Group Drawable

Group.cpp

#include "Group.hpp"

Group::Group()
: m_drawables{} {

}

void Group::draw(sf::RenderTarget& target, sf::RenderStates states) const {
    for(const auto& drawable : m_drawables) {
        target.draw(drawable, states);
    }
}

const sf::Drawable& Group::operator[](std::size_t index) {
    return m_drawables[index];
}

std::size_t Group::push_back(const sf::Drawable& drawable) {
    m_drawables.push_back(drawable);
    return m_drawables.size() - 1;
}

const sf::Drawable& Group::pop_back() {
    const auto& drawable = m_drawables.back();
    m_drawables.pop_back();
    return drawable;
}

Group.hpp

#ifndef GROUP_INCLUDED_HPP
#define GROUP_INCLUDED_HPP

#include <SFML/Graphics.hpp>
#include <vector>
#include <functional>

class Group : public sf::Drawable {
public:
    Group();
    virtual ~Group() = default;

    virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const;

    const sf::Drawable& operator[](std::size_t index);
    std::size_t push_back(const sf::Drawable& drawable);
    const sf::Drawable& pop_back();

private:
    std::vector<std::reference_wrapper<const sf::Drawable>> m_drawables;
};

#endif