I solved it.
new PropertyTreeColumn(new
ColumnLocation(Alignment.MIDDLE, 8, Unit.PROPORTIONAL),
"", "userObject.name") {
@Override
public IRenderable newCell(TreeNode node, int level)
{
if
(getTreeTable().getTreeState().isNodeSelected(node)) {
File f = new PropertyModel<File>(node,
"userObject.file").getObject();
ResourceStreamRequestTarget res = new
ResourceStreamRequestTarget(
new FileResourceStream(f), f.getName());
getRequestCycle().setRequestTarget(res);
return null;
} else {
return super.newCell(node, level);
}
}
}
and
TreeTable tree = new TreeTable("treeTable", createTreeModel(), columns);
tree.setLinkType(TreeTable.LinkType.REGULAR);
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