+void
+ContentSubPanel::setup_refer_button (wxCheckBox* button, shared_ptr<DCPContent> dcp, bool can_reference, list<string> why_not) const
+{
+ button->Enable (can_reference);
+
+ wxString s;
+ if (!dcp) {
+ s = _("No DCP selected.");
+ } else if (!can_reference) {
+ s = _("Cannot reference this DCP. ");
+ BOOST_FOREACH (string i, why_not) {
+ s += std_to_wx(i) + wxT(" ");
+ }
+ }
+ button->SetToolTip (s);
+}