DuckDrag_Combo();
void begin_duck_drag(Duckmatic* duckmatic, const synfig::Vector& begin);
bool end_duck_drag(Duckmatic* duckmatic);
DuckDrag_Combo();
void begin_duck_drag(Duckmatic* duckmatic, const synfig::Vector& begin);
bool end_duck_drag(Duckmatic* duckmatic);