Question

I have a class which sets up some variables to another class, but i cannot seem to get it work as i get an error.

So i have this:

---

MainMenu::MainMenu(std::map<std::string,std::string>& theme){ 
    CreateSprite Background(theme["Background"]);
}

void create(sf::RenderWindow& output){
    output.draw( Background.callback() );
}

The header for it:

---

class MainMenu
{
private:

CreateSprite Background;

public:
MainMenu(std::map<std::string, std::string>&);
void create(sf::RenderWindow&);

};

The problem is I get:

error C2512: 'CreateSprite' : no appropriate default constructor available

My class for CreateSprite is set like this:

---

CreateSprite::CreateSprite(std::string& imagefile) {

if(!image.loadFromFile(imagefile)){
    exit(2);
}

sprite = sf::Sprite(image);
}

sf::Sprite CreateSprite::callback(){
return sprite;
}

The related header for this class is:

---

class CreateSprite
{
public:

CreateSprite(std::string&);
sf::Sprite callback();

private:

sf::Texture image;
sf::Sprite  sprite;

};

What have i got incorrect ?

Answer 1

I am guessing your MainMenu has a member Background declared already, you should init it from member initializer:
change from

MainMenu::MainMenu(std::map<std::string,std::string>& theme){ 
    CreateSprite Background(theme["Background"]);
}

to

MainMenu::MainMenu(std::map<std::string,std::string>& theme)
:Background(theme["Background"])
{     
}