[Dev] calling javascript methods in an external js file from gwt JSNI native mthods

[Awanthika Senarath]

Hi all,

I am trying to do $Subject.

 When the JavaScript method is in the  of html file itself  I can
call the method from module load as a native method using JSN [1]I. But
when i refer to the js file from html page [2]  and put the method in to
the js file i get the following gwt error[3]. Has anyone ever attempted
anything similar and achieved it successfully?

[1]   in java class
public static native void gwtjsPlumbDemo() /*-{

  $wnd.gwtjsplumbdemo();

 }-*/;


[2] in gwtjsplumbdemo.js file
 function gwtjsplumbdemo() {
alert("Success!!!");
}
 in html
 




[2] [115:32:19.737 [ERROR] [gwtjsplumb] Unable to load module entry point
class com.wso2.codenvy.client.GWTJsplumb (see associated exception for
details)
com.google.gwt.core.client.JavaScriptException: (TypeError)
@com.wso2.codenvy.client.GWTJsplumb::gwtjsPlumbDemo()([]): Object doesn't
support property or method 'gwtjsplumbdemo'
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:249)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:576)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:304)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
at com.wso2.codenvy.client.GWTJsplumb.gwtjsPlumbDemo(GWTJsplumb.java)
at com.wso2.codenvy.client.GWTJsplumb.onModuleLoad(GWTJsplumb.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:411)
at
com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:526)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Unknown Source)

thanks and regards


Awanthika Senarath
Software Engineer, WSO2 Inc.
Mobile: +94717681791
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Re: [Dev] calling javascript methods in an external js file from gwt JSNI native mthods

[Sohani Weerasinghe]

Can you try the option available at [1] where it uses ScriptResources for
ClientBundle instead of  tags.

[1] https://plus.google.com/u/0/+RayCromwell/posts/g3TmFeao8kK

Thanks,
Sohani

Sohani Weerasinghe
Software Engineer
WSO2, Inc: http://wso2.com

Mobile  : +94 716439774
Blog :http://christinetechtips.blogspot.com/
Twitter  : https://twitter.com/sohanichristine


On Wed, Sep 3, 2014 at 4:41 PM, Awanthika Senarath 
wrote:

> Hi all,
>
> I am trying to do $Subject.
>
>  When the JavaScript method is in the  of html file itself  I can
> call the method from module load as a native method using JSN [1]I. But
> when i refer to the js file from html page [2]  and put the method in to
> the js file i get the following gwt error[3]. Has anyone ever attempted
> anything similar and achieved it successfully?
>
> [1]   in java class
> public static native void gwtjsPlumbDemo() /*-{
>
>   $wnd.gwtjsplumbdemo();
>
>  }-*/;
>
>
> [2] in gwtjsplumbdemo.js file
>  function gwtjsplumbdemo() {
> alert("Success!!!");
> }
>  in html
>