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Unexpected resizing behaviour when fixing aspect ration in user code #468

mantognini opened this Issue Sep 17, 2013 · 0 comments


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mantognini commented Sep 17, 2013

Reported here.


#include <SFML/Graphics.hpp>

int main(int argc, char* argv[])
    sf::RenderWindow window(sf::VideoMode(800, 600), "Resize Test");

    while (window.isOpen()) {
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed)

            // Window Resized?
            if (event.type == sf::Event::Resized) {
                // The Window was Resized - Maintain Aspect Ratio
                float AspectX = window.getSize().x / 800.0f;
                float AspectY = window.getSize().y / 600.0f;
                // Find Which Is the smaller aspect
                if (AspectX < AspectY) {
                    //Resize Y To Fit
                    window.setSize({window.getSize().x, AspectX * 600});
                } else if (AspectX > AspectY) {
                    //Resize X To Fit
                    window.setSize({AspectY * 800, window.getSize().y});


    return 0;

Under OS X It resizes several times a second, very quickly the window jittering between various sizes. After some time it settles on a (correct aspect) size. I have noticed that it seems to fire the window::Resized event during OS X resizing animation.

@ghost ghost assigned mantognini Sep 17, 2013

jcowgill added a commit to jcowgill/SFML that referenced this issue Sep 22, 2014

@mantognini mantognini removed their assignment Apr 30, 2015

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