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POExpanding Wickets TreeTable nodes when initializing a tree
 

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  1. POExpanding Wickets TreeTable nodes when initializing a tree
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    <p>I'm pretty new to wicket and I'm trying to create a simple wicket tree that holds information about mailinglists. This mailinglist is related to a certain letter.</p> <ul> <li>MailingListDto 1 <ul> <li>User 1</li> <li>User 2</li> </ul></li> <li>MailingListDto 2 <ul> <li>User 3</li> <li>User 4</li> </ul></li> </ul> <p>If we are editing an existing letter, the mailinglists related to that letter are fetched <code>into mailingListCollection</code> and the corresponding nodes on the tree should be selected and expanded. For some reason I don't seem to get this workin.</p> <p>The selected and expanded nodes do not show as selected nor expanded in the UI, but if I go through the selected nodes programmatically for example in <code>onAfterRender()</code> and log the selected and expanded values, the nodes are expanded and selected.</p> <pre> tree = new TreeTable("treeTable", treeModel, treeColumns) { @Override public void onBeforeRender() { super.onBeforeRender(); if (!mailingListCollection.isEmpty()) { for (MailingListDto mailingList : mailingListCollection) { tree.getTreeState().expandNode(mailingList); tree.getTreeState().selectNode(mailingList, true); } } tree.updateTree(); } @Override protected void onAfterRender() { super.onAfterRender(); if (LOG.isDebugEnabled()) { LOG.debug("onAfterRender: " + tree.getTreeState().getSelectedNodes().size()); for (Object obj : tree.getTreeState().getSelectedNodes()) { LOG.debug(tree.getTreeState().isNodeSelected(obj) + " " + tree.getTreeState().isNodeExpanded(obj)); } } } }; tree.setRootLess(true); tree.getTreeState().setAllowSelectMultiple(true); add(tree); </pre>
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    1. COYou may want to take this to the mailing list - I've never used the tree components and very few wicket users seem to use SO.
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    2. COEver come up with a solution for this after? I'm having a similar problem.
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      1. USpsicopoo
    3. COAs we didn't find a suitable solution for the TreeTable we ended up using a completely different approach.
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