Blocks in Simulink can be renamed automatically by setting up an event listener in MATLAB that triggers a function to rename the block every time a new one is added using "set_param" function .
The code below shows the steps to set up an event listener that appends a custom prefix to the name of each new block added to the Simulink canvas.
function renameBlock(block)
% Validate the block handle
if isempty(block) || ~ishandle(block) || ~strcmp(get_param(block, 'Type'), 'block')
return;
end
% Get the original block name
originalName = get_param(block, 'Name');
% Define the custom prefix
customPrefix = 'Custom_';
% Append the custom prefix if it's not already there
if ~startsWith(originalName, customPrefix)
newName = [customPrefix, originalName];
set_param(block, 'Name', newName);
end
end
function setupBlockAddListener(modelName)
% Ensure the model is open
load_system(modelName);
% Add a listener for block addition events
listener = addlistener(get_param(modelName, 'Object'), 'ObjectChildAdded', @(s,e)renameBlock(e.Child));
% Store the listener in the base workspace to keep it alive
assignin('base', 'myBlockAddListener', listener);
end
You can read more about “get_param” and “set_param” here:
Please note the following:
- Make sure the “setupBlockAddListener” function is called after opening the model and before adding any blocks to ensure that all new blocks are captured by the listener.
- The listener is stored in the base workspace to keep it active. If you close MATLAB, you will need to run the “setupBlockAddListener” function again when you reopen MATLAB and your model.
Lastly, to address the severity level of edit-time checks, you can follow the documentation available here :
