怎么做倒计时网站,手机网站建设 jz.woonl,国外最好的设计网站,seo外包怎么收费文章目录 事件相关的函数和数据结构用户自定义事件代码相关#xff1a; 事件相关的函数和数据结构
SDL_WaitEvent :等待一个事件SDL_PushEvent 发送一个事件SDL_PumpEvents(): 将硬件设备产生的时间放入事件队列 #xff0c;用于读取事件#xff0c;在调用该函数之前#… 文章目录 事件相关的函数和数据结构用户自定义事件代码相关 事件相关的函数和数据结构
SDL_WaitEvent :等待一个事件SDL_PushEvent 发送一个事件SDL_PumpEvents(): 将硬件设备产生的时间放入事件队列 用于读取事件在调用该函数之前必须调用SDL_PumpEVents搜集键盘等事件SDL_PeepEvents() 从事件队列提取一个事件 -数据结构 SDL_Event 代表一个事件
可以监控到的事件在SDL_events.h文件里面可以找到
用户自定义事件
#define FF_QUIT_EVENT (SDL_USEREVENT 2) // 用户自定义事件
代码相关
TEMPLATE app
CONFIG console thread
CONFIG - app_bundle
CONFIG - qtSOURCES \main.cINCLUDEPATH \$$PWD/../SDL2-2.0.10/include/LIBS \$$PWD/../SDL2-2.0.10/lib/x86/SDL2.lib
main.c
#include SDL.h
#include stdio.h
#define FF_QUIT_EVENT (SDL_USEREVENT 2) // 用户自定义事件
#undef main
int main(int argc, char *argv[]) {SDL_Window *window NULL; // Declare a pointerSDL_Renderer *renderer NULL;SDL_Init(SDL_INIT_VIDEO); // Initialize SDL2// Create an application window with the following settings:window SDL_CreateWindow(An SDL2 window, // window titleSDL_WINDOWPOS_UNDEFINED, // initial x positionSDL_WINDOWPOS_UNDEFINED, // initial y position640, // width, in pixels480, // height, in pixelsSDL_WINDOW_SHOWN | SDL_WINDOW_BORDERLESS // flags - see below);// Check that the window was successfully createdif (window NULL) {// In the case that the window could not be made...printf(Could not create window: %s\n, SDL_GetError());return 1;}/* We must call SDL_CreateRenderer in order for draw calls to affect this window. */renderer SDL_CreateRenderer(window, -1, 0);/* Select the color for drawing. It is set to red here. */SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);/* Clear the entire screen to our selected color. */SDL_RenderClear(renderer);/* Up until now everything was drawn behind the scenes.This will show the new, red contents of the window. */SDL_RenderPresent(renderer);SDL_Event event;int b_exit 0;for (;;) {SDL_WaitEvent(event);switch (event.type) {case SDL_KEYDOWN: /* 键盘事件 */switch (event.key.keysym.sym) {case SDLK_a:printf(key down a\n);break;case SDLK_s:printf(key down s\n);break;case SDLK_d:printf(key down d\n);break;case SDLK_q:printf(key down q and push quit event\n);SDL_Event event_q;event_q.type FF_QUIT_EVENT;SDL_PushEvent(event_q);break;default:printf(key down 0x%x\n, event.key.keysym.sym);break;}break;case SDL_MOUSEBUTTONDOWN: /* 鼠标按下事件 */if (event.button.button SDL_BUTTON_LEFT) {printf(mouse down left\n);} else if (event.button.button SDL_BUTTON_RIGHT) {printf(mouse down right\n);} else {printf(mouse down %d\n, event.button.button);}break;case SDL_MOUSEMOTION: /* 鼠标移动事件 */printf(mouse movie (%d,%d)\n, event.button.x, event.button.y);break;case FF_QUIT_EVENT://如果是收到自定义的退出信号 则退出接受事件的循环printf(receive quit event\n);b_exit 1;break;}if (b_exit)break;}// destory rendererif (renderer)SDL_DestroyRenderer(renderer);// Close and destroy the windowif (window)SDL_DestroyWindow(window);// Clean upSDL_Quit();return 0;
}
