Re: GWT JSNI Callback

On Tuesday, June 5, 2012 3:42:36 AM UTC+2, zorro wrote:

I am trying to implement a callback using JSNI. 

 1. I don't know if changing "this" is allowed in the way I do it.

No.

BTW, you're not doing much.

 

 2. I don't know if such an assignment is advisable from the perspective of JSNI functionality

No.

 

 3. The compiler in Eclispe does not seem to grasp that as well and I don't know the right syntax 

for    this.@com.roamtopix.client.StaticFacad.JsCallback::callback.execute(Lcom/google/gwt/core/client/JavaScriptObject;)(jsObject); with "callback.execute" it says 

"JavaScript parsing: Missing ) after argument list"

for this.@com.roamtopix.client.StaticFacad.JsCallback::callback::execute(Lcom/google/gwt/core/client/JavaScriptObject;)(jsObject);with "callback::execute" it says

"JavaScript parsing: Invalid label"

var callback = this.@com.roamtopix.client.StaticFacad.JsCallback::callback;

callback.@com.roamtopix.client.StaticFacad.JavaCallback::execute(Lcom/google/gwt/core/client/JavaScriptObject;)(jsObject);

But there's simpler.

It depends how you (intend to) use your callback though.

Have a look at https://code.google.com/p/gwt-in-the-air/source/browse/trunk/src/net/ltgt/gwt/browserplus/core/client/BrowserPlus.java#145 (the createNativeCallback method) for a way of wrapping a Java callback into a JS function to be passed as a "callback" to some API.

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