- Container *container;
- std::list<Slot *> slots;
- unsigned n_active_slots;
- unsigned n_slack_constraints[2];
- Sides margin;
- unsigned row_spacing;
- unsigned col_spacing;
+ Container *container = nullptr;
+ std::vector<Slot *> slots;
+ std::size_t n_active_slots = 0;
+ std::size_t n_slack_vars[2] = { 0, 0 };
+ Sides margin{ 8 };
+ unsigned row_spacing = 5;
+ unsigned col_spacing = 4;