I've done very very little with Javascript yet so here's a possible
scenario that comes to mind:
- I include the jsme editor in a stringresponse problem
- the student draws the molecule
- the student clicks on 'submit'
- somehow a javascript of mine gets control and somehow gets the structure
converted to a smiles string
- the script then submits the smiles string to loncapa for evaluation like
a normal stringresponse problem
Is something like this possible?
I have not done it, and I would not call it simple, but I think it
should be possible.
LON-CAPA is doing it by adding a button opening the editor in a new
window, and copying the string when it is closed. See sub
separate_jme_window in loncom/homework/chemresponse.pm.
It might be easier to include the editor directly in the response, and
use a callback (.setCallBack()) to update the response field that
LON-CAPA will use. The only issue is to get the reference to the input
element. LON-CAPA creates an id based on other things. I am not sure how
to best do that.
You can get the SMILES with .smiles() or the JME string with .jmeFile().
The JSME API is here:
http://peter-ertl.com/jsme/JSME_2016-04-27/api_javadoc/index.html
Something like that (not tested!!):
<script src="jsme/jsme.nocache.js"></script>
<script>
var jsmeApplet;
function jsmeOnLoad() {
jsmeApplet = new JSApplet.JSME("jsme_container", "380px", "340px");
jsmeApplet.setCallBack('update_input', update_input);
}
function update_input(event) {
// NOTE: getting a reference to the input field like that might
not work in a future LON-CAPA version:
var form = document.forms.lonhomework;
var input = form['HWVAL_custom-jsme-response'];
input.value = jsmeApplet.jmeFile();
}
</script>
</head>
<body>
<div id="jsme_container"></div>
<stringresponse id="custom-jsme-response"><textline/></stringresponse>
</body>
Damien
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