Using vectors of non-copyable objects - c++

Question

I am trying to use sfml to build a app that is functionally running multiple windows at once. In order to do this I am trying to do what would usually be done from the while running loop inside of a function that has a for loop that goes through a vector of RenderWindows. There is another function that adds to that vector. The issue is that RenderWindows are non-copyable. Any help is appreciated.
My Vectors
vector <MakeKey::NewKey> KeyArray;
vector <sf::RenderWindow> WindowArray;
int VectorSize;
May Main
int main()
{
sf::RenderWindow window(sf::VideoMode(100, 100, 32), "Main Window", sf::Style::Default);
MakeKey MakeKey;
while (window.isOpen())
{
sf::Event event;
while (window.pollEvent(event))
{
//Key Presses
if (event.type == sf::Event::KeyPressed) {
if (event.key.code == sf::Keyboard::A)
MakeKey.DrawKey("A");
else if (event.key.code == sf::Keyboard::D)
MakeKey.DrawKey("D");
//Ect
}
if (event.type == sf::Event::Closed)
window.close();
}
MakeKey.StepWindows();
}
return EXIT_SUCCESS;
}
My StepWindows Function
void MakeKey::StepWindows()
{
for (int i{ 0 }; i > VectorSize; i++)
{
cout << "Inside Step Windows For Loop" << endl;
WindowArray[i].setActive(true);
WindowArray[i].clear(sf::Color::Transparent);
WindowArray[i].draw(KeyArray[i].Sprite);
WindowArray[i].display();
}
}
My DrawKey Function
void MakeKey::DrawKey(string input)
{
MakeKey::NewKey Key;
if (input == "A")
Key.Img.loadFromFile("Assets/Images/A.png");
else if (input == "D")
Key.Img.loadFromFile("Assets/Images/D.png");
VectorSize++;
//WindowArray.reserve(VectorSize);
//attempting to reference deleted function error
//WindowArray.emplace_back();
//same error
WindowArray[VectorSize].create(sf::VideoMode(Key.Img.getSize().x, Key.Img.getSize().y, 32), "Key", sf::Style::None);
Key.Tex.loadFromImage(Key.Img);
Key.Sprite.setTexture(Key.Tex);
KeyArray.emplace_back(move(Key));
cout << "KeyArray Has " << KeyArray.size() << " Elements\n" << "WindowArray Has " << WindowArray.size() << " Elements" << endl;
}
And My Key struct
typedef struct KeyStruct {
sf::Image Img;
sf::Texture Tex;
sf::Sprite Sprite;
}NewKey;

Answer 1

Store a pointer instead. std::unique_ptr<sf::RenderWindow> should be suitable. Initialize it with new or std::make_unique<sf::RenderWindow> (C++14).
Note that your main loop will need to be radically different as you would need to poll several windows. pollEvent is unsuitable as it blocks: if you call it on wnd1, you won’t be able to process events arriving to other windows until some event arrives to wnd1 as well.