in this thread JKC wrote:

Quote:

…Just make a .js file (name isn’t important), and put it in the jsextensions folder. For each “nobox” class you’d like to wrap with a JS interface, add a line like the following:

maxclasswrap(“mymaxclassname”,”MyJavascriptClassName”);

This will automatically create a class definition wrapped with the
appropriate methods and instantiable in JS like this

var mything = new MyJavascriptClassName();

I modified the simplemax example to be a NOBOX. And then i added this to a js file in jsextensions:

maxclasswrap(“simplemax”,”TriggerPopup”);

but when i try and call this from a js file i get an error:

js: Macintosh HD:/Users/oli/Desktop/poptest.js: Javascript ReferenceError: TriggerPopup is not defined, line 9

Does anyone know what the problem is?

thanks,

oli

Has you nobox object been loaded by Max prior to trying to use it from js? For example, have you put the .mxo/.mxe into the Cycling ’74/extensions folder prior to launching Max?

JS should be able to wrap the class this way, but the class has to be loaded first.

c->c_flags = CLASS_FLAG_POLYGLOT;
class_register(CLASS_NOBOX, c);

(thanks ej)

without setting CLASS_FLAG_POLYGLOT, JS wasn’t seeing my object

oli

var toto = new MyClass()
post(toto.myattribute, "n");
toto.myattribute = 74;
post(toto.myattribute, "n");

and if you want to make methods that returns something, you need to use the A_GIMMEBACK signature. For instance:

class_addmethod(c, (method)simplemax_doabs,				"doabs",		A_GIMMEBACK, 0);

t_max_err simplemax_doabs(t_simplemax *x, t_symbol *s, long ac, t_atom *av, t_atom *rv)
{
	t_atom a;
	double f = 0;

	if (ac) {
		if (atom_gettype(av) == A_LONG)
			f = fabs(atom_getlong(av));
		else if( atom_gettype(av) == A_FLOAT)
			f = fabs(atom_getfloat(av));
	} else
		error("missing argument for method doabs()");

	atom_setfloat(&a, f);

	atom_setobj(rv, object_new(gensym("nobox"), gensym("atomarray"), 1, &a));
	return MAX_ERR_NONE;
}

oli