Hacked around text input

Ewwww/yay!

c/sdl/hello_sdl.c

@@ -1,7 +1,15 @@
// Playing around with SDL + TTF.
//
// Resources:
// - http://wiki.libsdl.org/CategoryAPI
// - https://www.libsdl.org/projects/SDL_ttf/docs/SDL_ttf.html
#include <sys/param.h>
#include <SDL.h>
#include <SDL_ttf.h>
char *font_file = "./NotoColorEmoji.ttf";
char *font_file = "./FantasqueSansMono-Regular.ttf";
int main(int argc, char *argv[]) {
	printf("hello, world!\n");
@@ -41,13 +49,7 @@ int main(int argc, char *argv[]) {
	SDL_Surface *surface = SDL_GetWindowSurface(window);
	char *msg = "🐘";
	// thanks to https://stackoverflow.com/questions/22886500/how-to-render-text-in-sdl2 for some actually useful code here
	SDL_Color white = {255, 255, 255, 255};
	SDL_Color black = {0, 0, 0};
	SDL_Surface* text = TTF_RenderUTF8_Shaded(font, msg, white, black);
	SDL_BlitSurface(text, NULL, surface, NULL);
	char msg[100] = "howdy there, enby! 🐘                                          ";
	// monospace -> fixed width (duh)
	int advance = 0;
@@ -56,14 +58,49 @@ int main(int argc, char *argv[]) {
		printf("advance '%c': %d\n", msg[i], advance);
	}
	SDL_StartTextInput();
	int pos = 0;
	int max_chars = MIN(surface->w / advance, sizeof(msg));
	SDL_bool quit = SDL_FALSE;
	SDL_Event event;
	while (1) {
		SDL_PollEvent(&event);
		if (event.type == SDL_QUIT || (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE)) {
			printf("quit received\n");
			break;
	while (!quit) {
		while(SDL_PollEvent(&event)) {
			if (event.type == SDL_QUIT || (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE)) {
				printf("quit received\n");
				quit = SDL_TRUE;
				break;
			}
			if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_BACKSPACE) {
				if (pos == 0) {
					pos = max_chars-1;
				} else {
					pos = (pos - 1) % (max_chars - 1);
				}
				msg[pos] = '_';
				printf("back to %d\n", pos);
				continue;
			}
			if (event.type == SDL_TEXTINPUT) {
				if (strlen(event.text.text) > 0) {
					printf("key: %s\n", event.text.text);
					msg[pos] = event.text.text[0];
					pos = (pos + 1) % (max_chars - 1);
				}
			}
		}
		// thanks to https://stackoverflow.com/questions/22886500/how-to-render-text-in-sdl2 for some actually useful code here
		SDL_Color white = {255, 255, 255, 255};
		SDL_Color black = {0, 0, 0};
		SDL_Surface* text = TTF_RenderUTF8_Shaded(font, msg, white, black);
		SDL_BlitSurface(text, NULL, surface, NULL);
		SDL_UpdateWindowSurface(window);
		SDL_Delay(16);
	}