如何在 SFML 2.5 中调整窗口大小时保持窗口纵横比？

Question

我想知道是否有办法在调整窗口大小的同时保持窗口的纵横比，就像在 Photoshop 中缩放图层并按 shift 时一样。

Answer 1

我终于设法做我想做的事。我听sf::Event::Resized 并调用sf::Window::setSize 然后我改编了this post 的代码，看起来像这样：

// set screen size
float screenWidth = 800.f;
float screenHeight = 600.f;
// get the resized size
sf::Vector2u size = _window.getSize();
// setup my wanted aspect ratio
float  heightRatio = screenHeight / screenWidth;
float  widthRatio = screenWidth / screenHeight;
// adapt the resized window to my wanted aspect ratio
if (size.y * widthRatio <= size.x)
{
    size.x = size.y * widthRatio;
}
else if (size.x * heightRatio <= size.y)
{
    size.y = size.x * heightRatio;
}
// set the new size
_window.setSize(size);