Editing mask so that subsystem's color changes as per input port value

I would like change the color of my subsystem using the value come in the input port. See screenshot below, the subsystem is CB and the input port reads in a signal called "S1P1". I want CB to change its color as per the value of S1P1. Thanks

[Ismael]

found a solution.

b = get_param(gcb,'PortHandles');

in = b.Inport(1);

line = get_param(in,'Line');

if line ~= -1

srcBlock = get_param(line,'SrcBlockHandle');

srcValue = get_param(srcBlock,'Value');

inputVal = evalin('base',srcValue);

if inputVal == 0

patch([0 1 1 0],[0 0 1 1],[1 0 0]);

end

if inputVal == 1

patch([0 1 1 0],[0 0 1 1],[0.5 0.5 0.5]);

end

end

[Les Beckham]

Looks like a clever solution, except I'm wondering why this line

inputVal = evalin('base',srcValue);

isn't just

inputVal = srcValue;

Or just get rid of that line and use srcValue in the following if conditions.

Also, where did you put this code? In one of the model callbacks?

[Ismael]

Hi Les,

here is additional explanation:

srcBlock = get_param(line,'SrcBlockHandle') % gets the handle

srcValue = get_param(srcBlock,'Value') % gets the signal name i.e. srcValue = 'SIP1' (see picture above)

inputVal = evalin('base',srcValue) % gets S1P1 value, i.e. inputVal = 1 (in this case)

the block that change color receives a signal at its input. This signal is given in the form of a parameter name (S1P1) which in turn is provided from a *.m file as I have many blocks for my project and I want to initialise those input signals (parameters) at once.

Also, The code is placed in "Icon" tap of the Edit MASK enviroment