@kay-uwe what Ray says is:
@JsType
public interface Receiver {
void onReady(Function onReadyFn);
public static class Static {
public static native Receiver create() /*-{
return //TODO return Receiver!!!
}-*/;
}
}
......
@JsType
public interface Function {
void f(JavaScriptObject param );
}
......
Using all together:
Receiver receiver = Receiver.Static.create();
receiver.onReady(new Function(){
public void f(JavaScriptObject param){
//TODO work!!
}
});
I am working in some projects with JsInterop:
- https://github.com/workingflows/gwt-jscore.git
- https://github.com/workingflows/gwt-jquery.git
- https://github.com/workingflows/gwt-playground.git
Cheers :)
El miércoles, 5 de noviembre de 2014 06:22:53 UTC-3, Kay-Uwe Janssen
escribió:
>
> 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]>
>> 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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