Sending a javascript command when a step is displayed.

[William Haynes]

Christian,

A while back you showed me how to send javascript commands to geogebra when the advice is opened:  https://numbas.mathcentre.ac.uk/question/65285/do-something-in-javascript-when-the-advice-is-displayed/

I would like to do the same thing when a student "shows steps" . Is there a signal for that, or another way to achieve the same result?

Thanks,

Will

[Christian Lawson-Perfect]

There isn't a signal for it at the moment - I'll add one.

Can you tell me what you're trying to do? Rather than implement this and never thinking about it again, I wonder if there could be something built-in to do what you want.

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[William Haynes]

Hi Christian,

I would like to make some objects in a geogebra diagram visible when a step is shown.  I can do it when the advice is shown with something like this in the preamble, where applet is a jme variable created with geogebra_applet():

question.signals.on('adviceDisplayed',function() {

  try{

    var app = question.scope.variables.applet.app;  

    app.setVisible("showV", true);

  }

  catch(err){}  

})

I can’t work out how to do the same when a step is shown however.

Will

[Christian Lawson-Perfect]

OK, I think just having an event you can hook into is the right thing to do.

I've added two events, "openSteps" and "hideSteps", to the part object.

Here's a question showing how to use them: https://numbas.mathcentre.ac.uk/question/123410/opensteps-and-hidesteps-events/. The "when the part is created" script contains some code to show an alert box when steps are shown or hidden.

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