/* * This example code lets the user copy and paste with the system clipboard. * * This only handles text, but SDL supports other data types, too. * * This code is public domain. Feel free to use it for any purpose! */ #define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */ #include #include #include "../../save-rendering-to-bitmaps.h" /* We will use this renderer to draw into this window every frame. */ static SDL_Window *window = NULL; static SDL_Renderer *renderer = NULL; static const char *copybuttonstr = "Click here to copy!"; static const char *pastebuttonstr = "Click here to paste!"; static SDL_FRect currenttimerect; static SDL_FRect copybuttonrect; static SDL_FRect pastetextrect; static SDL_FRect pastebuttonrect; static bool copy_pressed = false; static bool paste_pressed = false; static char current_time[64]; static char *pasted_str = NULL; static void CalculateCurrentTimeString(void) { SDL_Time ticks = 0; SDL_DateTime dt; if (!SDL_GetCurrentTime(&ticks) || !SDL_TimeToDateTime(ticks, &dt, true)) { SDL_snprintf(current_time, sizeof (current_time), "(Don't know the current time, sorry.)"); } else { static const char *month[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; static const char *day[7] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" }; SDL_snprintf(current_time, sizeof (current_time), "%s, %s %d, %d %02d:%02d:%02d", day[dt.day_of_week], month[dt.month-1], dt.day, dt.year, dt.hour, dt.minute, dt.second); } } /* This function runs once at startup. */ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) { SDL_SetAppMetadata("Example Misc Clipboard", "1.0", "com.example.misc-clipboard"); if (!SDL_Init(SDL_INIT_VIDEO)) { SDL_Log("Couldn't initialize SDL: %s", SDL_GetError()); return SDL_APP_FAILURE; } if (!SDL_CreateWindowAndRenderer("examples/misc/clipboard", 640, 480, 0, &window, &renderer)) { SDL_Log("Couldn't create window/renderer: %s", SDL_GetError()); return SDL_APP_FAILURE; } CalculateCurrentTimeString(); /* set up the locations where we'll draw stuff. */ currenttimerect.x = 30; currenttimerect.y = 10; currenttimerect.w = 390; currenttimerect.h = SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE + 10; copybuttonrect.x = currenttimerect.x + currenttimerect.w + 30; copybuttonrect.y = currenttimerect.y; copybuttonrect.w = (SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(copybuttonstr)) + 10; copybuttonrect.h = currenttimerect.h; pastetextrect.x = 10; pastetextrect.y = currenttimerect.y + currenttimerect.h + 10; pastetextrect.w = 620; pastetextrect.h = ((480 - pastetextrect.y) - copybuttonrect.h) - 20; pastebuttonrect.w = (SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(pastebuttonstr)) + 10; pastebuttonrect.x = (640 - pastebuttonrect.w) / 2.0f; pastebuttonrect.y = pastetextrect.y + pastetextrect.h + 10; pastebuttonrect.h = copybuttonrect.h; return SDL_APP_CONTINUE; /* carry on with the program! */ } /* This function runs when a new event (mouse input, keypresses, etc) occurs. */ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) { if (event->type == SDL_EVENT_QUIT) { return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */ } else if (event->type == SDL_EVENT_MOUSE_BUTTON_DOWN) { if (event->button.button == SDL_BUTTON_LEFT) { const SDL_FPoint p = { event->button.x, event->button.y }; copy_pressed = SDL_PointInRectFloat(&p, ©buttonrect); paste_pressed = SDL_PointInRectFloat(&p, &pastebuttonrect); } } else if (event->type == SDL_EVENT_MOUSE_BUTTON_UP) { if (event->button.button == SDL_BUTTON_LEFT) { const SDL_FPoint p = { event->button.x, event->button.y }; if (copy_pressed && SDL_PointInRectFloat(&p, ©buttonrect)) { SDL_SetClipboardText(current_time); } else if (paste_pressed && SDL_PointInRectFloat(&p, &pastebuttonrect)) { SDL_free(pasted_str); pasted_str = SDL_GetClipboardText(); } copy_pressed = paste_pressed = false; } } return SDL_APP_CONTINUE; /* carry on with the program! */ } static void RenderPastedText(void) { char *str = pasted_str; if (str) { float x = pastetextrect.x + 5; float y = pastetextrect.y + 5; const float w = pastetextrect.w - 10; const float h = pastetextrect.h; const size_t max_chars_per_line = (size_t) (w / SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE); char *newline; size_t slen; char ch; /* this doesn't wordwrap, or deal with Unicode....this is just a simple example app! */ while ((newline = SDL_strchr(str, '\n')) != NULL) { const bool ignore_cr = ((newline > str) && (newline[-1] == '\r')); if (ignore_cr) { newline[-1] = '\0'; } *newline = '\0'; slen = SDL_strlen(str); /* length to end of line. */ slen = SDL_min(slen, max_chars_per_line); ch = str[slen]; str[slen] = '\0'; SDL_RenderDebugText(renderer, x, y, str); str[slen] = ch; if (ignore_cr) { newline[-1] = '\r'; } *newline = '\n'; str = newline + 1; y += (SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE + 2); if ((h - y) < SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) { break; // no space for another line, stop here. } } /* last text after newline, if there's room. */ if ((h - y) >= SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) { slen = SDL_strlen(str); /* length to end of line. */ slen = SDL_min(slen, max_chars_per_line); ch = str[slen]; str[slen] = '\0'; SDL_RenderDebugText(renderer, x, y, str); str[slen] = ch; } } } /* This function runs once per frame, and is the heart of the program. */ SDL_AppResult SDL_AppIterate(void *appstate) { float x, y; CalculateCurrentTimeString(); SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); /* black */ SDL_RenderClear(renderer); /* draw a frame around the current time. */ SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255); SDL_RenderFillRect(renderer, ¤ttimerect); SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderRect(renderer, ¤ttimerect); /* draw the current time inside the frame. */ x = currenttimerect.x + ((currenttimerect.w - (SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(current_time))) / 2.0f); y = currenttimerect.y + 5; SDL_SetRenderDrawColor(renderer, 255, 255, 0, 255); SDL_RenderDebugText(renderer, x, y, current_time); /* draw a frame for the "copy the current time to the clipboard" button. */ if (copy_pressed) { SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255); } else { SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255); } SDL_RenderFillRect(renderer, ©buttonrect); SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderRect(renderer, ©buttonrect); /* draw the "copy this text" button string. */ SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderDebugText(renderer, copybuttonrect.x + 5, copybuttonrect.y + 5, copybuttonstr); /* draw a frame for the pasted text area. */ SDL_SetRenderDrawColor(renderer, 0, 53, 25, 255); SDL_RenderFillRect(renderer, &pastetextrect); SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderRect(renderer, &pastetextrect); /* draw pasted text. */ SDL_SetRenderDrawColor(renderer, 0, 219, 107, 255); RenderPastedText(); /* draw a frame for the "paste from the clipboard" button. */ if (paste_pressed) { SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255); } else { SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255); } SDL_RenderFillRect(renderer, &pastebuttonrect); SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderRect(renderer, &pastebuttonrect); /* draw the "paste some text" button string. */ SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderDebugText(renderer, pastebuttonrect.x + 5, pastebuttonrect.y + 5, pastebuttonstr); /* put the new rendering on the screen. */ SDL_RenderPresent(renderer); return SDL_APP_CONTINUE; /* carry on with the program! */ } /* This function runs once at shutdown. */ void SDL_AppQuit(void *appstate, SDL_AppResult result) { SDL_free(pasted_str); /* SDL will clean up the window/renderer for us. */ }