isVisibleInHierarchy doesn't make to much sense because it has to be
visible already because the parent is already rendering and passing
its render to the childs. So the parent is already checked for
visiblility.
what you seem to have is more another bug that something
is not created or tried to rendered that is already removed by another
request
On 6/13/07, Alex Objelean <[EMAIL PROTECTED]> wrote:
>
> I have a question about the render method. Why, before rendering, instead of
> checking isVisibleInHierarchy(), isVisible() is called?
> public final void render(final MarkupStream markupStream)
> {
> setMarkupStream(markupStream);
> setFlag(FLAG_IS_RENDERED_ONCE, true);
>
> // Determine if component is visible using it's authorization
> status
> // and the isVisible property.
> if (isRenderAllowed() && isVisible()) //why not
> isVisibleInHierarchy() ??
> {
> //etc...
> }
> //more code.
> }
>
> I am asking because I suspect a bug with the following StackTrace:
>
> Caused by: java.lang.NullPointerException
> at wicket.markup.html.list.ListView.renderItem(ListView.java:676)
> at wicket.markup.html.list.ListView.onRender(ListView.java:637)
>
> I happens when an AjaxTabbedPanel is updated via ajax. The tabbedPanel
> contains a holder Panel with a ListView child component. The visibility of
> the holder Panel is decided dynamicaly by overriding isVisible method.
>
> Maybe later I will try to isolate this situation and to make it more clear.
> Still, I would like to know if you've encountered something like this.
>
> Thank you!
> --
> View this message in context:
> http://www.nabble.com/-Question--render%28final-MarkupStream-markupStream%29-tf3914413.html#a11098575
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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