How to assign state labels of combo box dynamically?

Question

DJM 2018-12-14

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https://ww2.mathworks.cn/matlabcentral/answers/435791-how-to-assign-state-labels-of-combo-box-dynamically

回答： Bhanu Muramalla 2020-9-16

I have created a "class_usecase" class that define certain use cases I want to simulate. One of the class properties is "name". After that I create an array of use cases of the class "class_usecase". In Simulink I want to be able to select which use case I want to simulate using a drop down menu. This is done with the Combo Box block, where I use "state value" to define the element of the array, "state label" shows a coprehensible title of the use case, equal to "usecase(x).name". This works, however, I don't want to type and order the state values and labels manually. The array of use cases changes, it is double work to update the Combo Box and it is prone inconsisteny between the dropdown and the array of use cases. It is not possible to put variables as parameters in the Combo Box, and I can also not find the state values and state labels using get_param(). Does anyone have suggestions how I could automate this, so the dropdown syncs to the array in the workspace?