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Posted to dev@wicket.apache.org by Martin Grigorov <mg...@apache.org> on 2014/02/13 17:03:47 UTC

Check visibility of a component before Ajax render

Hi,

With the help of https://github.com/l0rdn1kk0n/wicket-clientside-logging we
identified few problems where a component has been added to the
AjaxRequestTarget for re-rendering but then wicket-ajax.js failed because
it wasn't able to find the old html element with this markup id.
The reason was that a parent component was set invisible.

I think we can add check
in org.apache.wicket.ajax.XmlAjaxResponse#writeComponent that logs an
ERROR/WARN when a component is not visible in hierarchy. This will be done
only in DEV mode to not slow down the app.

Any objections ?
Ideas what else could be checked too ?


Martin Grigorov
Wicket Training and Consulting