c/SDL2_putpixel_click/main.c

   1 //gcc -Wextra -pedantic-errors -o main.out main.c -lSDL2
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 #include <SDL2/SDL.h>
   7
   8 #define WINDOW_WIDTH 600
   9
  10 int main(void) {
  11     SDL_Event event;
  12     SDL_Renderer *renderer;
  13     SDL_Window *window;
  14     int i;
  15
  16     SDL_Init(SDL_INIT_VIDEO);
  17     SDL_CreateWindowAndRenderer(WINDOW_WIDTH, WINDOW_WIDTH, 0, &window, &renderer);
  18     //SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN_DESKTOP);
  19
  20     SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
  21     SDL_RenderClear(renderer);
  22     SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
  23
  24     for (i = 0; i < WINDOW_WIDTH; ++i)
  25       SDL_RenderDrawPoint(renderer, i, i);
  26
  27     SDL_RenderPresent(renderer);
  28
  29     int running = 1;
  30     int mouseX, mouseY;
  31     while(running) {
  32         event.type = 0;
  33         if(SDL_PollEvent(&event)) {
  34            switch(event.type){
  35              case SDL_QUIT:
  36                 running = 0;
  37                 break;
  38              case SDL_MOUSEBUTTONDOWN:
  39                 //do whatever you want to do after a mouse button was pressed,
  40                 // e.g.:
  41                 //if(event.button.button == SDL_BUTTON_LEFT) {
  42                   SDL_GetMouseState(&mouseX, &mouseY);
  43                   printf("Click %d, %d, %d\n", mouseX, mouseY, event.button.button);
  44                   SDL_RenderDrawPoint(renderer, mouseX, mouseY);
  45                   SDL_RenderPresent(renderer);
  46                 //}
  47                 break;
  48            }
  49         }
  50     }
  51     SDL_DestroyRenderer(renderer);
  52     SDL_DestroyWindow(window);
  53     SDL_Quit();
  54     return EXIT_SUCCESS;
  55 }