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Graphics / Calling draw(...) on instance of class implementing Drawable

« on: January 04, 2014, 02:00:32 am »

I noticed sf::Drawable's draw(...) method is protected. Why is that? (I'm not the best C++ programmer, so pardon me if the answer's rather obvious.)


As a followup question, what is the best way to call this method from outside my implementing class, StateMenu?

Here's my parent interface:

// a state the game can be in (menu, playing, credits).
class State : public EventHandler, public sf::Drawable {
public:
        virtual void update(const sf::Time &delta) = 0;
};

Here's an implementer of that interface:

// the title menu of the game.
class StateMenu : public State {
public:
        bool handleEvent(sf::Event &event);
        void update(const sf::Time &delta);
        void draw(sf::RenderTarget &target, sf::RenderStates states) const;
       
private:
        sf::Time mTimeElapsed;
};

And here's some snippets from main.cpp:

sf::RenderWindow window(sf::VideoMode(WINDOW_WIDTH, WINDOW_HEIGHT), TITLE,
                                                sf::Style::Titlebar | sf::Style::Close);
State *state;

void render() {
        window.clear(sf::Color::Black);
        state->draw(window, sf::RenderStates::Default);
        window.display();
}

int main() {
        ...
        state = new StateMenu;
        ...
        while (window.isOpen()) {
                ...
                render();
        }
        return 0;
}

Sorry if I posted too much code, and thanks in advance for any and all help!