src/examples/gengrid_example.c

   1 /**
   2  * Simple Elementary's <b>gengrid widget</b> example, illustrating its
   3  * usage and API.
   4  *
   5  * See stdout/stderr for output. Compile with:
   6  *
   7  * @verbatim
   8  * gcc -g gengrid_example.c -o gengrid_example `pkg-config --cflags --libs elementary`
   9  * @endverbatim
  10  */
  11
  12 #include <Elementary.h>
  13
  14 typedef struct _Example_Item
  15 {
  16    const char *path;
  17 } Example_Item;
  18
  19 static const char *imgs[9] =
  20 {
  21    "panel_01.jpg",
  22    "plant_01.jpg",
  23    "rock_01.jpg",
  24    "rock_02.jpg",
  25    "sky_01.jpg",
  26    "sky_02.jpg",
  27    "sky_03.jpg",
  28    "sky_04.jpg",
  29    "wood_01.jpg",
  30 };
  31
  32 static Elm_Gengrid_Item_Class *gic = NULL;
  33 static Evas_Object *before_bt, *after_bt;
  34
  35 static void
  36 _on_done(void        *data,
  37          Evas_Object *obj,
  38          void        *event_info)
  39 {
  40    elm_exit();
  41 }
  42
  43 /* change layouting mode */
  44 static void
  45 _horizontal_grid(void        *data,
  46                  Evas_Object *obj,
  47                  void        *event_info)
  48 {
  49    Evas_Object *grid = data;
  50
  51    elm_gengrid_horizontal_set(grid, elm_check_state_get(obj));
  52 }
  53
  54 /* "always select" callback */
  55 static void
  56 _always_select_change(void        *data,
  57                       Evas_Object *obj,
  58                       void        *event_info)
  59 {
  60    Evas_Object *grid = data;
  61    Eina_Bool always = elm_check_state_get(obj);
  62
  63    if (always)
  64      elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_ALWAYS);
  65    else
  66      elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_DEFAULT);
  67
  68    fprintf(stdout, "\"Always select\" mode for gengrid items is now %s\n",
  69            always ? "on" : "off");
  70 }
  71
  72 /* "bouncing mode" callback */
  73 static void
  74 _bouncing_change(void        *data,
  75                  Evas_Object *obj,
  76                  void        *event_info)
  77 {
  78    Evas_Object *grid = data;
  79    Eina_Bool bounce = elm_check_state_get(obj);
  80
  81    elm_gengrid_bounce_set(grid, bounce, bounce);
  82
  83    fprintf(stdout, "Bouncing effect for gengrid is now %s\n",
  84            bounce ? "on" : "off");
  85 }
  86
  87 /* multi-selection callback */
  88 static void
  89 _multi_change(void        *data,
  90               Evas_Object *obj,
  91               void        *event_info)
  92 {
  93    Evas_Object *grid = data;
  94    Eina_Bool multi = elm_check_state_get(obj);
  95
  96    elm_gengrid_multi_select_set(grid, multi);
  97
  98    fprintf(stdout, "Multi-selection for gengrid is now %s\n",
  99            multi ? "on" : "off");
 100
 101    elm_object_disabled_set(before_bt, multi);
 102    elm_object_disabled_set(after_bt, multi);
 103
 104    if (!multi)
 105      {
 106         Elm_Object_Item *gg_it;
 107         const Eina_List *selected = elm_gengrid_selected_items_get(grid), *l;
 108         EINA_LIST_FOREACH(selected, l, gg_it)
 109           elm_gengrid_item_selected_set(gg_it, EINA_FALSE);
 110      }
 111 }
 112
 113 /* no selection callback */
 114 static void
 115 _no_sel_change(void        *data,
 116                Evas_Object *obj,
 117                void        *event_info)
 118 {
 119    Evas_Object *grid = data;
 120    Eina_Bool no_sel = elm_check_state_get(obj);
 121
 122    if (no_sel)
 123      elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_NONE);
 124    else
 125      elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_DEFAULT);
 126
 127    fprintf(stdout, "Selection for gengrid items is now %s\n",
 128            no_sel ? "disabled" : "enabled");
 129 }
 130
 131 /* item selection callback */
 132 static void
 133 _grid_sel(void        *data,
 134           Evas_Object *obj,
 135           void        *event_info)
 136 {
 137    unsigned int x, y;
 138    Example_Item *it = elm_object_item_data_get(event_info);
 139
 140    elm_gengrid_item_pos_get(event_info, &x, &y);
 141
 142    fprintf(stdout, "Item [%p], with data [%p], path %s, at position (%d, %d),"
 143                    " has been selected\n", event_info, data, it->path, x, y);
 144 }
 145
 146 /* new item with random path */
 147 static Example_Item *
 148 _item_new(void)
 149 {
 150    Example_Item *it;
 151
 152    it = malloc(sizeof(*it));
 153    it->path = eina_stringshare_add(imgs[rand() % (sizeof(imgs) /
 154                                                   sizeof(imgs[0]))]);
 155    return it;
 156 }
 157
 158 /* "insert before" callback */
 159 static void
 160 _before_bt_clicked(void        *data,
 161                    Evas_Object *obj,
 162                    void        *event_info)
 163 {
 164    Example_Item *it;
 165    Evas_Object *grid = data;
 166    Elm_Object_Item *sel;
 167
 168    sel = elm_gengrid_selected_item_get(grid);
 169    if (!sel)
 170      return;
 171
 172    it = _item_new();
 173    elm_gengrid_item_insert_before(grid, gic, it, sel, _grid_sel, NULL);
 174 }
 175
 176 /* "insert after" callback */
 177 static void
 178 _after_bt_clicked(void        *data,
 179                   Evas_Object *obj,
 180                   void        *event_info)
 181 {
 182    Example_Item *it;
 183    Evas_Object *grid = data;
 184    Elm_Object_Item *sel;
 185
 186    sel = elm_gengrid_selected_item_get(grid);
 187    if (!sel)
 188      return;
 189
 190    it = _item_new();
 191    elm_gengrid_item_insert_after(grid, gic, it, sel, _grid_sel, NULL);
 192 }
 193
 194 /* prepend an item */
 195 static void
 196 _prepend_bt_clicked(void        *data,
 197                     Evas_Object *obj,
 198                     void        *event_info)
 199 {
 200    Example_Item *it;
 201    Evas_Object *grid = data;
 202
 203    it = _item_new();
 204    elm_gengrid_item_prepend(grid, gic, it, _grid_sel, NULL);
 205 }
 206
 207 /* append an item */
 208 static void
 209 _append_bt_clicked(void        *data,
 210                    Evas_Object *obj,
 211                    void        *event_info)
 212 {
 213    Evas_Object *grid = data;
 214    Example_Item *it = _item_new();
 215
 216    elm_gengrid_item_append(grid, gic, it, _grid_sel, NULL);
 217 }
 218
 219 /* delete items */
 220 static void
 221 _clear_cb(void        *data,
 222           Evas_Object *obj,
 223           void        *event_info)
 224 {
 225    elm_gengrid_clear(data);
 226
 227    fprintf(stdout, "Clearing the grid!\n");
 228 }
 229
 230 /* bring in 1st item */
 231 static void
 232 _bring_1st_clicked(void        *data,
 233                    Evas_Object *obj,
 234                    void        *event_info)
 235 {
 236    Elm_Object_Item *gg_it = elm_gengrid_first_item_get(data);
 237
 238    if (!gg_it) return;
 239
 240    elm_gengrid_item_bring_in(gg_it, ELM_GENGRID_ITEM_SCROLLTO_IN);
 241 }
 242
 243 /* show last item */
 244 static void
 245 _show_last_clicked(void        *data,
 246                    Evas_Object *obj,
 247                    void        *event_info)
 248 {
 249    Elm_Object_Item *gg_it = elm_gengrid_last_item_get(data);
 250
 251    if (!gg_it) return;
 252
 253    elm_gengrid_item_show(gg_it, ELM_GENGRID_ITEM_SCROLLTO_IN);
 254 }
 255
 256 /* disable selected item */
 257 static void
 258 _toggle_disabled_cb(void        *data,
 259                     Evas_Object *obj,
 260                     void        *event_info)
 261 {
 262    Elm_Object_Item *gg_it = elm_gengrid_selected_item_get(data);
 263
 264    if (!gg_it) return;
 265
 266    elm_gengrid_item_selected_set(gg_it, EINA_FALSE);
 267    elm_object_item_disabled_set(gg_it, EINA_TRUE);
 268 }
 269
 270 /* change items' size */
 271 static void
 272 _size_changed(void        *data,
 273               Evas_Object *obj,
 274               void        *event_info)
 275 {
 276    Evas_Object *grid = data;
 277    int size = elm_spinner_value_get(obj);
 278
 279    elm_gengrid_item_size_set(grid, size, size);
 280 }
 281
 282 /* item double click callback */
 283 static void
 284 _double_click(void        *data,
 285               Evas_Object *obj,
 286               void        *event_info)
 287 {
 288    fprintf(stdout, "Double click on item with handle %p\n", event_info);
 289 }
 290
 291 /* item long press callback */
 292 static void
 293 _long_pressed(void        *data,
 294               Evas_Object *obj,
 295               void        *event_info)
 296 {
 297    fprintf(stdout, "Long press on item with handle %p\n", event_info);
 298 }
 299
 300
 301 /* label fetching callback */
 302 static char *
 303 _grid_label_get(void        *data,
 304                 Evas_Object *obj,
 305                 const char  *part)
 306 {
 307    const Example_Item *it = data;
 308    char buf[256];
 309
 310    snprintf(buf, sizeof(buf), "Photo %s", it->path);
 311    return strdup(buf);
 312 }
 313
 314 /* icon fetching callback */
 315 static Evas_Object *
 316 _grid_content_get(void        *data,
 317                Evas_Object *obj,
 318                const char  *part)
 319 {
 320    const Example_Item *it = data;
 321
 322    if (!strcmp(part, "elm.swallow.icon"))
 323      {
 324         Evas_Object *icon = elm_bg_add(obj);
 325         char buf[PATH_MAX];
 326
 327         snprintf(buf, sizeof(buf), "%s/images/%s", elm_app_data_dir_get(),
 328                  it->path);
 329
 330         elm_bg_file_set(icon, buf, NULL);
 331         evas_object_size_hint_aspect_set(icon, EVAS_ASPECT_CONTROL_VERTICAL, 1,
 332                                          1);
 333         evas_object_show(icon);
 334         return icon;
 335      }
 336    else if (!strcmp(part, "elm.swallow.end"))
 337      {
 338         Evas_Object *ck;
 339         ck = elm_check_add(obj);
 340         evas_object_propagate_events_set(ck, EINA_FALSE);
 341         evas_object_show(ck);
 342         return ck;
 343      }
 344
 345    return NULL;
 346 }
 347
 348 /* state fetching callback */
 349 static Eina_Bool
 350 _grid_state_get(void        *data,
 351                 Evas_Object *obj,
 352                 const char  *part)
 353 {
 354    return EINA_FALSE;
 355 }
 356
 357 /* deletion callback */
 358 static void
 359 _grid_del(void        *data,
 360           Evas_Object *obj)
 361 {
 362    Example_Item *it = data;
 363
 364    eina_stringshare_del(it->path);
 365    free(it);
 366 }
 367
 368 /* scrolling animation stopped callback */
 369 static void
 370 _grid_scroll_stopped_cb(void        *data,
 371                         Evas_Object *obj,
 372                         void        *event_info)
 373 {
 374   int h_pagenumber = 0, v_pagenumber = 0;
 375   elm_gengrid_current_page_get(obj, &h_pagenumber, &v_pagenumber);
 376   fprintf(stdout, "Grid current horiz page is %d, vert page is %d\n",
 377           h_pagenumber, v_pagenumber);
 378 }
 379
 380 /* items grid horizontal alignment change */
 381 static void
 382 _h_align_change_cb(void        *data,
 383                    Evas_Object *obj,
 384                    void        *event_info)
 385 {
 386    double v_align;
 387    double val = elm_slider_value_get(obj);
 388
 389    elm_gengrid_align_get(data, NULL, &v_align);
 390
 391    fprintf(stdout, "Setting horizontal alignment to %f\n", val);
 392    elm_gengrid_align_set(data, val, v_align);
 393 }
 394
 395 static void
 396 _v_align_change_cb(void        *data,
 397                    Evas_Object *obj,
 398                    void        *event_info)
 399 {
 400    double h_align;
 401    double val = elm_slider_value_get(obj);
 402
 403    elm_gengrid_align_get(data, &h_align, NULL);
 404
 405    fprintf(stdout, "Setting vertical alignment to %f\n", val);
 406    elm_gengrid_align_set(data, h_align, val);
 407 }
 408
 409 /* page relative size change */
 410 static void
 411 _page_change_cb(void        *data,
 412                 Evas_Object *obj,
 413                 void        *event_info)
 414 {
 415    double val = elm_slider_value_get(obj);
 416
 417    elm_gengrid_page_relative_set(data, val, val);
 418
 419    fprintf(stdout, "Setting grid page's relative size to %f\n", val);
 420 }
 421
 422 EAPI_MAIN int
 423 elm_main(int    argc,
 424          char **argv)
 425 {
 426    Evas_Object *win, *bg, *grid, *bx, *hbx_1, *hbx_2, *hbx_3, *bt, *ck, *sl,
 427    *sp;
 428    Eina_Bool bounce;
 429    double h, v;
 430
 431    srand(time(NULL));
 432
 433    elm_app_info_set(elm_main, "elementary", "images");
 434    win = elm_win_add(NULL, "gengrid", ELM_WIN_BASIC);
 435    elm_win_title_set(win, "Generic Grid Example");
 436    evas_object_smart_callback_add(win, "delete,request", _on_done, NULL);
 437
 438    bg = elm_bg_add(win);
 439    evas_object_size_hint_weight_set(bg, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 440    elm_win_resize_object_add(win, bg);
 441    evas_object_show(bg);
 442
 443    bx = elm_box_add(win);
 444    evas_object_size_hint_weight_set(bx, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 445    elm_win_resize_object_add(win, bx);
 446    evas_object_show(bx);
 447
 448    grid = elm_gengrid_add(win);
 449    elm_gengrid_item_size_set(grid, 150, 150);
 450    evas_object_size_hint_weight_set(grid, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 451    elm_box_pack_end(bx, grid);
 452    evas_object_smart_callback_add(grid, "clicked,double", _double_click, NULL);
 453    evas_object_smart_callback_add(grid, "longpressed", _long_pressed, NULL);
 454    evas_object_show(grid);
 455
 456    hbx_1 = elm_box_add(win);
 457    evas_object_size_hint_weight_set(hbx_1, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 458    elm_box_horizontal_set(hbx_1, EINA_TRUE);
 459    elm_box_pack_end(bx, hbx_1);
 460    evas_object_show(hbx_1);
 461
 462    bt = elm_button_add(win);
 463    elm_object_text_set(bt, "Append");
 464    evas_object_smart_callback_add(bt, "clicked", _append_bt_clicked, grid);
 465    elm_box_pack_end(hbx_1, bt);
 466    evas_object_show(bt);
 467
 468    bt = elm_button_add(win);
 469    elm_object_text_set(bt, "Prepend");
 470    evas_object_smart_callback_add(bt, "clicked", _prepend_bt_clicked, grid);
 471    elm_box_pack_end(hbx_1, bt);
 472    evas_object_show(bt);
 473
 474    before_bt = elm_button_add(win);
 475    elm_object_text_set(before_bt, "Insert before");
 476    evas_object_smart_callback_add(before_bt, "clicked", _before_bt_clicked,
 477                                   grid);
 478    elm_box_pack_end(hbx_1, before_bt);
 479    evas_object_show(before_bt);
 480
 481    after_bt = elm_button_add(win);
 482    elm_object_text_set(after_bt, "Insert after");
 483    evas_object_smart_callback_add(after_bt, "clicked", _after_bt_clicked, grid);
 484    elm_box_pack_end(hbx_1, after_bt);
 485    evas_object_show(after_bt);
 486
 487    bt = elm_button_add(win);
 488    elm_object_text_set(bt, "Clear");
 489    evas_object_smart_callback_add(bt, "clicked", _clear_cb, grid);
 490    elm_box_pack_end(hbx_1, bt);
 491    evas_object_show(bt);
 492
 493    bt = elm_button_add(win);
 494    elm_object_text_set(bt, "Bring in 1st");
 495    evas_object_smart_callback_add(bt, "clicked", _bring_1st_clicked, grid);
 496    elm_box_pack_end(hbx_1, bt);
 497    evas_object_show(bt);
 498
 499    bt = elm_button_add(win);
 500    elm_object_text_set(bt, "Show last");
 501    evas_object_smart_callback_add(bt, "clicked", _show_last_clicked, grid);
 502    elm_box_pack_end(hbx_1, bt);
 503    evas_object_show(bt);
 504
 505    sp = elm_spinner_add(win);
 506    elm_spinner_min_max_set(sp, 10, 1024);
 507    elm_spinner_value_set(sp, 150);
 508    elm_spinner_label_format_set(sp, "Item size: %.0f");
 509    evas_object_smart_callback_add(sp, "changed", _size_changed, grid);
 510    evas_object_size_hint_weight_set(sp, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 511    elm_box_pack_end(hbx_1, sp);
 512    evas_object_show(sp);
 513
 514    hbx_2 = elm_box_add(win);
 515    evas_object_size_hint_weight_set(hbx_2, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 516    elm_box_horizontal_set(hbx_2, EINA_TRUE);
 517    elm_box_pack_end(bx, hbx_2);
 518    evas_object_show(hbx_2);
 519
 520    bt = elm_button_add(win);
 521    elm_object_text_set(bt, "Disable item");
 522    evas_object_smart_callback_add(bt, "clicked", _toggle_disabled_cb, grid);
 523    elm_box_pack_end(hbx_2, bt);
 524    evas_object_show(bt);
 525
 526    ck = elm_check_add(win);
 527    elm_object_text_set(ck, "Horizontal mode");
 528    evas_object_smart_callback_add(ck, "changed", _horizontal_grid, grid);
 529    elm_box_pack_end(hbx_2, ck);
 530    evas_object_show(ck);
 531
 532    ck = elm_check_add(win);
 533    elm_object_text_set(ck, "Always select");
 534    evas_object_smart_callback_add(ck, "changed", _always_select_change, grid);
 535    elm_box_pack_end(hbx_2, ck);
 536    evas_object_show(ck);
 537
 538    ck = elm_check_add(win);
 539    elm_gengrid_bounce_get(grid, &bounce, NULL);
 540    elm_object_text_set(ck, "Bouncing");
 541    elm_check_state_set(ck, bounce);
 542    evas_object_smart_callback_add(ck, "changed", _bouncing_change, grid);
 543    elm_box_pack_end(hbx_2, ck);
 544    evas_object_show(ck);
 545
 546    ck = elm_check_add(win);
 547    elm_object_text_set(ck, "Multi-selection");
 548    elm_check_state_set(ck, elm_gengrid_multi_select_get(grid));
 549    evas_object_smart_callback_add(ck, "changed", _multi_change, grid);
 550    elm_box_pack_end(hbx_2, ck);
 551    evas_object_show(ck);
 552
 553    ck = elm_check_add(win);
 554    elm_object_text_set(ck, "No selection");
 555    evas_object_smart_callback_add(ck, "changed", _no_sel_change, grid);
 556    elm_box_pack_end(hbx_2, ck);
 557    evas_object_show(ck);
 558
 559    hbx_3 = elm_box_add(win);
 560    evas_object_size_hint_weight_set(hbx_3, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 561    elm_box_horizontal_set(hbx_3, EINA_TRUE);
 562    elm_box_pack_end(bx, hbx_3);
 563    evas_object_show(hbx_3);
 564
 565    elm_gengrid_align_get(grid, &h, &v);
 566    evas_object_smart_callback_add(grid, "scroll,anim,stop", _grid_scroll_stopped_cb, NULL);
 567
 568    sl = elm_slider_add(win);
 569    elm_object_text_set(sl, "Horiz. alignment");
 570    elm_slider_span_size_set(sl, 100);
 571    evas_object_size_hint_align_set(sl, 0.5, EVAS_HINT_FILL);
 572    evas_object_size_hint_weight_set(sl, 0.0, EVAS_HINT_EXPAND);
 573    elm_slider_indicator_format_set(sl, "%1.1f");
 574    elm_slider_value_set(sl, h);
 575    elm_box_pack_end(hbx_3, sl);
 576    evas_object_show(sl);
 577
 578    evas_object_smart_callback_add(sl, "changed", _h_align_change_cb, grid);
 579
 580    sl = elm_slider_add(win);
 581    elm_object_text_set(sl, "Vert. alignment");
 582    elm_slider_span_size_set(sl, 100);
 583    evas_object_size_hint_align_set(sl, 0.5, EVAS_HINT_FILL);
 584    evas_object_size_hint_weight_set(sl, 0.0, EVAS_HINT_EXPAND);
 585    elm_slider_indicator_format_set(sl, "%1.1f");
 586    elm_slider_value_set(sl, v);
 587    elm_box_pack_end(hbx_3, sl);
 588    evas_object_show(sl);
 589
 590    evas_object_smart_callback_add(sl, "changed", _v_align_change_cb, grid);
 591
 592    elm_gengrid_align_get(grid, &h, &v);
 593
 594    sl = elm_slider_add(win);
 595    elm_object_text_set(sl, "Page rel. size");
 596    elm_slider_span_size_set(sl, 100);
 597    evas_object_size_hint_align_set(sl, 0.5, EVAS_HINT_FILL);
 598    evas_object_size_hint_weight_set(sl, 0.0, EVAS_HINT_EXPAND);
 599    elm_slider_indicator_format_set(sl, "%1.1f");
 600    elm_slider_value_set(sl, h);
 601    elm_box_pack_end(hbx_3, sl);
 602    evas_object_show(sl);
 603
 604    _page_change_cb(grid, sl, NULL);
 605    evas_object_smart_callback_add(sl, "changed", _page_change_cb, grid);
 606
 607    if (!gic)
 608      {
 609         gic = elm_gengrid_item_class_new();
 610         gic->item_style = "default";
 611         gic->func.text_get = _grid_label_get;
 612         gic->func.content_get = _grid_content_get;
 613         gic->func.state_get = _grid_state_get;
 614         gic->func.del = _grid_del;
 615      } // we only create the first time its needed. we dont unref/free
 616
 617    _append_bt_clicked(grid, NULL, NULL);
 618    _append_bt_clicked(grid, NULL, NULL);
 619    _append_bt_clicked(grid, NULL, NULL);
 620
 621    evas_object_resize(win, 600, 600);
 622    evas_object_show(win);
 623
 624    elm_run();
 625    elm_shutdown();
 626
 627    return 0;
 628 }
 629 ELM_MAIN()