Disable mouse / cursor detection - c++

Question

I'm making a simple Pong game.
When I ran the program, all the moves are perfect (the moving are not too fast nor too slow).
However, when I move my cursor around, the movement are faster which making the game much harder.
while (enable_loop)
{
Ticks = SDL_GetTicks();
while (SDL_PollEvent(&any_event))
{
if (any_event.type == SDL_QUIT)
{
enable_loop = false;
}
// Process keyboard event
keyPressed = SDL_GetKeyboardState(NULL);
if (keyPressed[SDL_SCANCODE_ESCAPE])
{
enable_loop = false;
}
if (keyPressed[SDL_SCANCODE_UP] )
{
player2.Update(25);
}
if (keyPressed[SDL_SCANCODE_DOWN])
{
player2.Update(-25);
}
if (keyPressed[SDL_SCANCODE_W])
{
player1.Update(20);
}
if (keyPressed[SDL_SCANCODE_S])
{
player1.Update(-20);
}
}
Grouping.update(surface, background);
SDL_UpdateWindowSurface(window);
limitFPS(Ticks);
}
}
Note : I've tried SDL_Delay(5) but the movement are too junky and jumping around, not usable :/
This game does not require mouse and I just may plug out my mouse, but I'm asking this for my experience and knowledge purposes.
I've used SDL_ShowCursor(SDL_DISABLE), SDL_CaptureMouse(SDL_FALSE) and limit my FPS to 60.
The effect is lessen but still noticeable.
How do I disable mouse detection or any code that will stop the effect?

Answer 1

Move the keyPressed checks outside the SDL_PollEvent() loop:
while (enable_loop)
{
Ticks = SDL_GetTicks();
while (SDL_PollEvent(&any_event))
{
if (any_event.type == SDL_QUIT)
{
enable_loop = false;
}
}
// Process keyboard event
keyPressed = SDL_GetKeyboardState(NULL);
if (keyPressed[SDL_SCANCODE_ESCAPE])
{
enable_loop = false;
}
if (keyPressed[SDL_SCANCODE_UP] )
{
player2.Update(25);
}
if (keyPressed[SDL_SCANCODE_DOWN])
{
player2.Update(-25);
}
if (keyPressed[SDL_SCANCODE_W])
{
player1.Update(20);
}
if (keyPressed[SDL_SCANCODE_S])
{
player1.Update(-20);
}
Grouping.update(surface, background);
SDL_UpdateWindowSurface(window);
limitFPS(Ticks);
}
That way you're only processing keyboard input once per frame instead of once per event.