How to make instant change in masked subsystem GCB when slecting one of two options

Hello guys, I would like to ask: I am making masked subsystem. It contains POPUP parameter with two options (A and B). Moreover, it contains two separate EDIT parameters X and Y.

If I choose Popup parameter A the Edit parameter Y is disabled.

If I choose Popup parameter B the Edit parameter X is disabled.

It works all fine but the parameter X or Y is disabled only if I select APPLY button.

I would like that X or Y is disabled immediately after I select Popup A or B.

Can you help me with this issue, please?

Thank a lot.

Martin

Answer 1

[Shubh]

Hi Martin,

To achieve the dynamic enabling and disabling of Edit parameters X and Y in your masked subsystem based on the selection of Popup parameters A and B, you can utilize the Simulink.Mask and Simulink.MaskParameter classes in MATLAB. These classes provide a programmatic way to control mask properties, parameters, and their behaviors.

Here's a step-by-step approach to implement this functionality:

1. Create a Mask Object: First, you need to create an object of the Simulink.Mask class for your subsystem block. This is done using the Simulink.Mask.create method. For example:

maskObj = Simulink.Mask.create('yourSubsystemBlockPath');

2. Add Popup Parameter: Add the Popup parameter (A and B options) to your mask using the addParameter method of the mask object. For instance:

maskObj.addParameter('Type', 'popup', 'Name', 'PopupParam', 'Prompt', 'Select Option', 'TypeOptions', {'A', 'B'});

3. Add Edit Parameters X and Y: Similarly, add the Edit parameters X and Y to your mask.

maskObj.addParameter('Type', 'edit', 'Name', 'X', 'Prompt', 'Parameter X');
maskObj.addParameter('Type', 'edit', 'Name', 'Y', 'Prompt', 'Parameter Y');

4. Use Callback for Dynamic Behavior: To make parameters X and Y enable or disable dynamically, use the Callback property of the Popup parameter. This property allows you to specify MATLAB code that executes when the Popup parameter value changes.

popupParam = maskObj.getParameter('PopupParam');
popupParam.Callback = 'dynamicEnableDisable(gcb, get_param(gcb, ''PopupParam''))';

5. Define the Callback Function: In your model file or a separate script, define the dynamicEnableDisable function that enables or disables parameters X and Y based on the Popup selection.

function dynamicEnableDisable(block, popupValue)
    switch popupValue
        case 'A'
            set_param([block '/X'], 'Enabled', 'off');
            set_param([block '/Y'], 'Enabled', 'on');
        case 'B'
            set_param([block '/X'], 'Enabled', 'on');
            set_param([block '/Y'], 'Enabled', 'off');
    end
end

This function uses the set_param command to set the Enabled property of parameters X and Y based on the Popup parameter's value.

6. Apply and Test: Save your changes and test the subsystem mask. The Edit parameters X and Y should now be dynamically enabled or disabled based on the Popup parameter selection.

Remember, this approach uses MATLAB code to programmatically control the mask parameters and their behaviors, thus providing a more dynamic interaction within the mask dialog of your subsystem.

For further details and examples, you can refer to the MATLAB documentation on

https://www.mathworks.com/help/simulink/ug/control-masks-programmatically.html

https://www.mathworks.com/help/simulink/slref/simulink.maskparameter-class.html

[Martin Schrotter]

Thank you for your response. It was very valuable.