clean clear event close file open new malloc delete free class Plugin load download upload Object Observer clicked listen socket accept result request response success error final current change override array deque list map set span stack hash unordered_map unordered_set unordered_multimap unordered_multiset vector append push_back push_front pop_front pop_back insert remove begin end start stop emplace isEmpty reserve resize swap operator capacity erase sort splice split join subjoin substr continue constexpr dynamic_cast inline impl return static_assert throw typedef ifndef define using namespace typeid template find virtual while memory time type create destroy pointer shared_ptr undeclare make_shared pair initialized uninitialized container callback erasable SharedTimeLockable widget windows Abstract interface flag font color child context enabled height width top down left right Action function background store mask factory native palette geometry local tracking