SDL T9键盘模拟-20241005

#include <SDL.h> #include <SDL_ttf.h> #include <SDL_image.h> #include <SDL_mixer.h> #include <stdio.h> //=======================窗口属性========================= #define WINDOWNAME "my window" #define SCREEN_X 100 #define SCREEN_Y 100 #define SCREEN_WIDTH 640 #define SCREEN_HEIGHT 480 //=======================色彩定义========================= //========================初始化========================== SDL_Window *Init() { SDL_Window *pScreen = NULL; //SDL初始化 if (SDL_Init(SDL_INIT_EVERYTHING) < 0) { printf ("SDL initialize fail:%s\n", SDL_GetError()); return NULL; } pScreen = SDL_CreateWindow(WINDOWNAME, SCREEN_X, SCREEN_Y, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN); if (NULL == pScreen)//检测是否初始化成功 printf ("SDL_CreateWindow fail:%s\n", SDL_GetError()); //初始化字体库 if (TTF_Init() == -1 ) printf ("TTF_Init fail:%s\n", SDL_GetError()); return pScreen; } //========================程序释放======================== void Quit() { //释放字体 TTF_Quit(); //退出SDL SDL_Quit(); } //========================加载图片======================== SDL_Texture *Load_image(const char *filename,SDL_Renderer *render) { //临时的空间 用来储存刚刚加载好的图片 SDL_Surface *loadedImage = NULL; SDL_Texture *texture = NULL; //加载图片 loadedImage=IMG_Load(filename); //如果加载图片失败 if (loadedImage == NULL) printf ("IMG_Load fail:%s", SDL_GetError()); texture = SDL_CreateTextureFromSurface(render, loadedImage); if (texture == NULL) printf("SDL_CreateTextureFromSurface fail:%s", SDL_GetError()); //释放临时的图片 SDL_FreeSurface(loadedImage); return texture; } //===================加载字体(ASCII字符)=================== SDL_Surface *Load_ttfText(const char *filename, int ptsize, const char *text, SDL_Color color) { //临时的空间 用来储存刚刚加载好的字体 TTF_Font *font; SDL_Surface *pText; //加载字体 font = TTF_OpenFont(filename, 20); //如果加载字体失败 if (font == NULL) printf ("TTF_OpenFont fail:%s", SDL_GetError()); pText = TTF_RenderText_Solid(font, text, color); //如果渲染失败 if (pText == NULL) printf ("TTF_RenderText_Solid fail:%s", SDL_GetError()); //字体指针释放 TTF_CloseFont(font); return pText; } //===================加载字体(UTF8编码)==================== SDL_Surface *Load_ttfUTF8(const char *filename, int ptsize, const char *text, SDL_Color color) { //临时的空间 用来储存刚刚加载好的字体 TTF_Font *font; SDL_Surface *pText; //加载字体 font = TTF_OpenFont(filename, 20); //如果加载字体失败 if (font == NULL) printf ("TTF_OpenFont fail:%s", SDL_GetError()); pText = TTF_RenderUTF8_Solid(font, text, color); //如果渲染失败 if (pText == NULL) printf ("TTF_RenderUTF8_Solid fail:%s", SDL_GetError()); //字体指针释放 TTF_CloseFont(font); return pText; } //===================加载字体(UCS2编码)==================== SDL_Surface *Load_ttfUNICODE(const char *filename, int ptsize, const Uint16 *text, SDL_Color color) { //临时的空间 用来储存刚刚加载好的字体 TTF_Font *font; SDL_Surface *pText; //加载字体 font = TTF_OpenFont(filename, 20); //如果加载字体失败 if (font == NULL) printf ("TTF_OpenFont fail:%s", SDL_GetError()); pText = TTF_RenderUNICODE_Solid(font, text, color); //如果渲染失败 if (pText == NULL) printf ("TTF_RenderUNICODE_Solid fail:%s", SDL_GetError()); //字体指针释放 TTF_CloseFont(font); return pText; } //========================复制渲染=========================== void Copy_render(SDL_Renderer * render, SDL_Texture *texture, int x = 0, int y = 0, int w = SCREEN_WIDTH, int h = SCREEN_HEIGHT, double angle = 0.0, int p_x = 0, int p_y = 0) { SDL_Rect rect = {x, y, w, h}; SDL_Point center = {p_x, p_y}; SDL_RenderCopyEx(render, texture, NULL, &rect, angle, &center, SDL_FLIP_NONE); } //========================获取按键=========================== int ButtonRec () //每个按键区域大小为(h = 92, w = 128),共分为20个按键 各返回值如图对应: // | 0 | 1 | 2 | 3 | 4 { // | 5 | 6 | 7 | 8 | 9 SDL_Event event; // |10 |11 |12 |13 |14 int x,y; // |15 |16|17 |18 |18 |14 if (SDL_PollEvent (&event)) { switch (event.type) { case SDL_MOUSEBUTTONDOWN: //如果发生了鼠标按键按下事件 if(event.button.button == SDL_BUTTON_LEFT) //如果是左键按下的事件，就要判断按下鼠标的时候鼠标是否处在button区域中，所以要得到鼠标坐标 { y=event.button.x; //宽 x=event.button.y-110; //高 if (x>2 && x<94 && y>0 && y<128) return 0; if (x>2 && x<94 && y>128 && y<256) return 1; if (x>2 && x<94 && y>256 && y<384) return 2; if (x>2 && x<94 && y>384 && y<512) return 3; if (x>2 && x<94 && y>512 && y<640) return 4; if (x>94 && x<186 && y>0 && y<128) return 5; if (x>94 && x<186 && y>128 && y<256) return 6; if (x>94 && x<186 && y>256 && y<384) return 7; if (x>94 && x<186 && y>384 && y<512) return 8; if (x>94 && x<186 && y>512 && y<640) return 9; if (x>186 && x<278 && y>0 && y<128) return 10; if (x>186 && x<278 && y>128 && y<256) return 11; if (x>186 && x<278 && y>256 && y<384) return 12; if (x>186 && x<278 && y>384 && y<512) return 13; if (x>186 && x<370 && y>512 && y<640) return 14; if (x>278 && x<370 && y>0 && y<64) return 15; if (x>278 && x<370 && y>64 && y<128) return 16; if (x>278 && x<370 && y>128 && y<256) return 17; if (x>278 && x<370 && y>256 && y<512) return 18; } } } return -1; } //========================显示字符=========================== void ApplyString(SDL_Renderer *render, SDL_Texture *word, SDL_Texture *keyboard, SDL_Surface *letter, char *buf, SDL_Color color, int buf_count) { letter = Load_ttfText("msyh.ttf", 60, buf, color); word = SDL_CreateTextureFromSurface(render, letter); SDL_RenderClear(render); Copy_render(render, word, 20, 30, 20*(buf_count+1),60); Copy_render(render, keyboard, 0, 110, 640,370); SDL_RenderPresent(render); } int main (int argc, char *argv[]) { char buf[100] = {}; char buttonword[][4] = {{',','.','?','!'},{'a','b','c'},{'d','e','f'},{'g','h','i'},{'j','k','l'},{'m','n','o'},{'p','q','r','s'},{'t','u','v'},{'w','x','y','z'}}; SDL_Window *window = Init(); SDL_Renderer *render = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC); SDL_SetRenderDrawColor(render,255,255,255,255); //设计底色为白 //清空渲染器 SDL_Texture *keyboard = NULL; SDL_Texture *word = NULL; SDL_Color black = {0,0,0}; SDL_Surface *letter = NULL; SDL_Event event; int flag, cnt, i = 0, j, buf_count = 0, buf_length = 1,quit = 0; keyboard = Load_image("9key_e.bmp", render); SDL_RenderClear(render); Copy_render(render, keyboard, 0, 110, 640,370); SDL_RenderPresent(render); while (!quit) { flag = 1; cnt = 0; i = 0; switch (ButtonRec()) { //9键情况处理 case 1: //包含(, . ? !) j = 0; while (flag) { printf ("%d ",i); cnt++; SDL_Delay(10); if (ButtonRec() == 1) { cnt = 0; i++; i = i%4; } if (cnt > 30) flag = 0; buf[buf_count] = buttonword[j][i]; ApplyString(render, word, keyboard, letter, buf, black, buf_count); } buf_count++; printf ("ok! "); break; case 2: //包含(a b c) j = 1; while (flag) { printf ("%d ",i); cnt++; SDL_Delay(10); if (ButtonRec() == 2) { cnt = 0; i++; i = i%3; } if (cnt > 30) flag = 0; buf[buf_count] = buttonword[j][i]; ApplyString(render, word, keyboard, letter, buf, black, buf_count); } buf_co