Set callback Function to Multiple Blocks

Hello !

I want to set the same callback OpenFcn function to multiple Subsytem blocks, but I can figure it out how. Can you help me please ?

Thank you so much!

Answer 1

[Suman]

Hi @Daiana Tudose

You can programmatically assign the same "OpenFcn" callback to multiple Subsystem blocks in Simulink using a MATLAB script.

1. Create a string containing all the code for the callback.
2. Find all the subsytem blocks.
3. Use set_param to set the callback function.

For example:

callbackLines = {
    'disp(''You opened this subsystem'');'
    'x = 42;'
    'y = x * 2;'
    'fprintf(''Computed value: %d\n'', y);'
};

callbackStr = strjoin(callbackLines, '\n');

subsystems = find_system(gcs, 'BlockType', 'SubSystem');

for i = 1:length(subsystems)
    set_param(subsystems{i}, 'OpenFcn', callbackStr);
end

Hope this helps!