test/testime.c
author Jiang Jiang <gzjjgod@gmail.com>
Thu, 06 Aug 2009 08:53:00 +0000
branchgsoc2009_IME
changeset 3134 f896821736fb
parent 3133 84119fe89d26
child 3136 962357f325e1
permissions -rw-r--r--
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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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SDL_Surface *screen;
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TTF_Font *font;
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SDL_Rect textRect, markedRect;
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Uint32 lineColor, backColor;
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SDL_Color textColor = { 0, 0, 0 };
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char text[MAX_TEXT_LENGTH], *markedText;
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void InitVideo(int argc, char *argv[])
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{
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    int 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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        exit(-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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    int flags = SDL_HWSURFACE;
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    if (argc > 1 && strcmp(argv[1], "--fullscreen") == 0)
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    {
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        SDL_DisplayMode mode;
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        SDL_GetDesktopDisplayMode(&mode);
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        width = mode.w;
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        height = mode.h;
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        fprintf(stderr, "%dx%d\n", width, height);
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        flags |= SDL_FULLSCREEN;
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    }
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    /* Create window */
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    screen = SDL_SetVideoMode(width, height, 32, flags);
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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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        exit(-1);
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    }
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}
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void CleanupVideo()
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{
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    TTF_CloseFont(font);
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    TTF_Quit();
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}
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void InitInput()
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{
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    backColor = SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF);
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    lineColor = SDL_MapRGB(screen->format, 0x0, 0x0, 0x0);
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    /* Prepare a rect for text input */
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    textRect.x = textRect.y = 100;
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    textRect.w = screen->w - 2 * textRect.x;
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    textRect.h = 50;
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    text[0] = 0;
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    markedRect = textRect;
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    markedText = NULL;
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}
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static void RenderText(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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void Redraw()
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{
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    int w = 0, h = textRect.h;
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    SDL_Rect cursorRect, underlineRect;
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    SDL_FillRect(screen, &textRect, backColor);
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    if (strlen(text))
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    {
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        RenderText(screen, font, text, textRect.x, textRect.y, textColor);
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        TTF_SizeUTF8(font, text, &w, &h);
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    }
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    markedRect.x = textRect.x + w;
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    markedRect.w = textRect.w - w;
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    if (markedRect.w < 0)
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    {
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        SDL_Flip(screen);
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        return;
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    }
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    SDL_FillRect(screen, &markedRect, backColor);
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    if (markedText)
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    {
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        RenderText(screen, font, markedText, markedRect.x, markedRect.y, textColor);
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        TTF_SizeUTF8(font, markedText, &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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    }
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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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}
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void
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HotKey_ToggleFullScreen(void)
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{
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    SDL_Surface *screen;
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    screen = SDL_GetVideoSurface();
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    if (SDL_WM_ToggleFullScreen(screen)) {
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        printf("Toggled fullscreen mode - now %s\n",
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               (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed");
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    } else {
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        printf("Unable to toggle fullscreen mode\n");
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    }
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}
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int main(int argc, char *argv[])
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{
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    InitVideo(argc, argv);
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    InitInput();
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    Redraw();
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    SDL_Event event;
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    int done = 0;
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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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            if (event.key.keysym.sym == SDLK_ESCAPE) {
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                done = 1;
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                break;
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            }
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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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            if (strlen(event.text.text) == 0 || event.text.text[0] == '\n' ||
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                markedRect.w < 0)
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                break;
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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 (strlen(text) + strlen(event.text.text) < sizeof(text))
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                strcpy(text + strlen(text), event.text.text);
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            fprintf(stderr, "text inputed: %s\n", text);
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            // After text inputed, we can clear up markedText because it
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            // is committed
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            markedText = NULL;
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            Redraw();
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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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            markedText = event.edit.text;
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            Redraw();
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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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    CleanupVideo();
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    return 0;
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}
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