MATLAB: How to use a popup (dropdown) control to dynamically change values in other edit boxes in the mask for a subsystem

callbackchangecontroldynamicallymaskpopupsimulinksubsystem

I have several different scenarios in a subsystem which I want to choose using a Popup control in a Simulink mask. How can I dynamically populate information in other control objects in the mask dialog with information based on what is currently selected in the Popup control?

Best Answer

Please refer to the the attached example that demonstrates using a Popup control's callback to change the values of two separate Edit controls in a mask.

This is possible by using the 'Callback' property of the Popup control. All variables and functions which can be used in the base MATLAB workspace can be used in control callbacks in a mask. This includes the use of the functions "get_param" and "set_param" to change different dialog variables in the mask.

The attached example primarily uses the functions "get_param" and "set_param" with "gcb" to get and set the values needed in the mask. This can be extended to incorporate other types of control that are also accessible using the "set_param" function.

Related Solutions

MATLAB: How to create a popup control to set the mask block parameters in a masked subsystem in Simulink

To accomplish this, you need to define a Popup control variable in the mask. The Popup control variable will enable you to toggle between the 'Default set' and a 'User-Defined' set. Set the Assignment Field of the Variable to 'Literal'. Then define the Popup Strings as follows:

 Default|UserDefined

For help on Popup Control, refer to the "How Masked Parameters are Stored" section at the following URL:

http://www.mathworks.com/help/simulink/slref/mask-parameters.html

Use the Initialization commands field in the mask to define the Default Masked parameters. Take a look at sample code below. The code uses a Dynamic dialog to set the MaskValues to Default Values. The mask has a Popup control variable and 2 parameters. The Default Value of the parameters in this case are set to '1' and '1' by using set_param. Note that the Mask values are specified as cell arrays.

if (strcmp(def,'Default'))
   set_param(gcb,'MaskValues',{'Default','1','1'})
end

Help on creating Dynamic dialogs can be found at the following URL:

https://www.mathworks.com/help/simulink/ug/create-dynamic-mask-dialog-boxes.html

MATLAB: How to switch between child subsystems of a Variant Subsystem through a pop-up menu or a radio button

Right-click on the Variant Subsystem, select 'Block Parameters (Subsystem)', and enable 'Override variant conditions and use the following variant'.

Then, please refer to the following steps:

1. Create a mask for the Variant Subsystem (Right click on the Variant Subsystem > Mask > Create Mask...)

2. In the Parameters & Dialog tag, add a Popup (or a Radio button) control, specify a desired prompt message, as well as the name of the variable you will use to switch between variants (e.g., myVar)

3. In the Property editor, in the 'Properties' section, click on 'Type options' and enter the desired options (the options should correspond to the Variant Control names). Then select an initial variant for the field 'Value'.

    The variant control names can be found by right-clicking on the Variant Subsystem > Block Parameters (Subsystem), in the 'Variant Control' column.

4. In the Property editor, in the 'Dialog' section, add the following Callback:

>> set_param(gcb,'OverrideUsingVariant',get_param(gcb,'myVar'));

If you wish to activate variants programmatically from MATLAB rather than Simulink canvas from the subsystem mask, please execute the following command:

>> set_param(subsystemName,'OverrideUsingVariant',variantControlName);

For further details, please refer to the attached Simulink model (R2018a).

Best Answer

Related Solutions

MATLAB: How to create a popup control to set the mask block parameters in a masked subsystem in Simulink

MATLAB: How to switch between child subsystems of a Variant Subsystem through a pop-up menu or a radio button

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