/* A simple program to test the Input Method support in the SDL library (1.3+) */

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include "SDL.h"

#include <SDL/SDL_ttf.h>

#define DEFAULT_PTSIZE  30

#define DEFAULT_FONT    "DroidSansFallback.ttf"

#define MAX_TEXT_LENGTH 256

static void render_text(SDL_Surface *sur,

                        TTF_Font *font,

                        const char *text,

                        int x, int y,

                        SDL_Color color)

{

    SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, text, color);

    SDL_Rect dest = { x, y, textSur->w, textSur->h };

    SDL_BlitSurface(textSur, NULL, sur, &dest);

    SDL_FreeSurface(textSur);

}

int main(int argc, char *argv[])

{

    int width, height;

    SDL_Surface *screen;

    TTF_Font *font;

    width = 500, height = 250;

    SDL_putenv("SDL_VIDEO_WINDOW_POS=center");

    if (SDL_Init(SDL_INIT_VIDEO) < 0)

    {

        fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());

        return -1;

    }

    /* Initialize fonts */

    TTF_Init();

    font = TTF_OpenFont(DEFAULT_FONT, DEFAULT_PTSIZE);

    if (! font)

    {

        fprintf(stderr, "Failed to find font: %s\n", SDL_GetError());

        exit(-1);

    }

    atexit(SDL_Quit);

    /* Create window */

    screen = SDL_SetVideoMode(width, height, 32,

                              SDL_HWSURFACE | SDL_DOUBLEBUF);

    if (screen == NULL)

    {

        fprintf(stderr, "Unable to set %dx%d video: %s\n",

                width, height, SDL_GetError());

        return -1;

    }

    /* Prepare a rect for text input */

    SDL_Rect textRect = { 100, 80, 300, 50 }, markedRect;

    Uint32 backColor = SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF);

    SDL_Color textColor = { 0, 0, 0 };

    SDL_FillRect(screen, &textRect, backColor);

    markedRect = textRect;

    SDL_StartTextInput(&markedRect);

    SDL_Flip(screen);

    SDL_Event event;

    int done = 0, inputed = 0;

    int w, h;

    char text[MAX_TEXT_LENGTH];

    while (! done && SDL_WaitEvent(&event))

    {

        switch (event.type)

        {

        case SDL_KEYDOWN:

            fprintf(stderr,

                    "Keyboard %d: scancode 0x%08X = %s, keycode 0x%08X = %s\n",

                    event.key.which, event.key.keysym.scancode,

                    SDL_GetScancodeName(event.key.keysym.scancode),

                    event.key.keysym.sym, SDL_GetKeyName(event.key.keysym.sym));

            break;

        case SDL_TEXTINPUT:

            fprintf(stderr, "Keyboard %d: text input \"%s\"\n",

                    event.text.which, event.text.text);

            if (inputed < sizeof(text))

            {

                strcpy(text + inputed, event.text.text);

                inputed += strlen(event.text.text);

            }

            fprintf(stderr, "text inputed: %s\n", text);

            SDL_FillRect(screen, &textRect, backColor);

            render_text(screen, font, text, textRect.x, textRect.y, textColor);

            TTF_SizeUTF8(font, text, &w, &h);

            markedRect.x = textRect.x + w;

            SDL_Flip(screen);

            SDL_StartTextInput(&markedRect);

            break;

        case SDL_QUIT:

            done = 1;

            break;

        default:

            break;

        }

    }

    TTF_CloseFont(font);

    TTF_Quit();

    return 0;

}