Page.tml
--------
<t:tree t:id="tree" t:model="treeModel" />
Page.java
---------
@InjectComponent Tree tree;
@Cached // use cached because this method may be called twice in a single
request
public TreeModel getTreeModel() {
...
}
public void onExpandAll() {
TreeExpansionModel expansionModel = tree.getExpansionModel();
List<TreeNode> roots = getTreeModel().getRootnodes();
// recursively iterate the TreeNodes starting at the roots and call
TreeExpansionModel.markExpanded(node);
}
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