Question

I’m stuck on working out the correct syntax to pass the mouseX and mouseY position to my class.

My attempt was like this:

 // Start the game loop
 while (window.isOpen())
 {
     // Process events
     sf::Event event;
     while (window.pollEvent(event))
     {
         // Close window : exit
         if (event.type == sf::Event::Closed) {
             window.close();
         }
     }

     // Clear screen
     window.clear();

     // Draw the sprite
     window.draw(sprite);
     window.draw(lsprite);

     if(btn_quit.IsIn(sf::Event::MouseMoveEvent::x,sf::Event::MouseMoveEvent::y){
         btn_quit.RenderImg(window,"button_on.png");
     } else {
         btn_quit.RenderImg(window,"button.png");
     }
  ///rest of the code not relevant to this issue

This is in my class:

bool IsIn( int mouseX, int mouseY )
{
    if (((mouseX > m_x) && (mouseX < m_x + m_w)) 
    && ((mouseY > m_y) && (mouseY < m_y + m_h ) ) ) {
        return true;
    } else {
        return false;
    }
}

I keep getting an error with the inputs of x and y how ever which says this:

error C2597: illegal reference to non-static member 'sf::Event::MouseMoveEvent::x'

error C2597: illegal reference to non-static member 'sf::Event::MouseMoveEvent::y'

Answer 1

You’re trying to statically access non-static member fields of a struct. You can’t do that. Try something like this:

// Start the game loop
while (window.isOpen())
{
    // Process events
    sf::Event event;
    while (window.pollEvent(event))
    {
        // Close window : exit
        if (event.type == sf::Event::Closed) {
            window.close();
        }
        else if (event.type == sf::Event::MouseMove)
        {
            if(btn_quit.IsIn(event.MouseMoveEvent.x, event.MouseMoveEvent.x){
                btn_quit.RenderImg(window,"button_on.png");
            } else {
                btn_quit.RenderImg(window,"button.png");
            }
        }
    }

    // Clear screen
    window.clear();

    // Draw the sprite
    window.draw(sprite);
    window.draw(lsprite);