add source code

CMakeLists.txt

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(sdl-event LANGUAGES C)
+find_package(SDL2 REQUIRED)
+
+add_executable(sdl-event main.c)
+
+include(GNUInstallDirs)
+install(TARGETS sdl-event
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)
+
+target_link_libraries(${PROJECT_NAME} PRIVATE SDL2::SDL2)

main.c

@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <SDL2/SDL.h>
+#define FF_QUIT_EVENT (SDL_USEREVENT + 2)
+
+int main()
+{
+    SDL_Window *window = NULL;
+    SDL_Renderer *renderer = NULL;
+
+    SDL_Init(SDL_INIT_VIDEO);
+    window = SDL_CreateWindow("SDL2 Event",
+        SDL_WINDOWPOS_UNDEFINED,
+        SDL_WINDOWPOS_UNDEFINED,
+        640,
+        480,
+        SDL_WINDOW_SHOWN | SDL_WINDOW_BORDERLESS);
+
+    if (window == NULL) {
+        printf("Could not create window: %s\n", SDL_GetError());
+        return 1;
+    }
+
+    renderer = SDL_CreateRenderer(window, -1, 0);
+
+    SDL_SetRenderDrawColor(renderer, 255, 255, 0, 255);
+
+    SDL_RenderClear(renderer);
+
+    SDL_RenderPresent(renderer);
+
+    SDL_Event event;
+    int b_exit = 0;
+    for (;;) {
+        SDL_WaitEvent(&event);
+        switch (event.type)
+        {
+        case SDL_KEYDOWN:
+            switch (event.key.keysym.sym)
+            {
+            case SDLK_a:
+                printf("user press a\n");
+                break;
+            case SDLK_s:
+                printf("user press s\n");
+                break;
+            case SDLK_q:
+                printf("user press q\n");
+                SDL_Event event_quit;
+                event_quit.type = FF_QUIT_EVENT;
+                SDL_PushEvent(&event_quit);
+                break;
+            default:
+                printf("key down 0x%x\n", event.key.keysym.sym);
+                break;
+            }
+            break;
+        case SDL_MOUSEBUTTONDOWN:
+            if (event.button.button == SDL_BUTTON_LEFT) {
+                printf("mouse left press\n");
+            }
+            else if (event.button.button == SDL_BUTTON_RIGHT) {
+                printf("mouse right press\n");
+            }
+            else {
+                printf("mouse down %d\n", event.button.button);
+            }
+            break;
+        case SDL_MOUSEMOTION:
+            printf("mouse movie pos(%d,%d)\n", event.button.x, event.button.y);
+            break;
+        case FF_QUIT_EVENT:
+            printf("receive quit event\n");
+            b_exit = 1;
+            break;
+        default:
+            break;
+        }
+
+        if (b_exit)
+            break;
+        
+    }
+
+    if (renderer)
+        SDL_DestroyRenderer(renderer);
+
+    if (window)
+        SDL_DestroyWindow(window);
+
+    SDL_Quit();
+    return 0;
+}