action_group_->add(action,sigc::mem_fun(*this,&KeyframeActionManager::on_keyframe_properties));
if(keyframe_tree_->get_selection()->count_selected_rows()==0)
action->set_sensitive(false);
}
action_group_->add(action,sigc::mem_fun(*this,&KeyframeActionManager::on_keyframe_properties));
if(keyframe_tree_->get_selection()->count_selected_rows()==0)
action->set_sensitive(false);
}