Re: Help on defered binding with Internet Explorer

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()" –or "propertyIs("user.agent", "ie6") ? new PopupImplIE6() : propertyIs("user.agent", "gecko1_8") ? new PopupImplMozilla() : new PopupImpl()"–, except the binding to the actual class is deferred to quasi-runtime – compile-time, but the choice of permutation is done at runtime, so permutations are kind of like a grouping/factoring of all runtime choices – 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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