On Tue, Mar 31, 2015 at 2:30 PM, Julien Dramaix <[email protected]>
wrote:
> Dear GWT lovers,
>
> I've finally started to play with JsInterop in GWT 2.7 and mainly I'm
> trying to use JsInterop in order to write polymer components.
>
> So far, I have two questions:
>
> 1. I'm using super dev mode and so I'm obliged to use
> the CrossSiteIframeLinker. As the javascript code generated by GWT is
> loaded in an iframe, the exported types are not accessible from the main
> window (only from the iframe). The workaround I found to expose java type
> from the main window is to prefix my namespace by *$wnd*
>
> @JsNamespace("$wnd.jdramaix")
> public class AgeSliderImpl
>
> Isn't it a better way to do that ?
>
>
Yes, in 2.7 you need to use $wnd to expose your code to main window. In GWT
2.8 snapshot, this is the default behavior, you don't need $wnd.
> 2. I want to expose some java field of my class to javascript field. I'm
> trying to use @JsProperty for this purpose but it seems not to work:
>
> @JsNamespace("$wnd.jdramaix")
> public class AgeSliderImpl implements AgeSlider {
> public int age;
>
> @Override
> public int getAge() {
> return age;
> }}
>
> @JsType
> public interface AgeSlider {
> @JsProperty
> int getAge();
>
> }
>
> If I try to access the field in the javascript console,it is undefined:
> > var slider = new jdramaix.AgeSliderImpl()
> > slider.age
> < undefined
>
> But the method getAge exists:
> > slider.getAge
> < function getAge_0_g$(){
> < return this.age_3_g$;
> < }
> Same problem if I rename the method to age(). slider.age is defined by
> point to a function.
>
> Does @JsProperty work (at least when we export Java to Javascript) in GWT
> 2.7. ? If so how to use it ?
>
>
@JsProperty methods defined in @JsType that is implemented by concrete
classes does not work with GWT 2.7 (basically the scenario in your code
snippet), it doesn't generate the code with a javascript property
setter/getters.
In GWT 2.8 snapshot, javascript property setter/getter are still not
implemented (yet) but instead you can use @JsType with concrete class and a
public field, and you can skip the JsType interface completely.
i.e.
@JsType
public class AgeSlider {
public int age;}
if you want to export the constructor, don't forget to add @JsExport as
well.
Thanks
>
> Julien
>
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