MATLAB: Do I not see the ‘Open Model’ button when I have an image as the MaskDisplay on the Model block in Simulink 6.0 (R14)

displaymaskmaskdisplaymodelpicturereferencereferencingsimulink

I have a model that has a Model block, and thus references another model. In the top-level model, I have an image for the display of the Model block, as set with the following command:

set_param (gcb, 'MaskDisplay','image(imread(''b747.jpg'')')

When I have this image on the Model block, I double click on the block and do not see the 'Open Model' button that I normally see. I can reproduce this using the models attached below.

Best Answer

We have verified this is a bug in Simulink 6.0 (R14) in the way a Model block handles having an image. As a workaround, you can right-click on the Model block and select 'Open Model' to open the referenced model.

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MATLAB: Problems with MaskDisplay command

You can just execute what you're passing in as the third parameter to set_param to make sure that it's a string (and not a cell-array). I get the same error in MATLAB when I say:

>> {'disp('{\bf\it\fontsize{20}\fontname{Calisto MT}MODEL}', 'texmode','on'); port_label('output', 1, 'qpp'); port_label('output', 2, 'qp'); port_label('output', 3, 'q'); port_label('input', 1, 'u')'}
   {'disp('{\bf\it\fontsize{20}\fontname{Calisto MT}MODEL}', 'texmode','on'); port_label('output', 1, 'qpp'); port_label('output', 2, 'qp'); port_label('output', 3, 'q'); port_label('input', 1, 'u')'}
           |
  Error: Unbalanced or unexpected parenthesis or bracket.

Just from a cursory glance, the problem is that you are not escaping the quotes in the string. So you need:

   set_param('sys/blockname', 'MaskDisplay', 'disp(''{\bf\it\fontsize{20}\fontname{Calisto MT}MODEL}'', ''texmode'',''on''); port_label(''output'', 1, ''qpp''); port_label(''output'', 2, ''qp''); port_label(''output'', 3, ''q''); port_label(''input'', 1, ''u'')')

MATLAB: Modify the MaskDIsplay of a block by using c sfunction

Do you mean that you need to perform that command from the C-code? Is it because the MaskDisplay value is computed dynamically by the C-MEX S-function? If yes, in which callback method you would like to do this?

In principle, you can use mexCallMATLAB to call the set_param function from the C-MEX S-function, but you can set MaskDisplay only at "edit-time", ie, before mdlInitializeSizes is run, so the only place that you can do this might be mdlCheckParameters (although I haven't verified this).

Best Answer

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MATLAB: Problems with MaskDisplay command

MATLAB: Modify the MaskDIsplay of a block by using c sfunction

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