Why do 'SelectChangeFcn' callbacks need to be activated for a button group in GUIDE?

'SelectionChangeFcn' callbacks for button groups (uibuttongroup) in GUIDE are not generated by default.

Reproduction Steps:

1. Open GUIDE

2. Drag and drop a button group into the layout area. Drag and drop 2 radio buttons into the button group.

3. Save the GUIDE figure and notice that the file generated in this process does not have a 'SelectionChangeFcn' callback for the button group.

Note that 'SelectionChangeFcn' does not appear as a property in the Property Inspector when you double click on the button group.

Answer 1

[MathWorks Support Team]

To work around this issue explicitly add a button group 'SelectionChangeFcn' callback to the GUI program file using these steps:

1. Select the button group.

2. In the View menu, select View Callbacks -> SelectionChangeFcn.