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General / Visual Studio 17 Black RenderWindow

« on: March 03, 2022, 10:18:03 pm »

I'm trying to get a sample project working for the University C++ courses I teach.  I've used SFML in my courses before. It's just supposed to open a window with white background, and then draw a blue circle in the middle.  I have it working fine on Windows with MinGW64 and CLion using binaries downloaded from sfml-dev.org. I have it working on MacOS with CLion using command line cmake.  I can't get it to work on Windows with Visual Studio 17, I only get a black window.  I'm using the same cpp file.  I've tried binaries with static and non-static linking.  I've built the libraries using cmake-gui and VS 17 and tried static linking.  Same results.  Any ideas?

Here's my code:

#include <SFML/Graphics.hpp>

// Global Defines
// --------------------------------------------------------
const int WINDOW_WIDTH = 640;
const int WINDOW_HEIGHT = 480;

const sf::Color WINDOW_COLOR = sf::Color::White;
const sf::Color BALL_COLOR = sf::Color::Blue;

int main() {

    // create a 2d graphics window
    sf::RenderWindow window(sf::VideoMode(WINDOW_WIDTH, WINDOW_HEIGHT), "Hello SFML");
    window.clear(WINDOW_COLOR);

    sf::CircleShape ball;
    ball.setRadius(20);
    ball.setOrigin(10.0, 10.0);
    ball.setPosition(WINDOW_WIDTH / 2.0, WINDOW_HEIGHT / 2.0);
    ball.setFillColor(BALL_COLOR);

    while (window.isOpen())
    {
        // Process user input
        // ------------------------------------------------
        sf::Event event;
        while (window.pollEvent(event))
        {
            // "close requested" event: we close the window
            if (event.type == sf::Event::Closed)
                window.close();
        }

        // Render drawing objects
        // ------------------------------------------------
        window.clear(WINDOW_COLOR);
        window.draw(ball);
        window.display();
    }
    return 0;
}