I responded to your post over in the Closure-compiler group, but here's an
OverlayView class that fully compiles with Closure-Compiler using only the
maps api v3 externs:
http://search.missouristate.edu/map/mobile/examples/tileoverlay_uncompressed.js
The number 1 trick is to properly export the prototypes that are required
when you extend OverlayView so that they are not renamed.
These would be:
OverlayView.onAdd
OverlayView.onRemove
OverlayView.draw
You can export any method using the following notation:
MyOverlayView.prototype.onAdd = function() {}
MyOverlayView.prototype["onAdd"] = MyOverlayView.prototype.onAdd;
If the prototype is only for export (your code never calls it directly), you
can shortcut the exporting with the following notation:
/** @this {MyOverlayView} */
MyOverlayView.prototype["onAdd"] = function() {}
The @this annotation is required to prevent a warning - without it the
compiler will think that the "this" keyword refers to the global scope. Also
note that with these OverlayView methods, you will also need the @override
annotation.
Chad Killingsworth
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