class TestPopupSubMenu
		: public Wt::WApplication
	{
	public:
		TestPopupSubMenu( const Wt::WEnvironment& env )
			: Wt::WApplication( env )
		{
			auto b = root()->addNew< Wt::WPushButton >( "show WPopupMenu" );
			b->clicked().connect( [=]( const Wt::WMouseEvent& me )
			{
				auto popup = root()->addChild(std::make_unique<Wt::WPopupMenu>());
				auto item = popup->addItem( "0" );
				item->triggered().connect( [=]
				{
					root()->addNew< Wt::WBreak >();
					root()->addNew< Wt::WLabel >( "triggered 0" );
				});
				auto sub = std::make_unique< Wt::WPopupMenu >();
				auto subItem = sub->addItem( "1" );
				subItem->triggered().connect( [=]
				{
					root()->addNew< Wt::WBreak >();
					root()->addNew< Wt::WLabel >( "triggered 1" );
				});
				item->setMenu( std::move( sub ) );
				item->setSelectable( true );
				popup->popup( me );
			});
		}
	};