src/bin/e_widget.c

   1 #include "e.h"
   2
   3 #define SMART_NAME     "e_widget"
   4 #define API_ENTRY      E_Smart_Data * sd; sd = evas_object_smart_data_get(obj); if ((!obj) || (!sd) || (evas_object_type_get(obj) && strcmp(evas_object_type_get(obj), SMART_NAME)))
   5 #define INTERNAL_ENTRY E_Smart_Data * sd; sd = evas_object_smart_data_get(obj); if (!sd) return;
   6 typedef struct _E_Smart_Data E_Smart_Data;
   7
   8 struct _E_Smart_Data
   9 {
  10    Evas_Object  *parent_obj;
  11    Evas_Coord    x, y, w, h, minw, minh;
  12    Eina_List    *subobjs;
  13    Evas_Object  *resize_obj;
  14    void          (*del_func)(Evas_Object *obj);
  15    void          (*focus_func)(Evas_Object *obj);
  16    void          (*activate_func)(Evas_Object *obj);
  17    void          (*disable_func)(Evas_Object *obj);
  18    void          (*on_focus_func)(void *data, Evas_Object *obj);
  19    void         *on_focus_data;
  20    void          (*on_change_func)(void *data, Evas_Object *obj);
  21    void         *on_change_data;
  22    void         *data;
  23    unsigned char can_focus : 1;
  24    unsigned char child_can_focus : 1;
  25    unsigned char focused : 1;
  26    unsigned char disabled : 1;
  27 };
  28
  29 /* local subsystem functions */
  30 static void _e_smart_reconfigure(E_Smart_Data *sd);
  31 static void _e_smart_add(Evas_Object *obj);
  32 static void _e_smart_del(Evas_Object *obj);
  33 static void _e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y);
  34 static void _e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h);
  35 static void _e_smart_show(Evas_Object *obj);
  36 static void _e_smart_hide(Evas_Object *obj);
  37 static void _e_smart_color_set(Evas_Object *obj, int r, int g, int b, int a);
  38 static void _e_smart_clip_set(Evas_Object *obj, Evas_Object *clip);
  39 static void _e_smart_clip_unset(Evas_Object *obj);
  40 static void _e_smart_init(void);
  41
  42 /* local subsystem globals */
  43 static Evas_Smart *_e_smart = NULL;
  44
  45 /* externally accessible functions */
  46 EAPI Evas_Object *
  47 e_widget_add(Evas *evas)
  48 {
  49    _e_smart_init();
  50    return evas_object_smart_add(evas, _e_smart);
  51 }
  52
  53 EAPI void
  54 e_widget_del_hook_set(Evas_Object *obj, void (*func)(Evas_Object *obj))
  55 {
  56    API_ENTRY return;
  57    sd->del_func = func;
  58 }
  59
  60 EAPI void
  61 e_widget_focus_hook_set(Evas_Object *obj, void (*func)(Evas_Object *obj))
  62 {
  63    API_ENTRY return;
  64    sd->focus_func = func;
  65 }
  66
  67 EAPI void
  68 e_widget_activate_hook_set(Evas_Object *obj, void (*func)(Evas_Object *obj))
  69 {
  70    API_ENTRY return;
  71    sd->activate_func = func;
  72 }
  73
  74 EAPI void
  75 e_widget_disable_hook_set(Evas_Object *obj, void (*func)(Evas_Object *obj))
  76 {
  77    API_ENTRY return;
  78    sd->disable_func = func;
  79 }
  80
  81 EAPI void
  82 e_widget_on_focus_hook_set(Evas_Object *obj, void (*func)(void *data, Evas_Object *obj), void *data)
  83 {
  84    API_ENTRY return;
  85    sd->on_focus_func = func;
  86    sd->on_focus_data = data;
  87 }
  88
  89 EAPI void
  90 e_widget_on_change_hook_set(Evas_Object *obj, void (*func)(void *data, Evas_Object *obj), void *data)
  91 {
  92    API_ENTRY return;
  93    sd->on_change_func = func;
  94    sd->on_change_data = data;
  95 }
  96
  97 EAPI void
  98 e_widget_data_set(Evas_Object *obj, void *data)
  99 {
 100    API_ENTRY return;
 101    sd->data = data;
 102 }
 103
 104 EAPI void *
 105 e_widget_data_get(Evas_Object *obj)
 106 {
 107    API_ENTRY return NULL;
 108    return sd->data;
 109 }
 110
 111 EAPI void
 112 e_widget_size_min_set(Evas_Object *obj, Evas_Coord minw, Evas_Coord minh)
 113 {
 114    API_ENTRY return;
 115    if (minw >= 0) sd->minw = minw;
 116    if (minh >= 0) sd->minh = minh;
 117 }
 118
 119 EAPI void
 120 e_widget_size_min_get(Evas_Object *obj, Evas_Coord *minw, Evas_Coord *minh)
 121 {
 122    API_ENTRY return;
 123    if (minw) *minw = sd->minw;
 124    if (minh) *minh = sd->minh;
 125 }
 126
 127 static void
 128 _sub_obj_del(void *data,
 129              Evas *e __UNUSED__,
 130              Evas_Object *obj,
 131              void *event_info __UNUSED__)
 132 {
 133    E_Smart_Data *sd = data;
 134
 135    sd->subobjs = eina_list_remove(sd->subobjs, obj);
 136    evas_object_event_callback_del(obj, EVAS_CALLBACK_DEL, _sub_obj_del);
 137 }
 138
 139 EAPI void
 140 e_widget_sub_object_add(Evas_Object *obj, Evas_Object *sobj)
 141 {
 142    API_ENTRY return;
 143
 144    if (eina_list_data_find(sd->subobjs, sobj)) return;
 145
 146    sd->subobjs = eina_list_append(sd->subobjs, sobj);
 147    evas_object_event_callback_add(sobj, EVAS_CALLBACK_DEL, _sub_obj_del, sd);
 148    if (!sd->child_can_focus)
 149      {
 150         if (e_widget_can_focus_get(sobj)) sd->child_can_focus = 1;
 151      }
 152    if (strcmp(evas_object_type_get(sobj), SMART_NAME)) return;
 153
 154    sd = evas_object_smart_data_get(sobj);
 155    if (sd)
 156      {
 157         if (sd->parent_obj) e_widget_sub_object_del(sd->parent_obj, sobj);
 158         sd->parent_obj = obj;
 159      }
 160    evas_object_event_callback_del_full(sobj, EVAS_CALLBACK_DEL, _sub_obj_del, sd);
 161 }
 162
 163 EAPI void
 164 e_widget_sub_object_del(Evas_Object *obj, Evas_Object *sobj)
 165 {
 166    API_ENTRY return;
 167    evas_object_event_callback_del(sobj, EVAS_CALLBACK_DEL, _sub_obj_del);
 168    sd->subobjs = eina_list_remove(sd->subobjs, sobj);
 169    if (!sd->child_can_focus)
 170      {
 171         if (e_widget_can_focus_get(sobj)) sd->child_can_focus = 0;
 172      }
 173 }
 174
 175 EAPI void
 176 e_widget_resize_object_set(Evas_Object *obj, Evas_Object *sobj)
 177 {
 178    API_ENTRY return;
 179    if (sd->resize_obj) evas_object_smart_member_del(sd->resize_obj);
 180    sd->resize_obj = sobj;
 181    evas_object_smart_member_add(sobj, obj);
 182    _e_smart_reconfigure(sd);
 183 }
 184
 185 EAPI void
 186 e_widget_can_focus_set(Evas_Object *obj, int can_focus)
 187 {
 188    API_ENTRY return;
 189    sd->can_focus = can_focus;
 190 }
 191
 192 EAPI int
 193 e_widget_can_focus_get(Evas_Object *obj)
 194 {
 195    API_ENTRY return 0;
 196    if (sd->disabled) return 0;
 197    if (sd->can_focus) return 1;
 198    if (sd->child_can_focus) return 1;
 199    return 0;
 200 }
 201
 202 EAPI int
 203 e_widget_focus_get(Evas_Object *obj)
 204 {
 205    API_ENTRY return 0;
 206    return sd->focused;
 207 }
 208
 209 EAPI Evas_Object *
 210 e_widget_focused_object_get(Evas_Object *obj)
 211 {
 212    Eina_List *l = NULL;
 213    Evas_Object *sobj = NULL;
 214
 215    API_ENTRY return NULL;
 216    if (!sd->focused) return NULL;
 217    EINA_LIST_FOREACH(sd->subobjs, l, sobj)
 218      {
 219         sobj = e_widget_focused_object_get(sobj);
 220         if (sobj) return sobj;
 221      }
 222    return obj;
 223 }
 224
 225 EAPI int
 226 e_widget_focus_jump(Evas_Object *obj, int forward)
 227 {
 228    API_ENTRY return 0;
 229    if (!e_widget_can_focus_get(obj)) return 0;
 230
 231    /* if it has a focus func its an end-point widget like a button */
 232    if (sd->focus_func)
 233      {
 234         if (!sd->focused) sd->focused = 1;
 235         else sd->focused = 0;
 236         sd->focus_func(obj);
 237         if (sd->on_focus_func) sd->on_focus_func(sd->on_focus_data, obj);
 238         return sd->focused;
 239      }
 240    /* its some container */
 241    else
 242      {
 243         Eina_List *l = NULL;
 244         Evas_Object *sobj = NULL;
 245         int focus_next = 0;
 246
 247         if (!sd->focused)
 248           {
 249              e_widget_focus_set(obj, forward);
 250              sd->focused = 1;
 251              if (sd->on_focus_func) sd->on_focus_func(sd->on_focus_data, obj);
 252              return 1;
 253           }
 254         else
 255           {
 256              if (forward)
 257                {
 258                   EINA_LIST_FOREACH(sd->subobjs, l, sobj)
 259                     {
 260                        if (!e_widget_can_focus_get(sobj)) continue;
 261                        if ((focus_next) && (!e_widget_disabled_get(sobj)))
 262                          {
 263                             /* the previous focused item was unfocused - so focus
 264                              * the next one (that can be focused) */
 265                             if (e_widget_focus_jump(sobj, forward))
 266                               return 1;
 267                             break;
 268                          }
 269                        else
 270                          {
 271                             if (e_widget_focus_get(sobj))
 272                               {
 273                                  /* jump to the next focused item or focus this item */
 274                                  if (e_widget_focus_jump(sobj, forward))
 275                                    return 1;
 276                                  /* it returned 0 - it got to the last item and is past it */
 277                                  focus_next = 1;
 278                               }
 279                          }
 280                     }
 281                }
 282              else
 283                {
 284                   EINA_LIST_REVERSE_FOREACH(sd->subobjs, l, sobj)
 285                     {
 286                        if (e_widget_can_focus_get(sobj))
 287                          {
 288                             if ((focus_next) &&
 289                                 (!e_widget_disabled_get(sobj)))
 290                               {
 291                                  /* the previous focused item was unfocused - so focus
 292                                   * the next one (that can be focused) */
 293                                  if (e_widget_focus_jump(sobj, forward))
 294                                    return 1;
 295                                  else break;
 296                               }
 297                             else
 298                               {
 299                                  if (e_widget_focus_get(sobj))
 300                                    {
 301                                       /* jump to the next focused item or focus this item */
 302                                       if (e_widget_focus_jump(sobj, forward))
 303                                         return 1;
 304                                       /* it returned 0 - it got to the last item and is past it */
 305                                       focus_next = 1;
 306                                    }
 307                               }
 308                          }
 309                     }
 310                }
 311           }
 312      }
 313    /* no next item can be focused */
 314    sd->focused = 0;
 315    return 0;
 316 }
 317
 318 EAPI void
 319 e_widget_focus_set(Evas_Object *obj, int first)
 320 {
 321    API_ENTRY return;
 322    if (!sd->focused)
 323      {
 324         sd->focused = 1;
 325         if (sd->on_focus_func) sd->on_focus_func(sd->on_focus_data, obj);
 326      }
 327    if (sd->focus_func)
 328      {
 329         sd->focus_func(obj);
 330         return;
 331      }
 332    else
 333      {
 334         Eina_List *l = NULL;
 335         Evas_Object *sobj;
 336
 337         if (first)
 338           {
 339              EINA_LIST_FOREACH(sd->subobjs, l, sobj)
 340                {
 341                   if ((e_widget_can_focus_get(sobj)) &&
 342                       (!e_widget_disabled_get(sobj)))
 343                     {
 344                        e_widget_focus_set(sobj, first);
 345                        break;
 346                     }
 347                }
 348           }
 349         else
 350           {
 351              EINA_LIST_REVERSE_FOREACH(sd->subobjs, l, sobj)
 352                {
 353                   if ((e_widget_can_focus_get(sobj)) &&
 354                       (!e_widget_disabled_get(sobj)))
 355                     {
 356                        e_widget_focus_set(sobj, first);
 357                        break;
 358                     }
 359                }
 360           }
 361      }
 362 }
 363
 364 EAPI Evas_Object *
 365 e_widget_parent_get(Evas_Object *obj)
 366 {
 367    API_ENTRY return NULL;
 368    return sd->parent_obj;
 369 }
 370
 371 EAPI void
 372 e_widget_focused_object_clear(Evas_Object *obj)
 373 {
 374    Eina_List *l = NULL;
 375    Evas_Object *sobj = NULL;
 376
 377    API_ENTRY return;
 378    if (!sd->focused) return;
 379    sd->focused = 0;
 380    EINA_LIST_FOREACH(sd->subobjs, l, sobj)
 381      {
 382         if (e_widget_focus_get(sobj))
 383           {
 384              e_widget_focused_object_clear(sobj);
 385              break;
 386           }
 387      }
 388    if (sd->focus_func) sd->focus_func(obj);
 389 }
 390
 391 EAPI void
 392 e_widget_focus_steal(Evas_Object *obj)
 393 {
 394    Evas_Object *parent = NULL, *o = NULL;
 395
 396    API_ENTRY return;
 397    if ((sd->focused) || (sd->disabled) || (!sd->can_focus)) return;
 398    parent = obj;
 399    for (;; )
 400      {
 401         o = e_widget_parent_get(parent);
 402         if (!o) break;
 403         parent = o;
 404      }
 405    e_widget_focused_object_clear(parent);
 406    parent = obj;
 407    for (;; )
 408      {
 409         sd = evas_object_smart_data_get(parent);
 410         sd->focused = 1;
 411         if (sd->on_focus_func) sd->on_focus_func(sd->on_focus_data, parent);
 412         o = e_widget_parent_get(parent);
 413         if (!o) break;
 414         parent = o;
 415      }
 416    sd = evas_object_smart_data_get(obj);
 417    if (sd->focus_func) sd->focus_func(obj);
 418 }
 419
 420 EAPI void
 421 e_widget_activate(Evas_Object *obj)
 422 {
 423    API_ENTRY return;
 424    e_widget_change(obj);
 425    if (sd->activate_func) sd->activate_func(obj);
 426 }
 427
 428 EAPI void
 429 e_widget_change(Evas_Object *obj)
 430 {
 431    API_ENTRY return;
 432    if (sd->parent_obj) e_widget_change(sd->parent_obj);
 433    if (sd->on_change_func) sd->on_change_func(sd->on_change_data, obj);
 434 }
 435
 436 EAPI void
 437 e_widget_disabled_set(Evas_Object *obj, int disabled)
 438 {
 439    API_ENTRY return;
 440    if (sd->disabled == disabled) return;
 441    sd->disabled = disabled;
 442    if (sd->focused)
 443      {
 444         Evas_Object *o = NULL, *parent = NULL;
 445
 446         parent = obj;
 447         for (;; )
 448           {
 449              o = e_widget_parent_get(parent);
 450              if (!o) break;
 451              parent = o;
 452           }
 453         e_widget_focus_jump(parent, 1);
 454      }
 455    if (sd->disable_func) sd->disable_func(obj);
 456 }
 457
 458 EAPI int
 459 e_widget_disabled_get(Evas_Object *obj)
 460 {
 461    API_ENTRY return 0;
 462    return sd->disabled;
 463 }
 464
 465 EAPI E_Pointer *
 466 e_widget_pointer_get(Evas_Object *obj)
 467 {
 468    E_Win *win = NULL;
 469
 470    API_ENTRY return NULL;
 471    win = e_win_evas_object_win_get(obj);
 472    if (win) return win->pointer;
 473    return NULL;
 474 }
 475
 476 EAPI void
 477 e_widget_size_min_resize(Evas_Object *obj)
 478 {
 479    API_ENTRY return;
 480    evas_object_resize(obj, sd->minw, sd->minh);
 481 }
 482
 483 /* local subsystem functions */
 484 static void
 485 _e_smart_reconfigure(E_Smart_Data *sd)
 486 {
 487    if (sd->resize_obj)
 488      {
 489         evas_object_move(sd->resize_obj, sd->x, sd->y);
 490         evas_object_resize(sd->resize_obj, sd->w, sd->h);
 491      }
 492 }
 493
 494 static void
 495 _e_smart_add(Evas_Object *obj)
 496 {
 497    E_Smart_Data *sd = NULL;
 498
 499    sd = calloc(1, sizeof(E_Smart_Data));
 500    if (!sd) return;
 501    sd->x = 0;
 502    sd->y = 0;
 503    sd->w = 0;
 504    sd->h = 0;
 505    sd->can_focus = 1;
 506    evas_object_smart_data_set(obj, sd);
 507 }
 508
 509 static void
 510 _e_smart_del(Evas_Object *obj)
 511 {
 512    INTERNAL_ENTRY;
 513
 514    if (sd->del_func) sd->del_func(obj);
 515    while (sd->subobjs)
 516      {
 517         Evas_Object *sobj = sd->subobjs->data;
 518         /* DO NOT MACRO THIS!
 519          * list gets reshuffled during object delete callback chain
 520          * and breaks the world.
 521          * BORKER CERTIFICATION: GOLD
 522          * -discomfitor, 7/4/2012
 523          */
 524         sd->subobjs = eina_list_remove_list(sd->subobjs, sd->subobjs);
 525         evas_object_del(sobj);
 526      }
 527    free(sd);
 528 }
 529
 530 static void
 531 _e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
 532 {
 533    INTERNAL_ENTRY;
 534    sd->x = x;
 535    sd->y = y;
 536    _e_smart_reconfigure(sd);
 537 }
 538
 539 static void
 540 _e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
 541 {
 542    INTERNAL_ENTRY;
 543    sd->w = w;
 544    sd->h = h;
 545    _e_smart_reconfigure(sd);
 546 }
 547
 548 static void
 549 _e_smart_show(Evas_Object *obj)
 550 {
 551    INTERNAL_ENTRY;
 552    if (sd->resize_obj)
 553      evas_object_show(sd->resize_obj);
 554 }
 555
 556 static void
 557 _e_smart_hide(Evas_Object *obj)
 558 {
 559    INTERNAL_ENTRY;
 560    if (sd->resize_obj)
 561      evas_object_hide(sd->resize_obj);
 562 }
 563
 564 static void
 565 _e_smart_color_set(Evas_Object *obj, int r, int g, int b, int a)
 566 {
 567    INTERNAL_ENTRY;
 568    if (sd->resize_obj)
 569      evas_object_color_set(sd->resize_obj, r, g, b, a);
 570 }
 571
 572 static void
 573 _e_smart_clip_set(Evas_Object *obj, Evas_Object *clip)
 574 {
 575    INTERNAL_ENTRY;
 576    if (sd->resize_obj)
 577      evas_object_clip_set(sd->resize_obj, clip);
 578 }
 579
 580 static void
 581 _e_smart_clip_unset(Evas_Object *obj)
 582 {
 583    INTERNAL_ENTRY;
 584    if (sd->resize_obj)
 585      evas_object_clip_unset(sd->resize_obj);
 586 }
 587
 588 /* never need to touch this */
 589
 590 static void
 591 _e_smart_init(void)
 592 {
 593    if (_e_smart) return;
 594    {
 595       static const Evas_Smart_Class sc =
 596       {
 597          SMART_NAME,
 598          EVAS_SMART_CLASS_VERSION,
 599          _e_smart_add,
 600          _e_smart_del,
 601          _e_smart_move,
 602          _e_smart_resize,
 603          _e_smart_show,
 604          _e_smart_hide,
 605          _e_smart_color_set,
 606          _e_smart_clip_set,
 607          _e_smart_clip_unset,
 608          NULL,
 609          NULL,
 610          NULL,
 611          NULL,
 612          NULL,
 613          NULL,
 614          NULL
 615       };
 616       _e_smart = evas_smart_class_new(&sc);
 617    }
 618 }
 619