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How to find checkboxes in panel component in MATLAB app designer?

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% Find all the checkbox objects belonging to features
checkboxes = findobj(app.features, 'Style', 'checkbox');
In this code I'm trying to find all checkboxes that are in the panel "app.features". I don't get an error message, but I can't find any objects either. I get an 0x0 GraphicsPlaceholder. I only want to find the checkboxes that are in this panel, not in the whole app. How do I do this?
I attached the app, the section I'm talking about is in callbackfunction btnDrawButtonPushed(app, event).

Accepted Answer

Cris LaPierre
Cris LaPierre on 28 Jan 2023
Try this instead
checkboxes = findall(app.features,'type','uicheckbox');
  2 Comments
Kevin Gjoni
Kevin Gjoni on 28 Jan 2023
Now i get an error further down in my code:
% Initialize an empty cell array to store the names of the selected checkboxes
selected_names = {};
% Loop through the checkboxes and check which ones are selected
for i=1:numel(checkboxes)
if get(checkboxes(i), 'Value') == 1
% If the checkbox is selected, add its name to the cell array
selected_names{end+1} = get(checkboxes(i), 'String');
end
end
it says
Unrecognized property String for class CheckBox.
I want to store the names of only the selected checkboxes as I need them for something else in my code.
Cris LaPierre
Cris LaPierre on 28 Jan 2023
As the message states, there is no String property for checkboxes. The checkbox properties documentation page contains a list of all the properties of a checkbox. There, you will see the property name is 'Text' instead of 'String'.
Try this instead.
selected_names{end+1} = checkboxes(i).Text;

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