Hello Ray,
thank you for your reply.
Okay, i already assumed that it is not yet in.
do i understand your suggestion correctly that i then could do
@JsType
public interface Receiver {
@JsProperty
void onReady(JavaScriptObject onReady);
}
receiver.onReady(samToFunction(myCallback)); ?
btw: for me the short version like cb.@MyCallback::someMethod did not work
in jsni even if i had the class imported and also used in java part (method
params) of the code. i had to use the fully qualified name.
Am Mittwoch, 5. November 2014 09:17:29 UTC+1 schrieb Ray Cromwell:
>
> That document represents intent to implement, but SAM handling isn't
> implemented yet in GWT 2.7, since it is most useful after Java8 lands.
> Shortly Java8 will land, and then SAM handling in JsInterop and you'll
> be able to use GWT 2.8 nightly snapshots. For now, you'll need a
> utility function that wraps a SAM as a function, e.g.
>
> public static native JavaScriptObject samToFunction(MyCallback cb) /*-{
> return function(arg) { return cb.@MyCallback::someMethod(*)(arg); };
> }-*/;
>
> On Tue, Nov 4, 2014 at 11:28 PM, Kay-Uwe Janssen <[email protected]
> <javascript:>> wrote:
> > As i had no luck on Google+ yet, i'll try it here.
> >
> > First the G+ Post:
> > https://plus.google.com/116136390679208063122/posts/52kcbwwngWo
> >
> >
> > Well I just started to work on a ChromeCast Receiver built with GWT. As
> the
> > Receiver API is in JS i wanted to try JSInterop over JSNI but had some
> > struggle.
> >
> > The ChromeCast Api has some properties that can be set with a function
> to
> > act as a callback. eg for onReady.
> >
> > castReceiverManager.onReady = function(event) {
> > // do stuff
> > };
> >
> > Now my question is: How can i do this with JsInterop or is it not yet
> > possible?
> >
> > as mentioned in
> >
> https://docs.google.com/document/d/1tir74SB-ZWrs-gQ8w-lOEV3oMY6u6lF2MmNivDEihZ4
>
> > below "Single Abstract Method Handling" i tried something like this
> >
> > @JsType
> > public interface Receiver {
> > @JsProperty
> > void onReady(Runnable onReady);
> > }
> >
> > when trying to execute the method with this snipped i get "Exception
> caught:
> > (TypeError) : object is not a function"
> >
> > private native void test(Receiver receiver)/*-{
> > receiver.onReady();
> > }-*/;
> >
> >
> > to see whats the value of onReady i did console.log(receiver) and got
> this:
> > (where onReady is set the way above and onSenderConnected has been set
> the
> > JS way inside an JSNI method.
> >
> > onReady: JsTest$1_1_g$
> > onSenderConnected: function (event_0_g$)
> >
> >
> > is there a way to achieve this yet or do i have to wait for 2.8/3.0?
> >
> > i tried to dig into the gwt code to see if there is a way to add
> something
> > to support this but unfortunately the gwt code for js processing is a
> bit
> > out of my scope.
> >
> >
> > some possible solutions would be either
> > interface JsFunction {
> > <T> T call(Object... args);
> > }
> > or
> > interface MyOnReadyCallback {
> > @JsFunction
> > MyReturnType anyName(String arg1, boolean arg2, SomeOtherType arg3);
> > }
> >
> > and let the "Single Abstract Method Handling" find the method and add
> it.
> >
> >
> > Thanks! :)
> >
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