MATLAB: How to open the dialog parameters of a block inside a subsystem when double-clicking the subsystem

simulink

I have a subsystem in my model which contains a bus-selector block. I would like to be able to double-click on the subsystem and have that GUI appear so I can select the busses directly. I know I can create a mask but it is not that simple to pass the commands to the bus selector.

Best Answer

It is possible to programatically open the Dialog of a given block using the 'open_system' command, giving the block path as a parameter. To extend this functionality to allow this GUI to be opened when you select another block, you can place this command in the 'OpenFcn' callback function. I have attached a model which demonstrates this approach. By opening the subsystem named 'Masked Subsystem', the dialog box for the bus selector will be shown. The callback can be seen by right-clicking on the block, selecting properties and finding 'OpenFcn' on the Callbacks tab. It is worth noting that by using this callback on a Masked subsystem, it is possible to bypass this callback by using the 'Look under mask' option or by using the shortcut Ctrl+U.

Related Solutions

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).

MATLAB: Subsystem(Mask)

You can create an InitFcn Block Callback Function on your subsystem so that the corresponding MATLAB-file is always run when the subsystem is executed. If you want to run the MATLAB code only when the subsystem is opened, you can use the OpenFcn callback.

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Related Solutions

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

MATLAB: Subsystem(Mask)

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