Hi,
I would like to build a treegrid with multiple header rows, and I need to use some header row columns with the same name in a row. I try to use a HierarchicalContainer and the following code:
…
for (…) {
addContainerProperty(column, String.class, “”);
}
…
, but in the IndexedContainer has:
public boolean addContainerProperty(Object propertyId, Class<?> type, Object defaultValue) {
…
// Fails if the Property is already present
if (propertyIds.contains(propertyId)) {
return false;
}
…
}
Any idea, how can I do that?
Thanks