APP DESIGNER - How to try and catch TeX syntax?

I have a uiaxes component and an uieditfield component.

I want the user to be able to change the uiaxes' title using the edit field, in TeX syntax.

My problem is everytime I try to write a wrong TeX syntax string, an error pops out.

I want to be able to catch the error and display an error to the user if the syntax is wrong, instead of matlab going crazy.

This is my code:

try
    title(app.MyAxes, app.MyEditField.Value);
catch
    SetError(app, 'Invalid TeX syntax');
end

(SetError is a function I made to diplay errors to the user)

this does not work - instead I get this error:

Error using appdesigner.internal.appdesignererrorcallback (line 8)
Error updating Text.

   String must have valid interpreter syntax:
  MyWrongSyntaxTitle{

Error in appdesigner.internal.service.AppManagementService/axeserrorhandler (line 138)
                appdesigner.internal.appdesignererrorcallback(event.Source, event);

Error in appdesigner.internal.service.AppManagementService>@(source,event)obj.axeserrorhandler(event,app) (line 132)
                    @(source, event)obj.axeserrorhandler(event, app);

Error while evaluating HTMLCanvas ErrorCallback

(MyWrongSyntaxTitle{ is the text I put in the edit field to test the try-catch)

What am I doing wrong? How can I catch this error?

(SetError is never called)

Answer 1

[Roger Parkyn]

I don't know the answer to your specific quesion but this may help others using appdesigner:

try
    some_code; % You can put it around quite large chunks of code so that, at least, it fails more informatively
catch ME % ME is of the class MException (in-built Matlab)
    str = sprintf(['Something is wrong with the plotting code. \n' 'Matlab says: \n' ME.message]);
    uialert(app.UIFigure, str, 'Plotting Problem');
end