This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
testime.c
1
/* A simple program to test the Input Method support in the SDL library (1.3+) */
3
4
5
6
7
8
9
10
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "SDL.h"
#ifdef HAVE_SDL_TTF
#include "SDL_ttf.h"
#endif
12
#define DEFAULT_PTSIZE 30
13
14
15
16
17
#ifdef __QNXNTO__
#define DEFAULT_FONT "/usr/photon/font_repository/tt0003m_.ttf"
#else
#define DEFAULT_FONT "/System/Library/Fonts/华文细黑.ttf"
#endif
18
19
20
21
22
23
24
25
26
27
#define MAX_TEXT_LENGTH 256
SDL_Surface *screen;
#ifdef HAVE_SDL_TTF
TTF_Font *font;
#endif
SDL_Rect textRect, markedRect;
Uint32 lineColor, backColor;
SDL_Color textColor = { 0, 0, 0 };
28
char text[MAX_TEXT_LENGTH], markedText[SDL_TEXTEDITINGEVENT_TEXT_SIZE];
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
int cursor = 0;
size_t utf8_length(unsigned char c)
{
c = (unsigned char)(0xff & c);
if (c < 0x80)
return 1;
else if ((c >> 5) ==0x6)
return 2;
else if ((c >> 4) == 0xe)
return 3;
else if ((c >> 3) == 0x1e)
return 4;
else
return 0;
}
char *utf8_next(char *p)
{
size_t len = utf8_length(*p);
size_t i = 0;
if (!len)
return 0;
for (; i < len; ++i)
{
++p;
if (!*p)
return 0;
}
return p;
}
char *utf8_advance(char *p, size_t distance)
{
size_t i = 0;
for (; i < distance && p; ++i)
{
p = utf8_next(p);
}
return p;
}
71
72
73
74
75
76
77
78
79
void usage()
{
printf("usage: testime [--font fontfile] [--fullscreen]\n");
exit(0);
}
void InitVideo(int argc, char *argv[])
{
80
int width = 640, height = 480;
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
int flags = SDL_HWSURFACE;
const char *fontname = DEFAULT_FONT;
int fullscreen = 0;
for (argc--, argv++; argc > 0; argc--, argv++)
{
if (strcmp(argv[0], "--help") == 0)
usage();
else if (strcmp(argv[0], "--fullscreen") == 0)
fullscreen = 1;
else if (strcmp(argv[0], "--font") == 0)
{
argc--;
argv++;
if (argc > 0)
fontname = argv[0];
else
usage();
}
}
105
SDL_setenv("SDL_VIDEO_WINDOW_POS", "center", 1);
106
107
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
108
fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
109
110
111
112
113
114
115
116
117
118
exit(-1);
}
#ifdef HAVE_SDL_TTF
/* Initialize fonts */
TTF_Init();
font = TTF_OpenFont(fontname, DEFAULT_PTSIZE);
if (! font)
{
119
fprintf(stderr, "Failed to find font: %s\n", TTF_GetError());
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
exit(-1);
}
#endif
printf("Using font: %s\n", fontname);
atexit(SDL_Quit);
if (fullscreen)
{
SDL_DisplayMode mode;
SDL_GetDesktopDisplayMode(&mode);
width = mode.w;
height = mode.h;
fprintf(stderr, "%dx%d\n", width, height);
flags |= SDL_FULLSCREEN;
}
/* Create window */
screen = SDL_SetVideoMode(width, height, 32, flags);
if (screen == NULL)
{
fprintf(stderr, "Unable to set %dx%d video: %s\n",
width, height, SDL_GetError());
exit(-1);
}
}
void CleanupVideo()
{
SDL_StopTextInput();
#ifdef HAVE_SDL_TTF
TTF_CloseFont(font);
TTF_Quit();
#endif
}
void InitInput()
{
backColor = SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF);
lineColor = SDL_MapRGB(screen->format, 0x0, 0x0, 0x0);
/* Prepare a rect for text input */
textRect.x = textRect.y = 100;
textRect.w = screen->w - 2 * textRect.x;
textRect.h = 50;
text[0] = 0;
markedRect = textRect;
169
markedText[0] = 0;
170
171
172
173
174
175
176
177
178
179
180
SDL_StartTextInput();
}
#ifdef HAVE_SDL_TTF
static void RenderText(SDL_Surface *sur,
TTF_Font *font,
const char *text,
int x, int y,
SDL_Color color)
{
181
if (text && *text) {
182
183
SDL_Surface *textSur = TTF_RenderUTF8_Blended(font, text, color);
SDL_Rect dest = { x, y, textSur->w, textSur->h };
185
186
187
SDL_BlitSurface(textSur, NULL, sur, &dest);
SDL_FreeSurface(textSur);
}
188
189
190
191
192
193
194
195
196
197
198
}
#endif
void Redraw()
{
int w = 0, h = textRect.h;
SDL_Rect cursorRect, underlineRect;
SDL_FillRect(screen, &textRect, backColor);
#ifdef HAVE_SDL_TTF
199
if (*text)
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
{
RenderText(screen, font, text, textRect.x, textRect.y, textColor);
TTF_SizeUTF8(font, text, &w, &h);
}
#endif
markedRect.x = textRect.x + w;
markedRect.w = textRect.w - w;
if (markedRect.w < 0)
{
SDL_Flip(screen);
// Stop text input because we cannot hold any more characters
SDL_StopTextInput();
return;
}
215
216
217
218
else
{
SDL_StartTextInput();
}
219
220
221
222
223
224
cursorRect = markedRect;
cursorRect.w = 2;
cursorRect.h = h;
SDL_FillRect(screen, &markedRect, backColor);
225
if (markedText[0])
226
227
{
#ifdef HAVE_SDL_TTF
228
229
230
231
232
233
234
235
236
237
238
239
240
if (cursor)
{
char *p = utf8_advance(markedText, cursor);
char c = 0;
if (!p)
p = &markedText[strlen(markedText)];
c = *p;
*p = 0;
TTF_SizeUTF8(font, markedText, &w, 0);
cursorRect.x += w;
*p = c;
}
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
RenderText(screen, font, markedText, markedRect.x, markedRect.y, textColor);
TTF_SizeUTF8(font, markedText, &w, &h);
#endif
underlineRect = markedRect;
underlineRect.y += (h - 2);
underlineRect.h = 2;
underlineRect.w = w;
SDL_FillRect(screen, &underlineRect, lineColor);
}
SDL_FillRect(screen, &cursorRect, lineColor);
SDL_Flip(screen);
SDL_SetTextInputRect(&markedRect);
}
void
HotKey_ToggleFullScreen(void)
{
SDL_Surface *screen;
screen = SDL_GetVideoSurface();
if (SDL_WM_ToggleFullScreen(screen)) {
printf("Toggled fullscreen mode - now %s\n",
(screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed");
} else {
printf("Unable to toggle fullscreen mode\n");
}
}
int main(int argc, char *argv[])
{
276
277
278
SDL_Event event;
int done = 0;
279
280
281
282
283
284
285
286
287
InitVideo(argc, argv);
InitInput();
Redraw();
while (! done && SDL_WaitEvent(&event))
{
switch (event.type)
{
case SDL_KEYDOWN:
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
switch (event.key.keysym.sym)
{
case SDLK_ESCAPE:
done = 1;
break;
case SDLK_RETURN:
text[0]=0x00;
Redraw();
break;
case SDLK_BACKSPACE:
{
int textlen=SDL_strlen(text);
do {
if (textlen==0)
{
break;
}
if ((text[textlen-1] & 0x80) == 0x00)
{
/* One byte */
text[textlen-1]=0x00;
break;
}
if ((text[textlen-1] & 0xC0) == 0x80)
{
/* Byte from the multibyte sequence */
text[textlen-1]=0x00;
textlen--;
}
if ((text[textlen-1] & 0xC0) == 0xC0)
{
/* First byte of multibyte sequence */
text[textlen-1]=0x00;
break;
}
} while(1);
Redraw();
}
break;
}
if (done)
{
333
334
335
336
break;
}
fprintf(stderr,
337
338
"Keyboard: scancode 0x%08X = %s, keycode 0x%08X = %s\n",
event.key.keysym.scancode,
339
340
341
342
343
SDL_GetScancodeName(event.key.keysym.scancode),
event.key.keysym.sym, SDL_GetKeyName(event.key.keysym.sym));
break;
case SDL_TEXTINPUT:
344
if (SDL_strlen(event.text.text) == 0 || event.text.text[0] == '\n' ||
345
346
347
markedRect.w < 0)
break;
348
fprintf(stderr, "Keyboard: text input \"%s\"\n", event.text.text);
350
if (SDL_strlen(text) + SDL_strlen(event.text.text) < sizeof(text))
351
SDL_strlcat(text, event.text.text, sizeof(text));
352
353
354
355
356
fprintf(stderr, "text inputed: %s\n", text);
// After text inputed, we can clear up markedText because it
// is committed
357
markedText[0] = 0;
358
359
360
361
362
363
364
Redraw();
break;
case SDL_TEXTEDITING:
fprintf(stderr, "text editing \"%s\", selected range (%d, %d)\n",
event.edit.text, event.edit.start, event.edit.length);
365
strcpy(markedText, event.edit.text);
366
cursor = event.edit.start;
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
Redraw();
break;
case SDL_QUIT:
done = 1;
break;
default:
break;
}
}
CleanupVideo();
return 0;
}