if (_matrix->visible_columns()) {
PortGroup::BundleList c = _matrix->visible_columns()->bundles ();
for (PortGroup::BundleList::iterator i = c.begin(); i != c.end(); ++i) {
(*i)->bundle->Changed.connect (_bundle_connections, invalidator (*this), boost::bind (&PortMatrixBody::rebuild_and_draw_column_labels, this), gui_context());
}
}
if (_matrix->visible_columns()) {
PortGroup::BundleList c = _matrix->visible_columns()->bundles ();
for (PortGroup::BundleList::iterator i = c.begin(); i != c.end(); ++i) {
(*i)->bundle->Changed.connect (_bundle_connections, invalidator (*this), boost::bind (&PortMatrixBody::rebuild_and_draw_column_labels, this), gui_context());
}
}