mouseevents.c

#include <SDL2/SDL.h>

int main(void) { 
    SDL_bool quit = SDL_FALSE;
    SDL_Init(SDL_INIT_VIDEO);
    SDL_Window *window = SDL_CreateWindow("Mouse events", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 800, 600, SDL_WINDOW_SHOWN);
    SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    SDL_SetRenderDrawColor(renderer, 127, 127, 127, 255);
    SDL_RenderClear(renderer);
    SDL_Event event;

    int x = -1 , y = -1, rx = -1, ry = -1, wx = -1, wy = -1 , b[5] = {0};
    while(quit == SDL_FALSE) {
        while(SDL_PollEvent(&event) > 0 ) {
            SDL_PumpEvents();
            switch(event.type) {
                case SDL_QUIT: quit = SDL_TRUE; break;
                case SDL_MOUSEWHEEL:
                    wx += event.wheel.x;
                    wy += event.wheel.y;
                    break;
                case SDL_MOUSEBUTTONUP:
                    printf("\nA mouse button was released\n");
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_LEFT))             b[0] = 0;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_RIGHT))            b[1] = 0;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_MIDDLE))           b[2] = 0;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_X1))               b[3] = 0;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_X2))               b[4] = 0;
                    break;
                case SDL_MOUSEBUTTONDOWN:
                    printf("\nA mouse button was pressed\n");
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_LEFT))             b[0] = 1;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_RIGHT))            b[1] = 1;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_MIDDLE))           b[2] = 1;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_X1))               b[3] = 1;
                    if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_X2))               b[4] = 1;
                    break;
                case SDL_MOUSEMOTION:
                    SDL_GetMouseState(&x, &y);        
                    SDL_GetRelativeMouseState(&rx, &ry);        
                    break;
            }
        }
        fprintf(stdout,
                "(x,y): (%4d,%4d): (rx,ry): (%2d,%2d) (wx, wy): (%4d,%4d) btn: %d%d%d%d%d  \r",
                           x,  y,             rx, ry,             wx, wy,      b[0], b[1], b[2], b[3], b[4]);
        fflush(stdout);
        SDL_RenderClear(renderer);
        SDL_RenderPresent(renderer);
        SDL_Delay(20);
    }
    fprintf(stdout, "\n");
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 0;
}