Dynamic Event Handling with SDL_PushEvent()

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    "Push Event Example",
8    100, 100, 640, 480, 0
9  )};
10  SDL_Renderer* renderer = SDL_CreateRenderer(
11    window, -1, SDL_RENDERER_ACCELERATED);
12
13  SDL_Event customEvent;
14  SDL_zero(customEvent);
15  customEvent.type = SDL_USEREVENT;
16  customEvent.user.code = 1;  // Custom data
17  SDL_PushEvent(&customEvent);
18
19  bool running = true;
20  SDL_Event event;
21  while (running) {
22    while (SDL_PollEvent(&event)) {
23      if (event.type == SDL_QUIT) running = false;
24      if (event.type == SDL_USEREVENT) {
25        std::cout << "Custom event triggered "
26          "with code: " << event.user.code << "\n";
27      }
28    }
29
30    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
31    SDL_RenderClear(renderer);
32    SDL_RenderPresent(renderer);
33  }
34
35  SDL_DestroyRenderer(renderer);
36  SDL_DestroyWindow(window);
37  SDL_Quit();
38  return 0;
39}