
        l - The received LocoNet message. Note that this same object may be presented to multiple users. It should not be modified here.
      • dispose

        public void dispose()
        Description copied from class: AbstractNamedBean
        Deactivate this object, so that it releases as many resources as possible and no longer effects others.

        For example, if this object has listeners, after a call to this method it should no longer notify those listeners. Any native or system-wide resources it maintains should be released, including threads, files, etc.

        It is an error to invoke any other methods on this object once dispose() has been called. Note, however, that there is no guarantee about behavior in that case.

        Afterwards, references to this object may still exist elsewhere, preventing its garbage collection. But it's formally dead, and shouldn't be keeping any other objects alive. Therefore, this method should null out any references to other objects that this NamedBean contained.

        Specified by:
        dispose in interface NamedBean
        dispose in class AbstractNamedBean