Re: [gwt-contrib] JSInterop assign a function/callback to a property
@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
>> 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 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! :)
>> >
>> > --
>> > You received this message because you are subscribed to the Google
>> Groups
>> > "GWT Contributors" group.
>> > To unsubscribe from this group and stop receiving emails from it, send
>> an
>> > email to google-web-toolkit-contributors+unsubscr...@googlegroups.com.
>> > To view this discussion on the web visit
>> >
>> https://groups.google.com/d/msgid/google-web-toolkit-contributors/d4c8fb2c-6060-4680-9b24-e118a452dc0d%40googlegroups.com.
>>
>>
>> > For more options, visit https://groups.google.com/d/optout.
>>
>
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Re: [gwt-contrib] JSInterop assign a function/callback to a property
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 > 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 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! :)
> >
> > --
> > You received this message because you are subscribed to the Google
> Groups
> > "GWT Contributors" group.
> > To unsubscribe from this group and stop receiving emails from it, send
> an
> > email to google-web-toolkit-contributors+unsubscr...@googlegroups.com
> .
> > To view this discussion on the web visit
> >
> https://groups.google.com/d/msgid/google-web-toolkit-contributors/d4c8fb2c-6060-4680-9b24-e118a452dc0d%40googlegroups.com.
>
>
> > For more options, visit https://groups.google.com/d/optout.
>
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Re: [gwt-contrib] JSInterop assign a function/callback to a property
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 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 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! :)
>
> --
> You received this message because you are subscribed to the Google Groups
> "GWT Contributors" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to google-web-toolkit-contributors+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/google-web-toolkit-contributors/d4c8fb2c-6060-4680-9b24-e118a452dc0d%40googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
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