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https://issues.apache.org/jira/browse/WICKET-2493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12760203#action_12760203
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Juergen Donnerstag commented on WICKET-2493:
--------------------------------------------
a testcase or quickstart project would help a lot. Thanks.
> Border component's <wicket:body /> tag doesn't work within a repeater such as
> a ListView
> ----------------------------------------------------------------------------------------
>
> Key: WICKET-2493
> URL: https://issues.apache.org/jira/browse/WICKET-2493
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.4.1
> Reporter: Shu Gao
>
> Hi,
> I've been using Wicket for about a month now, I've been "practicing" with
> every aspects of it, and it just feels right and great for my needs.
> But right now, I'm running into a problem using Borders, I've consulted
> online help and other related topics, and I've done some working examples
> of using Borders as well. the <wicket:body /> tag works well if it's directly
> placed under <wicket:border> just as the examples show, and it still works
> when
> it is placed under some other simple container within <wicket:border>, like a
> link, or a WebMarkupContainer, but it won't work if it's placed under a
> repeater.
> I have a border component declared as the following:
> MyBorder.html
> <wicket:border>
> <table>
> <tr wicket:id="rows">
> <wicket:body />
> </tr>
> </table>
> </wicket:border>
> I would like my border component function as a repeating view that outputs
> table-like data, but having the outter page who uses this border to define
> the specific contents that will be rendered as each row of the table,
> something like:
> MyPage.html
> <div wicket:id="myBorder">
> <span wicket:id="myField1" />
> <hr />
> <span wicket:id="myField2" />
> </div>
> Then in my code:
> MyPage.java
> ...
> MyBorder myBorder = new MyBorder("myBorder");
> add(myBorder);
> myBorder.add( new Label("myField1", model1) );
> myBorder.add( new Label("myField2", model2) );
> ...
> MyBorder.java
> ...
> ListView lv = new ListView("rows", list)
> {
> public void populateItem(ListItem item)
> {
> }
> }
> add(lv);
> ...
> Doing this would result in an exception complaining that
> Unable to find component with id 'myField1' in [MarkupContainer [Component id
> = _body]]
> I understand that because "myField1" has to be added to the border; however,
> where do I add it? From the Border API, it stated that if the "body" is not
> an immediate child of border (example see below), than you must use code like
> the following someContainer.add(getBodyContainer()) to add the body component
> to the correct container.
> So I'm adding "myField1" in my code, like
> lv.add(myField1);
> Then I get the following exception:
> "The component [Component id = myField1] has the same wicket:id as another
> component already added at the same level"
> I also understand that I shouldn't be adding components to repeaters
> directly; instead I should be adding it to the ListItem upon each iteration,
> so I did something like:
> public void populateItem(ListItem item)
> {
> item.add( getBodyContainer() );
> }
> The way I understand the above code is that the "getBodyContainer()" method
> returns what has been specified as the body of the border component; which is
> "myField1" and "myField2" in this case.
> As for the models of the two labels, I'll use some callbacks to make sure
> each iteration returns the correct model or values for the label to display.
> It is supposed to work, at least I thought so, but Wicket then complains that
> WicketMessage: Markup element at index 5 failed to advance the markup stream
> at
> org.apache.wicket.markup.MarkupStream.throwMarkupException(MarkupStream.java:465)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1604)
> at
> org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1525)
> at org.apache.wicket.Component.renderComponent(Component.java:2626)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1536)
> at org.apache.wicket.Component.render(Component.java:2457)
> at
> org.apache.wicket.markup.html.list.ListView.renderItem(ListView.java:638)
> at
> org.apache.wicket.markup.html.list.ListView.renderChild(ListView.java:626)
> at
> org.apache.wicket.markup.repeater.AbstractRepeater.onRender(AbstractRepeater.java:103)
> at org.apache.wicket.Component.render(Component.java:2457)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1414)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1601)
> at
> org.apache.wicket.MarkupContainer.renderAssociatedMarkup(MarkupContainer.java:675)
> at
> org.apache.wicket.markup.html.border.Border.onComponentTagBody(Border.java:305)
> ...
> Then I looked at
> MarkupContainer.renderComponentTagBody(MarkupContainer.java:1604)
> and noticed that Wicket is trying to compare some kind of index...
> I am really confused at this, why the markup stream had not been advanced,
> I'm simply adding some component to the ListItem upon each iteration, did I
> do anything wrong? What should I do if I wanted to achive the above design
> using Borders? or should I use something else?
> Looking forward to an answer,
> thanks in advance!
> really appreciated!!
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