Any JMRI power indicator needs to be able to display four states (on, off, unknown (some systems do not report track power state), and inconsistent (reported state is not commanded state)), not two, which is why we chose to use four colors (green, red, yellow, and grey) and text in the standard power indicator in DecoderPro. Since it's a soft switch reporting states it can't be deliberately set to by the user (unknown and inconsistent), we use the IEEE 1621 power symbol to indicate a power toggle (although we use yellow for "unknown" instead of "standby" and overloaded inconsistent onto it) instead of creating new symbols that have to be learned.
Randall
On Oct 10, 2016, at 09:12, Jim Albanowski jimalbanowski@... [jmriusers] <jmriusers@...> wrote:
Group:
We've touched on the R-G issue with the track on the model board. While
R-G is the most common color vision problem some have a total color
identification problem. There is a test that an eye doctor can use to
determine exactly what is happening...
We talked about icons for the tack occupancy and we can for power too.
Look at almost any electrical device today and there is a set of three
icons. A "zero" for off an "I" for on and a "zero with an embedded I in
the middle" the I is a bit raised...
With DCC being a square wave an icon can be made up for that too. A
click button on screen made up of these icons to control power would
work. If could me made to a reversed black block to further show on and
off status.
Since track power being on is the normal state of affairs I would put
off in the reverse black version to be more noticeable.
JIm Albanowski
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