广东高端网站建设,seo如何优化网站,网店代运营哪家公司好,厦门网站开发公司键盘检测指令#xff1a;cat /dev/input/event1 | hexdump
鼠标检测指令#xff1a;cat /dev/input/event2 | hexdump
当键盘/鼠标有输入时#xff0c;会有对应的一堆16进制输出。它其实对应着input_event结构体【24字节】。
struct input_event
{struct timeval time;_…键盘检测指令cat /dev/input/event1 | hexdump
鼠标检测指令cat /dev/input/event2 | hexdump
当键盘/鼠标有输入时会有对应的一堆16进制输出。它其实对应着input_event结构体【24字节】。
struct input_event
{struct timeval time;__u16 type;__u16 code;__s32 value;
};//获取键盘数据
#include stdio.h
#include sys/types.h
#include sys/stat.h
#include fcntl.h
#include linux/input.h
#include string.hint main(void)
{#define KEY_PATH /dev/input/event1int fd -1, ret -1;struct input_event ev;// 第1步打开设备文件fd open(KEY_PATH, O_RDONLY);if (fd 0){perror(open,error);return -1;}printf(welcome size%d.\n,sizeof(struct input_event));while (1){// 第2步读取event事件包memset(ev, 0, sizeof(struct input_event));ret read(fd, ev, sizeof(struct input_event));if (ret ! sizeof(struct input_event)){perror(read,error);close(fd);return -1;}// 第3步解析event包.printf(\n);printf([%11u] type: %3d, code: %3d, value: %3d \n,ev.time.tv_sec,ev.type,ev.code,ev.value);//type: 1:按键同步//code: 键码[a30]//value:0按键释放1按键按下,2:长按下}// 第4步关闭设备close(fd); return 0;
}//获取鼠标数据
#include X11/Xlib.h
//LDFLAGS : -lX11
int GetDisplayInfo(int *screen_width,int *screen_height)
{Display *display XOpenDisplay(NULL);if (display NULL){printf(Error: cannot open display\n);return 1;}int screen_num DefaultScreen(display);Screen *screen ScreenOfDisplay(display, screen_num);*screen_width WidthOfScreen(screen);*screen_height HeightOfScreen(screen);printf(Screen size: %dx%d pixels\n, WidthOfScreen(screen), HeightOfScreen(screen));printf(Screen resolution: %dx%d dpi\n, (int) (WidthOfScreen(screen) * 25.4 / DisplayWidthMM(display, screen_num)), (int) (HeightOfScreen(screen) * 25.4 / DisplayHeightMM(display, screen_num)));XCloseDisplay(display);return 0;
}int get_xy(int fd,struct input_event ts,int *x,int *y)
{static int nCnt 0;read(fd,ts,sizeof(ts));if(ts.type EV_ABS ts.code ABS_X){*x ts.value;nCnt (nCnt1)%3;return nCnt;}if(ts.type EV_ABS ts.code ABS_Y){*y ts.value;nCnt (nCnt1)%3;return nCnt;}return 0;
}int main(void)
{#define MOUSE_PATH /dev/input/event2int fd -1, ret -1;struct input_event ev;int data_size sizeof(struct input_event);// 第1步打开设备文件[需要权限运行]fd open(MOUSE_PATH, O_RDONLY);if (fd 0){perror(open,error);return -1;}printf(mouse test [%s],data size%d.\n,MOUSE_PATH,sizeof(struct input_event));int screen_width 0;int screen_height 0;if( GetDisplayInfo(screen_width,screen_height)0){perror(get display infoerror);return -2;}while (1){static int raw_x0;static int raw_y0;int tmp 0;tmp get_xy(fd,ev,raw_x,raw_y);if(tmp2){int curr_x 0;int curr_y 0;curr_x raw_x*screen_width/0xFFFF;curr_y raw_y*screen_height/0xFFFF;printf(mousePos: x%d,y%d.\n,curr_x,curr_y);}}close(fd); return 0;
}
方法2采用SDL2 [simplle directmedia layer] , 此方法用于GUI项目事件只针对SDL创建的窗口内有效
#include stdio.h
#include pthread.h
#include SDL2/SDL.hint main(void *arg)
{// 窗口大小int screen_w 800;int screen_h 400;// 初始化SDLif (SDL_Init(SDL_INIT_EVERYTHING)){printf(could not initialize SDL: %s\n, SDL_GetError());return -1;}SDL_Window *screen SDL_CreateWindow(SimpleSDL2, 0, 0, screen_w, screen_h, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);if (!screen){printf(could not create window: %s\n, SDL_GetError());return -1;}SDL_Event myEvent; // SDL事件int quit 0;while (!quit) // 建立事件主循环{// 注意事件只针对SDL创建的窗口内有效while (SDL_PollEvent(myEvent)) // 从队列里取出事件{// printf(event%d \n, myEvent.type);switch (myEvent.type) // 根据事件类型分门别类去处理{case SDL_QUIT: // 离开事件[点击窗口关闭]quit 1; // quit event pollbreak;case SDL_MOUSEMOTION: // 鼠标移动printf(mouseXY: %d,%d \n, myEvent.motion.x, myEvent.motion.y);break;case SDL_MOUSEBUTTONDOWN: // 鼠标点击printf(ButtonClck:%d\n, myEvent.button.button); //0:左键1:中键,2:右键break;case SDL_KEYDOWN://键盘按下// 键值表在SDL2/SDL_keycode.h文件中定义printf(KEY_DOWN:%d\n, myEvent.key.keysym.sym);break;case SDL_KEYUP://键盘释放// 键值表在SDL2/SDL_keycode.h文件中定义printf(KEY_UP:%d\n, myEvent.key.keysym.sym);break;}}}printf(quit screen_monitor_thread.! \n);exit(0);return 0;
}
