Adjust Scroll Sensitivity in SDL

1#include <SDL.h>
2#include <iostream>
3
4int main(int argc, char* argv[]) {
5  SDL_Init(SDL_INIT_VIDEO);
6  SDL_Window* window = SDL_CreateWindow(
7    "Scroll Sensitivity Example",
8    SDL_WINDOWPOS_UNDEFINED,
9    SDL_WINDOWPOS_UNDEFINED,
10    800, 600,
11    SDL_WINDOW_SHOWN
12  );
13
14  SDL_Event event;
15  bool running = true;
16  float scrollPosition = 0.0f;
17  float sensitivity = 2.0f; 
18
19  while (running) {
20    while (SDL_PollEvent(&event)) {
21      if (event.type == SDL_MOUSEWHEEL) {
22        scrollPosition += (
23          event.wheel.y * sensitivity); 
24        std::cout << "Scroll position: "
25          << scrollPosition << '\n';
26      }
27      if (event.type == SDL_QUIT) {
28        running = false;
29      }
30    }
31  }
32
33  SDL_DestroyWindow(window);
34  SDL_Quit();
35  return 0;
36}

1#include <SDL.h>
2
3#include <iostream>
4
5void HandleScrollInput(
6  SDL_MouseWheelEvent& wheel,
7  float& scrollPosition,
8  float sensitivity
9) {
10  scrollPosition += wheel.y * sensitivity;
11  std::cout << "Scroll position: "
12    << scrollPosition << '\n';  
13}
14
15int main(int argc, char* argv[]) {
16  SDL_Init(SDL_INIT_VIDEO);
17  SDL_Window* window = SDL_CreateWindow(
18    "Scroll Sensitivity Example",
19    SDL_WINDOWPOS_UNDEFINED,
20    SDL_WINDOWPOS_UNDEFINED,
21    800, 600, SDL_WINDOW_SHOWN
22  );
23
24  SDL_Event event;
25  bool running = true;
26  float scrollPosition = 0.0f;
27  float sensitivity = 2.0f;
28
29  while (running) {
30    while (SDL_PollEvent(&event)) {
31      if (event.type == SDL_MOUSEWHEEL) {
32        HandleScrollInput(
33          event.wheel, scrollPosition, sensitivity);
34      }
35      if (event.type == SDL_KEYDOWN) {
36        if (event.key.keysym.sym == SDLK_UP) {
37          sensitivity += 0.1f;  
38          std::cout << "Sensitivity increased to: "
39            << sensitivity << '\n';
40        } else if (event.key.keysym.sym == SDLK_DOWN) {
41          sensitivity -= 0.1f;  
42          std::cout << "Sensitivity decreased to: "
43            << sensitivity << '\n';
44        }
45      }
46      if (event.type == SDL_QUIT) {
47        running = false;
48      }
49    }
50  }
51
52  SDL_DestroyWindow(window);
53  SDL_Quit();
54  return 0;
55}