On Thursday, June 2, 2016 at 11:11:18 AM UTC+2, Andrew Ferguson wrote:
>
> Hi,
>
> Firstly I must say that I am not a GWT or Java developer. I have come
> across GWT because a tool I need to incorporate into a JavaScript project
> has been written in GWT, and I need to figure out how to link the two
> projects together.
>
> From looking at the documentation I see that JSNI is probably what I need.
> From the docs I have successfully created a test function inside the GWT
> project that can be called from the external JS project. However, as soon
> as I try to add parameters to pass data into the GWT project from the
> external JS, the GWT project no longer compiles.
>
> My code with no parameters that compiles successfully:
> public static int example_func() {
> return 123;
> }
>
> public static native void exportStaticMethod() /*-{
> $wnd.js_funct_equiv =
> $entry(@com.lushprojects.circuitjs1.client.CirSim::example_func());
> }-*/;
>
> My code with parameters that does not compile:
> public static int example_func(int myNum) {
> return myNum;
> }
>
> public static native void exportStaticMethod() /*-{
> $wnd.js_funct_equiv(IFI) =
> $entry(@com.lushprojects.circuitjs1.client.CirSim::example_func(IFI));
> }-*/;
>
> Additionally, I need to be able to call an external JavaScript function
> from the GWT project's code, and despite looking at the documentation, I'm
> not sure how to do this.
>
> Can anyone help me with these two problems?
>
In the JSNI, only the "@package.Class::method(paramsignature)" is special,
the rest is just JavaScript; so your JSNI should read:
$wnd.js_funct_equiv =
$entry(@com.lushprojects.curcuitjs1.client.CirSim::example_func(IFI));
(well, except that your method only takes an 'int' parameter, so the
signature should be just "I", not "IFI", which would match 'int,float,int'.
Note that you can use "(*)" instead of "(IFI)" if your method has no
overload, so you don't have to keep the signature inJSNI synchronized with
the actual method signature, could make maintenance easier)
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