On Friday, September 6, 2013 12:54:30 PM UTC+2, Thomas Lefort wrote:
>
> Thanks! makes a lot of sense. Will try the <not> suggestion.
>
> Regarding the widget replacement, I assumed it was possible to proceed as
> I mentioned by looking at the Popup rule provided @
> http://www.gwtproject.org/doc/latest/DevGuideCodingBasicsDeferred.html
> It is true that PopupImpl is not being directly extended indeed. I will
> have to change my implementation.
>
PopupImpl *is* extended, but GWT.create() is called with PopupImpl.class as
argument (which will match the <when-type-is> rules), and depending on the
user.agent value, GWT.create() will return a new PopupImplMozilla,
PopupImplIE6 or PopupImpl instance, just as if you had written "new
PopupImpl()", "new PopupImplMozilla()" or "new PopupImplIE6()" βor
"propertyIs("user.agent",
"ie6") ? new PopupImplIE6() : propertyIs("user.agent", "gecko1_8") ? new
PopupImplMozilla() : new PopupImpl()"β, except the *binding* to the actual
class is *deferred* to quasi-runtime β compile-time, but the choice of
permutation is done at runtime, so permutations are kind of like a
grouping/factoring of all runtime choices β and more importantly, outside
your code so it can be re-configured without touching the code).
BTW, the doc needs updating to remove the "gecko" permutation, so thanks
for link ;-)
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