Generated vaadin-grid can't seem to utilize getItem about gwt-api-generator HOT 3 CLOSED

It's not a huge issue in this particular case, since I'm keeping a copy of the item list in GWT and can just pull from there.

However, it could pose issues if there's other JS functions that take callback functions with more than one argument as parameters.

from gwt-api-generator.

It's almost impossible to figure out the arguments of a callback. Hydrolysis does not provide that info. Also we would need to define a hight amount of functional interfaces for all possibilities.

But because we are using the JsInterop @JsFunction, we can cast different implementations and your code would be like this:

// Define the function which matches the JS signature
@JsFunction
 public interface Function2 {
     void call(Object a, Object b);
 }
// Create your Function implementation
Function2 callback = (error, object) -> {
   if (error == null) {
       // Do something with object
   }
 };

grid.getPolymerElement().addEventListener(SelectedItemsChangedEvent.NAME, event -> {
    JsArrayNumber n = grid.getSelection().selected(null, 0, 200).cast();
     if (n.length() == 1) {
       // Cast it in the method call
        grid.getItem(n.get(0), (Function)callback, false);
     }
});        

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Ah, ok. That works!

Thanks!

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