I've used the JSNI before but I've never had to pass a function pointer as a parameter using it and I'm not sure how to do this. Any help is appreciated!
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2 Answers
You should be able to pass a JavaScriptObject that represents a JavaScript function object. I don't think you can do anything with Java functions, though. So for example you could:
final native JavaScriptObjet myFuncCreator() /*-{
return function (x, y) { return y - x; };
}-*/
final native int myFuncUser(JavaScriptObject funcObj, int a, int b) /*-{
return funcObj(a,b);
}-*/
Admittedly, I didn't try this code but I believe it should work.
Comments
Along the same lines as sinelaw's answer, here's a way to get a callback.
static final native JavaScriptObject createFunction(final Runnable runnable)
/*-{
return function() {
[email protected]::run()();
}
}-*/
static final void registerOnClickCallback(Element element, final Runnable runnable) {
JavaScriptObject callback = createFunction(runnable);
_registerOnClickCallback(element, callback);
}
static final native void _registerOnClickCallback(Element element, JavaScriptObject callback)
/*-{
element.onclick = callback;
}-*/
Hope this helps!
