Clicking another button I want the hidden panel to be visible and when
i set
the visibility to true and attach the markupContainer to the
ajaxRequest, it
does not repaint it and I got an error saying the component was not
found.
Yes, without a placeholder tag for invisible components there is no DOM element
for the Javascript to find for the Ajax replacement code when the (now visible)
compopnent should be rendered.
I changed it to setOutputMarkupPlaceholderTag and this time it works. I
understand that Wicket does not have any reference to the component if
we
used setOutputMarkupid but why is this and when do we use the methods?
When you work with toggling invisibility via Ajax you need to use the
placeholder tag. The difference is that in the case where you don't output the
placeholder, and invisible component's markup will not be found by other
Javascript code traversing the DOM, which could have undesired effects based on
assumptions about the element in question.
- Tor Iver
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