How to set a JFace TreeViewer with no selection allowed?

When creating a JFace TreeViewer, one can use the SWT constants to set single or multiple selections allowed for the user to the tree items (SWT.SINGLE or SWT.MULTI).

Can anyone help me please as I want a tree that its items can not be selected at all? I want it as for preview purpose and user should not be able to select an item there.

Many thanks in advance,

I don't really understand why do you want to suppress the selection, but this is how it may work:

viewer.addSelectionChangedListener(new ISelectionChangedListener() {
    @Override
    public void selectionChanged(final SelectionChangedEvent event) {
        if (!event.getSelection().isEmpty()) {
             v.setSelection(StructuredSelection.EMPTY);
        }
    }
});

In addition to this I would make sure that the viewer:

1. is not registered as the selection provider in the part's site
2. accepts no other ISelectionChangedListeners