MATLAB: Popup value in Simulink Mask doesn’t refresh

MATLABsimulink

I am currently masking a block in simulink. The mask contains a popup list called dbclist with hardcoded type options (1, 2, 3, …, 7). The callback function of said popup list looks like this:

msk = Simulink.Mask.get(gcb);
dbcPopup = msk.getParameter('dbclist');
dbcPopup.Value

When changing the value of dbclist while using the mask the command window always responds with:

ans =
1
ans =
1
ans =
1

How can I get the actual value of dbclist? I am using MATLAB 2014b on Mac OS X.

Best Answer

I have found a solution. I am getting the correct value by using

vals = get_param(gcb,'MaskValues');
dbcValue = vals{1}

instead of

msk = Simulink.Mask.get(gcb);
dbcPopup = msk.getParameter('dbclist');
dbcPopup.Value

I still don't know what is wrong with the first approach, especially because it works for Abdus. I would really appreciate iff someone figures out what is wrong.

Related Solutions

MATLAB: How to get SIMULINK to use Dialog Callbacks and not GUI Callbacks when having a block mask with a GUI build using GUIDE

This is expected behaviour.

As a workaround you can modify the GUI MATLAB file to evaluate the callbacks of the SIMULINK block mask.

The following code illustrates how to do this:

names = get_param(gcb,'MaskNames');
callbacks = get_param(gcb,'MaskCallbacks');
eval(callbacks{find(strcmp(names,'callback_name'))});

MATLAB: Dynamically populating mask parameter popup list

Actually, I figured this out after hours of experimenting with Mask Parameters. This is one way to do it: You can access the 'MaskStyles' parameter like so:-

myMaskStylesVar = get_param(gcb, 'MaskStyles');

Here you should be able to observe the MaskStyles for each of your parameters as edit, checkbox, DataTypeStr, Minimum, Maximum or ...wait for it... popup! Yes, and 'popup' style is defined as follows:-

popup(menuitem1|menuitem2|menuitem3|...etc)

So you can modify the corresponding cell of myMaskStylesVar with the menu items of your choice and set them back as:-

myMaskStylesVar{1} = 'popup(red|green|blue|yellow)'; % Assuming the popup is the first parameter
set_param(gcb, 'MaskStyles', myMaskStylesVar)

You can add this code at any desired callback. In my case, I put it in 'OpenFcn'. However that led to another issue with the Mask Parameters Dialog not being invoked at the end of the code. So I had to do some crude workaround like below to invoke the Mask Parameter Dialog, but at the same time, not lose my precious code above!

a = get_param(gcb, 'OpenFcn');
set_param(gcb, 'OpenFcn', '');
open_system(gcb); %With no OpenFcn defined, this line will call Mask Parameter Dialog
set_param(gcb, 'OpenFcn', a); %Restore your original OpenFcn code

I am 99.99% sure this issue can be handled in a less comical way than above. But it works for me and my boss doesn't complain!! :)

Best Answer

Related Solutions

MATLAB: How to get SIMULINK to use Dialog Callbacks and not GUI Callbacks when having a block mask with a GUI build using GUIDE

MATLAB: Dynamically populating mask parameter popup list

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