summaryrefslogtreecommitdiff
path: root/src/examples/evas/evas-text.c
blob: 68fc106d119d91bd2ab2d3bdbc34425e50c60ca5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
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
276
277
278
279
280
281
282
283
284
285
286
287
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
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
/**
 * Example of text objects in Evas.
 *
 * You'll need at least one engine built for it (excluding the buffer
 * one). See stdout/stderr for output.
 *
 * @verbatim
 * gcc -o evas-text evas-text.c `pkg-config --libs --cflags evas ecore ecore-evas`
 * @endverbatim
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define PACKAGE_EXAMPLES_DIR "."
#endif

#include <Ecore.h>
#include <Ecore_Evas.h>
#include <stdio.h>
#include <errno.h>

#define WIDTH  (320)
#define HEIGHT (240)

#define GREY {190, 190, 190, 255}
#define BLACK {0, 0, 0, 255}
#define WHITE {255, 255, 255, 255}
#define RED   {255, 0, 0, 255}
#define GREEN {0, 255, 0, 255}
#define BLUE  {0, 0, 255, 255}

#define POINTER_CYCLE(_ptr, _array)                             \
  do                                                            \
    {                                                           \
       if ((unsigned int)(((unsigned char *)(_ptr)) - ((unsigned char *)(_array))) >= \
           sizeof(_array))                                      \
         _ptr = _array;                                         \
    }                                                           \
  while(0)

static const char *commands = \
  "commands are:\n"
  "\tt - change text's current style\n"
  "\tz - change text's font size\n"
  "\tf - change text's font family\n"
  "\tb - change text's base color\n"
  "\ts - change text's \'shadow\' color\n"
  "\to - change text's \'outline\' color\n"
  "\tw - change text's \'glow\' color\n"
  "\tg - change text's \'glow 2\' color\n"
  "\th - print help\n";

static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png";

struct color_tuple
{
   int r, g, b, a;
};

struct text_preset_data
{
   const char        **font_ptr;
   const char         *font[3];

   struct color_tuple *text_ptr;
   struct color_tuple  text[6];

   struct color_tuple *shadow_ptr;
   struct color_tuple  shadow[4];

   struct color_tuple *outline_ptr;
   struct color_tuple  outline[4];

   struct color_tuple *glow_ptr;
   struct color_tuple  glow[4];

   struct color_tuple *glow2_ptr;
   struct color_tuple  glow2[4];
};

struct test_data
{
   Ecore_Evas             *ee;
   Evas                   *evas;
   struct text_preset_data t_data;
   Evas_Object            *text, *bg, *border;
};

static struct test_data d = {0};

static void
_on_destroy(Ecore_Evas *ee EINA_UNUSED)
{
   ecore_main_loop_quit();
}

/* Keep the example's window size in sync with the background image's size */
static void
_canvas_resize_cb(Ecore_Evas *ee)
{
   int w, h;

   ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
   evas_object_resize(d.bg, w, h);
}

static const char *
_text_style_type_to_str(Evas_Text_Style_Type mode)
{
   switch (mode)
     {
      case EVAS_TEXT_STYLE_PLAIN:
        return "plain";

      case EVAS_TEXT_STYLE_SHADOW:
        return "shadow";

      case EVAS_TEXT_STYLE_OUTLINE:
        return "outline";

      case EVAS_TEXT_STYLE_SOFT_OUTLINE:
        return "soft outline";

      case EVAS_TEXT_STYLE_GLOW:
        return "glow";

      case EVAS_TEXT_STYLE_OUTLINE_SHADOW:
        return "outline shadow";

      case EVAS_TEXT_STYLE_FAR_SHADOW:
        return "far shadow";

      case EVAS_TEXT_STYLE_OUTLINE_SOFT_SHADOW:
        return "outline soft shadow";

      case EVAS_TEXT_STYLE_SOFT_SHADOW:
        return "soft shadow";

      case EVAS_TEXT_STYLE_FAR_SOFT_SHADOW:
        return "far soft shadow";

      default:
        return "invalid";
     }
}

static void
_on_keydown(void        *data EINA_UNUSED,
            Evas        *evas EINA_UNUSED,
            Evas_Object *o EINA_UNUSED,
            void        *einfo)
{
   Evas_Event_Key_Down *ev = einfo;

   if (strcmp(ev->key, "h") == 0) /* print help */
     {
        printf("%s", commands);
        return;
     }

   if (strcmp(ev->key, "t") == 0) /* change text's current style */
     {
        Evas_Text_Style_Type type = evas_object_text_style_get(d.text);

        type = (type + 1) % 10;

        evas_object_text_style_set(d.text, type);

        printf("Changing text's style to \'%s\'\n",
               _text_style_type_to_str(type));

        return;
     }

   if (strcmp(ev->key, "f") == 0) /* change text's font */
     {
         int sz;

        (d.t_data.font_ptr)++;

        evas_object_text_font_get(d.text, NULL, &sz);

        POINTER_CYCLE(d.t_data.font_ptr, d.t_data.font);

        evas_object_text_font_set(d.text, *d.t_data.font_ptr, sz);

        printf("Changing text's font to %s\n",
               *d.t_data.font_ptr);

        return;
     }

   if (strcmp(ev->key, "b") == 0) /* change text's base color */
     {
        (d.t_data.text_ptr)++;

        POINTER_CYCLE(d.t_data.text_ptr, d.t_data.text);

        evas_object_color_set(
          d.text, d.t_data.text_ptr->r, d.t_data.text_ptr->g,
          d.t_data.text_ptr->b, d.t_data.text_ptr->a);

        printf("Changing base color for text to (%d, %d, %d, %d)\n",
               d.t_data.text_ptr->r, d.t_data.text_ptr->g,
               d.t_data.text_ptr->b, d.t_data.text_ptr->a);

        return;
     }

   if (strcmp(ev->key, "g") == 0) /* change text's glow 2 color */
     {
        (d.t_data.glow2_ptr)++;

        POINTER_CYCLE(d.t_data.glow2_ptr, d.t_data.glow2);

        evas_object_text_glow2_color_set(
          d.text, d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
          d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);

        printf("Changing glow 2 color for text to (%d, %d, %d, %d)\n",
               d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
               d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);

        return;
     }

   if (strcmp(ev->key, "w") == 0) /* change text's glow color */
     {
        (d.t_data.glow_ptr)++;

        POINTER_CYCLE(d.t_data.glow_ptr, d.t_data.glow);

        evas_object_text_glow_color_set(
          d.text, d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
          d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);

        printf("Changing glow color for text to (%d, %d, %d, %d)\n",
               d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
               d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);

        return;
     }

   if (strcmp(ev->key, "o") == 0) /* change text's outline color */
     {
        (d.t_data.outline_ptr)++;

        POINTER_CYCLE(d.t_data.outline_ptr, d.t_data.outline);

        evas_object_text_outline_color_set(
          d.text, d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
          d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);

        printf("Changing outline color for text to (%d, %d, %d, %d)\n",
               d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
               d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);

        return;
     }

   if (strcmp(ev->key, "s") == 0) /* change text's shadow color */
     {
        (d.t_data.shadow_ptr)++;

        POINTER_CYCLE(d.t_data.shadow_ptr, d.t_data.shadow);

        evas_object_text_shadow_color_set(
          d.text, d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
          d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);

        printf("Changing shadow color for text to (%d, %d, %d, %d)\n",
               d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
               d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);

        return;
     }

   if (strcmp(ev->key, "z") == 0) /* change text's font size */
     {
        const char *font;
        int size;

        evas_object_text_font_get(d.text, &font, &size);

        size = (size + 10) % 50;
        if (!size) size = 10;

        evas_object_text_font_set(d.text, font, size);

        printf("Changing text's font size to %d\n", size);

        return;
     }
}

int
main(void)
{
   int size;
   const char *font;

   if (!ecore_evas_init())
     return EXIT_FAILURE;

   /* init values one is going to cycle through while running this
    * example */
   struct text_preset_data init_data =
   {
      .font = {"DejaVu", "Courier", "Utopia"},
      .text = {BLACK, WHITE, GREY, RED, GREEN, BLUE},
      .shadow = {WHITE, BLUE, GREEN, RED},
      .outline = {WHITE, RED, GREEN, BLUE},
      .glow = {WHITE, BLUE, GREEN, RED},
      .glow2 = {WHITE, RED, BLUE, GREEN}
   };

   d.t_data = init_data;
   d.t_data.font_ptr = d.t_data.font;
   d.t_data.text_ptr = d.t_data.text;
   d.t_data.glow_ptr = d.t_data.glow;
   d.t_data.glow2_ptr = d.t_data.glow2;
   d.t_data.outline_ptr = d.t_data.outline;
   d.t_data.shadow_ptr = d.t_data.shadow;

   /* this will give you a window with an Evas canvas under the first
    * engine available */
   d.ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
   if (!d.ee)
     goto error;

   ecore_evas_callback_destroy_set(d.ee, _on_destroy);
   ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
   ecore_evas_show(d.ee);

   /* the canvas pointer, de facto */
   d.evas = ecore_evas_get(d.ee);

   d.bg = evas_object_rectangle_add(d.evas);
   evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
   evas_object_move(d.bg, 0, 0); /* at canvas' origin */
   evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
   evas_object_show(d.bg);

   evas_object_focus_set(d.bg, EINA_TRUE);
   evas_object_event_callback_add(
     d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);

   d.text = evas_object_text_add(d.evas);
   evas_object_text_style_set(d.text, EVAS_TEXT_STYLE_PLAIN);

   /* let the pre-set things be enforced */
   evas_object_color_set(
     d.text, d.t_data.text_ptr->r, d.t_data.text_ptr->g,
     d.t_data.text_ptr->b, d.t_data.text_ptr->a);

   evas_object_text_glow_color_set(
     d.text, d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
     d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);

   evas_object_text_glow2_color_set(
     d.text, d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
     d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);

   evas_object_text_outline_color_set(
     d.text, d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
     d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);

   evas_object_text_shadow_color_set(
     d.text, d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
     d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);

   evas_object_text_font_set(d.text, *d.t_data.font_ptr, 30);
   evas_object_text_text_set(d.text, "sample text");

   evas_object_resize(d.text, (3 * WIDTH) / 4, HEIGHT / 4);
   evas_object_move(d.text, WIDTH / 8, (3 * HEIGHT) / 8);
   evas_object_show(d.text);

   evas_object_text_font_get(d.text, &font, &size);
   printf("Adding text object with font %s, size %d\n", font, size);

   /* this is a border around the text object above, here just to
    * emphasize its geometry */
   d.border = evas_object_image_filled_add(d.evas);
   evas_object_image_file_set(d.border, border_img_path, NULL);
   evas_object_image_border_set(d.border, 3, 3, 3, 3);
   evas_object_image_border_center_fill_set(d.border, EVAS_BORDER_FILL_NONE);

   evas_object_resize(d.border, ((3 * WIDTH) / 4) + 3, (HEIGHT / 4) + 3);
   evas_object_move(d.border, (WIDTH / 8) - 3, ((3 * HEIGHT) / 8) - 3);
   evas_object_show(d.border);

   printf("%s", commands);
   ecore_main_loop_begin();

   ecore_evas_free(d.ee);
   ecore_evas_shutdown();
   return 0;

error:
   fprintf(stderr, "error: Requires at least one Evas engine built and linked"
                   " to ecore-evas for this example to run properly.\n");
   ecore_evas_shutdown();
   return -1;
}