test/testime.c
author Jiang Jiang <gzjjgod@gmail.com>
Wed, 01 Jul 2009 16:12:00 +0000
branchgsoc2009_IME
changeset 3133 84119fe89d26
parent 3132 88861448961f
child 3134 f896821736fb
permissions -rw-r--r--
Draw cursor, underline marked text
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/* A simple program to test the Input Method support in the SDL library (1.3+) */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "SDL.h"
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#include <SDL/SDL_ttf.h>
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#define DEFAULT_PTSIZE  30
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#define DEFAULT_FONT    "DroidSansFallback.ttf"
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#define MAX_TEXT_LENGTH 256
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static void render_text(SDL_Surface *sur,
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                        TTF_Font *font,
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                        const char *text,
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                        int x, int y,
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                        SDL_Color color)
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{
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    SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, text, color);
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    SDL_Rect dest = { x, y, textSur->w, textSur->h };
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    SDL_BlitSurface(textSur, NULL, sur, &dest);
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    SDL_FreeSurface(textSur);
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}
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int main(int argc, char *argv[])
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{
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    int width, height;
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    SDL_Surface *screen;
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    TTF_Font *font;
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    width = 500, height = 250;
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    SDL_putenv("SDL_VIDEO_WINDOW_POS=center");
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    if (SDL_Init(SDL_INIT_VIDEO) < 0)
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    {
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        fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
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        return -1;
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    }
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    /* Initialize fonts */
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    TTF_Init();
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    font = TTF_OpenFont(DEFAULT_FONT, DEFAULT_PTSIZE);
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    if (! font)
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    {
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        fprintf(stderr, "Failed to find font: %s\n", SDL_GetError());
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        exit(-1);
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    }
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    atexit(SDL_Quit);
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    /* Create window */
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    screen = SDL_SetVideoMode(width, height, 32,
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                              SDL_HWSURFACE | SDL_DOUBLEBUF);
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    if (screen == NULL)
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    {
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        fprintf(stderr, "Unable to set %dx%d video: %s\n",
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                width, height, SDL_GetError());
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        return -1;
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    }
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    /* Prepare a rect for text input */
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    SDL_Rect textRect = { 100, 80, 300, 50 }, markedRect, underlineRect, cursorRect;
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    Uint32 backColor = SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF);
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    Uint32 lineColor = SDL_MapRGB(screen->format, 0x0, 0x0, 0x0);
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    SDL_Color textColor = { 0, 0, 0 };
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    SDL_FillRect(screen, &textRect, backColor);
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    markedRect = textRect;
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    SDL_StartTextInput(&markedRect);
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    SDL_Flip(screen);
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    SDL_Event event;
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    int done = 0, inputed = 0;
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    int w, h;
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    char text[MAX_TEXT_LENGTH];
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    while (! done && SDL_WaitEvent(&event))
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    {
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        switch (event.type)
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        {
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        case SDL_KEYDOWN:
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            fprintf(stderr,
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                    "Keyboard %d: scancode 0x%08X = %s, keycode 0x%08X = %s\n",
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                    event.key.which, event.key.keysym.scancode,
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                    SDL_GetScancodeName(event.key.keysym.scancode),
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                    event.key.keysym.sym, SDL_GetKeyName(event.key.keysym.sym));
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            break;
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        case SDL_TEXTINPUT:
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            fprintf(stderr, "Keyboard %d: text input \"%s\"\n",
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                    event.text.which, event.text.text);
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            if (inputed < sizeof(text))
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            {
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                strcpy(text + inputed, event.text.text);
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                inputed += strlen(event.text.text);
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            }
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            fprintf(stderr, "text inputed: %s\n", text);
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            SDL_FillRect(screen, &textRect, backColor);
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            render_text(screen, font, text, textRect.x, textRect.y, textColor);
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            TTF_SizeUTF8(font, text, &w, &h);
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            markedRect.x = textRect.x + w;
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            cursorRect = markedRect;
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            cursorRect.w = 2;
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            cursorRect.h = h;
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            SDL_FillRect(screen, &cursorRect, lineColor);
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            SDL_Flip(screen);
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            SDL_StartTextInput(&markedRect);
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            break;
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        case SDL_TEXTEDITING:
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            fprintf(stderr, "text editing \"%s\", selected range (%d, %d)\n",
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                    event.edit.text, event.edit.start, event.edit.length);
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            SDL_FillRect(screen, &markedRect, backColor);
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            render_text(screen, font, event.edit.text, markedRect.x, markedRect.y, textColor);
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            TTF_SizeUTF8(font, event.edit.text, &w, &h);
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            underlineRect = markedRect;
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            underlineRect.y += (h - 2);
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            underlineRect.h = 2;
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            underlineRect.w = w;
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            SDL_FillRect(screen, &underlineRect, lineColor);
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            SDL_Flip(screen);
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            break;
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        case SDL_QUIT:
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            done = 1;
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            break;
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        default:
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            break;
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        }
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    }
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    TTF_CloseFont(font);
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    TTF_Quit();
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    return 0;
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}
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