having trouble creating copies of objects using vector push_back code - c++

Question

I'm trying duplicate the RectangleShape rect1 every time I pressed the space button, but instead of doing that, it just seems to delete my rect1 object in the vector Vec as soon as I release the space key. I can't figure out why, anybody help me please?
here is my code:
int main() {
class shape {
public:
RectangleShape rect1;
};
shape getShape;
getShape.rect1.setSize(Vector2f(100, 100));
getShape.rect1.setFillColor(Color(0, 255, 50, 30));
RenderWindow window(sf::VideoMode(800, 600), "SFML Game");
window.setFramerateLimit(60);
window.setKeyRepeatEnabled(false);
bool play = true;
Event event;
while (play == true) {
while (window.pollEvent(event)) {
if (event.type == Event::Closed) {
play = false;
}
}
window.clear();
vector <shape> Vec;
if (Keyboard::isKeyPressed(Keyboard::Space)) {
Vec.push_back(getShape);
}
for (int i = 0; i < Vec.size(); ++i) {
window.draw(Vec[i].rect1);
}
window.display();
}
window.close();
return 0;
}

Answer 1

You need to place the vector outside the loop, otherwise you create a new empty one every time:
int main() {
// If you need to use this class in something other than main,
// you will need to move it outside of main.
class shape {
public:
RectangleShape rect1;
};
// But in this particular case you don't even need a class,
// why not just use RectangleShape?
shape getShape;
getShape.rect1.setSize(Vector2f(100, 100));
getShape.rect1.setFillColor(Color(0, 255, 50, 30));
RenderWindow window(sf::VideoMode(800, 600), "SFML Game");
window.setFramerateLimit(60);
window.setKeyRepeatEnabled(false);
bool play = true;
Event event;
std::vector<shape> Vec; // Put your vector here!
// play is already a bool, so you don't need == true
while (play) {
while (window.pollEvent(event)) {
if (event.type == Event::Closed) {
play = false;
}
}
window.clear();
if (Keyboard::isKeyPressed(Keyboard::Space)) {
Vec.push_back(getShape);
}
for (int i = 0; i < Vec.size(); ++i) {
window.draw(Vec[i].rect1);
}
window.display();
}
window.close();
return 0;
}