src/lib/elc_naviframe.c

   1 #include <Elementary.h>
   2 #include "elm_priv.h"
   3
   4 typedef struct _Widget_Data Widget_Data;
   5 typedef struct _Elm_Naviframe_Item Elm_Naviframe_Item;
   6 typedef struct _Elm_Naviframe_Content_Item_Pair Elm_Naviframe_Content_Item_Pair;
   7 typedef struct _Elm_Naviframe_Text_Item_Pair Elm_Naviframe_Text_Item_Pair;
   8
   9 struct _Widget_Data
  10 {
  11    Eina_List    *stack;
  12    Evas_Object  *base;
  13    Eina_Bool     preserve: 1;
  14    Eina_Bool     pass_events: 1;
  15 };
  16
  17 struct _Elm_Naviframe_Content_Item_Pair
  18 {
  19    const char *part;
  20    Evas_Object *content;
  21    Elm_Naviframe_Item *it;
  22 };
  23
  24 struct _Elm_Naviframe_Text_Item_Pair
  25 {
  26    const char *part;
  27    const char *text;
  28 };
  29
  30 struct _Elm_Naviframe_Item
  31 {
  32    Elm_Widget_Item    base;
  33    Eina_List         *content_list;
  34    Eina_List         *text_list;
  35    Evas_Object       *content;
  36    Evas_Object       *title_prev_btn;
  37    Evas_Object       *title_next_btn;
  38    const char        *style;
  39    Eina_Bool          back_btn: 1;
  40    Eina_Bool          title_visible: 1;
  41 };
  42
  43 static const char *widtype = NULL;
  44
  45 static const char SIG_TRANSITION_FINISHED[] = "transition,finished";
  46 static const char SIG_TITLE_CLICKED[] = "title,clicked";
  47
  48 static const Evas_Smart_Cb_Description _signals[] = {
  49        {SIG_TRANSITION_FINISHED, ""},
  50        {SIG_TITLE_CLICKED, ""},
  51        {NULL, NULL}
  52 };
  53
  54 static void _del_hook(Evas_Object *obj);
  55 static void _theme_hook(Evas_Object *obj);
  56 static void _disable_hook(Evas_Object *obj);
  57 static void _text_set_hook(Elm_Object_Item *it,
  58                            const char *part,
  59                            const char *label);
  60 static const char *_text_get_hook(const Elm_Object_Item *it,
  61                                    const char *part);
  62 static void _content_set_hook(Elm_Object_Item *it,
  63                               const char *part,
  64                               Evas_Object *content);
  65 static Evas_Object *_content_get_hook(const Elm_Object_Item *it,
  66                                       const char *part);
  67 static Evas_Object *_content_unset_hook(Elm_Object_Item *it,
  68                                         const char *part);
  69 static void _sizing_eval(Evas_Object *obj);
  70 static void _item_sizing_eval(Elm_Naviframe_Item *it);
  71 static void _move(void *data, Evas *e, Evas_Object *obj, void *event_info);
  72 static void _resize(void *data,
  73                     Evas *e,
  74                     Evas_Object *obj,
  75                     void *event_info);
  76 static void _title_clicked(void *data, Evas_Object *obj,
  77                            const char *emission,
  78                            const char *source);
  79 static void _back_btn_clicked(void *data,
  80                               Evas_Object *obj,
  81                               void *event_info);
  82 static Evas_Object *_back_btn_new(Evas_Object *obj);
  83 static void _item_content_del(void *data,
  84                               Evas *e,
  85                               Evas_Object *obj,
  86                               void *event_info);
  87 static void _title_content_del(void *data,
  88                                Evas *e,
  89                                Evas_Object *obj,
  90                                void *event_info);
  91 static void _title_prev_btn_del(void *data,
  92                                 Evas *e,
  93                                 Evas_Object *obj,
  94                                 void *event_info);
  95 static void _title_next_btn_del(void *data,
  96                                 Evas *e,
  97                                 Evas_Object *obj,
  98                                 void *event_info);
  99 static void _title_content_set(Elm_Naviframe_Item *it,
 100                                Elm_Naviframe_Content_Item_Pair *pair,
 101                                const char *part,
 102                                Evas_Object *content);
 103 static void _title_prev_btn_set(Elm_Naviframe_Item *it,
 104                                 Evas_Object *btn,
 105                                 Eina_Bool back_btn);
 106 static void _title_next_btn_set(Elm_Naviframe_Item *it, Evas_Object *btn);
 107 static void _item_del(Elm_Naviframe_Item *it);
 108 static void _pushed_finished(void *data,
 109                              Evas_Object *obj,
 110                              const char *emission,
 111                              const char *source);
 112 static void _popped_finished(void *data,
 113                              Evas_Object *obj,
 114                              const char *emission,
 115                              const char *source);
 116 static void _show_finished(void *data,
 117                            Evas_Object *obj,
 118                            const char *emission,
 119                            const char *source);
 120 static void _item_content_set(Elm_Naviframe_Item *navi_it,
 121                               Evas_Object *content);
 122
 123 static void
 124 _del_hook(Evas_Object *obj)
 125 {
 126    Widget_Data *wd;
 127    Eina_List *list;
 128    Elm_Naviframe_Item *it;
 129
 130    wd = elm_widget_data_get(obj);
 131    if (!wd) return;
 132
 133    EINA_LIST_FOREACH(wd->stack, list, it)
 134      _item_del(it);
 135    eina_list_free(wd->stack);
 136    free(wd);
 137 }
 138
 139 static void
 140 _theme_hook(Evas_Object *obj __UNUSED__)
 141 {
 142    //FIXME:
 143 }
 144
 145 static void
 146 _disable_hook(Evas_Object *obj __UNUSED__)
 147 {
 148    //FIXME:
 149 }
 150
 151 static void
 152 _text_set_hook(Elm_Object_Item *it, const char *part, const char *label)
 153 {
 154    ELM_OBJ_ITEM_CHECK_OR_RETURN(it);
 155
 156    Eina_List *l = NULL;
 157    Elm_Naviframe_Text_Item_Pair *pair = NULL;
 158    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 159    char buf[1024];
 160
 161    if (!part) return;
 162
 163    EINA_LIST_FOREACH(navi_it->text_list, l, pair)
 164      {
 165         if (!strcmp(part, pair->part))
 166           {
 167              if (pair->text)
 168                {
 169                   if (!strcmp(pair->text, label))
 170                     return;
 171                }
 172              break;
 173           }
 174      }
 175
 176    if (!pair)
 177      {
 178         pair = ELM_NEW(Elm_Naviframe_Text_Item_Pair);
 179         if (!pair)
 180           {
 181              ERR("Failed to allocate new text part of the item! : naviframe=%p", navi_it->base.widget);
 182              return;
 183           }
 184         eina_stringshare_replace(&pair->part, part);
 185         navi_it->text_list = eina_list_append(navi_it->text_list, pair);
 186      }
 187
 188    eina_stringshare_replace(&pair->text, label);
 189    edje_object_part_text_set(navi_it->base.view, part, label);
 190
 191    snprintf(buf, sizeof(buf), "elm,state,%s,show", part);
 192
 193    if (label)
 194      edje_object_signal_emit(navi_it->base.view, buf, "elm");
 195    else
 196      edje_object_signal_emit(navi_it->base.view, buf, "elm");
 197
 198    _item_sizing_eval(navi_it);
 199 }
 200
 201 static const char *
 202 _text_get_hook(const Elm_Object_Item *it, const char *part)
 203 {
 204    ELM_OBJ_ITEM_CHECK_OR_RETURN(it, NULL);
 205    Eina_List *l = NULL;
 206    Elm_Naviframe_Text_Item_Pair *pair = NULL;
 207    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 208
 209    if (!part) return NULL;
 210
 211    EINA_LIST_FOREACH(navi_it->text_list, l, pair)
 212      {
 213         if (!strcmp(part, pair->part))
 214           return pair->text;
 215      }
 216    return NULL;
 217 }
 218
 219 static void
 220 _content_set_hook(Elm_Object_Item *it,
 221                   const char *part,
 222                   Evas_Object *content)
 223 {
 224    ELM_OBJ_ITEM_CHECK_OR_RETURN(it);
 225
 226    Elm_Naviframe_Content_Item_Pair *pair = NULL;
 227    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 228
 229    if (!part) return;
 230
 231    //specified parts
 232    if (!strcmp(part, "elm.swallow.content"))
 233      {
 234        _item_content_set(navi_it, content);
 235        return;
 236      }
 237    else if (!strcmp(part, "elm.swallow.prev_btn"))
 238      {
 239        _title_prev_btn_set(navi_it, content, EINA_FALSE);
 240        return;
 241      }
 242    else if(!strcmp(part, "elm.swallow.next_btn"))
 243      {
 244        _title_next_btn_set(navi_it, content);
 245        return;
 246      }
 247
 248    //common part
 249    _title_content_set(navi_it, pair, part, content);
 250 }
 251
 252 /*
 253    */
 254 static Evas_Object *
 255 _content_get_hook(const Elm_Object_Item *it,
 256                   const char *part)
 257 {
 258    ELM_OBJ_ITEM_CHECK_OR_RETURN(it, NULL);
 259    Eina_List *l = NULL;
 260    Elm_Naviframe_Content_Item_Pair *pair = NULL;
 261    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 262
 263    //specified parts
 264    if (!strcmp(part, "elm.swallow.content"))
 265      return navi_it->content;
 266    else if (!strcmp(part, "elm.swallow.prev_btn"))
 267      return navi_it->title_prev_btn;
 268    else if(!strcmp(part, "elm.swallow.next_btn"))
 269      return navi_it->title_next_btn;
 270
 271    //common parts
 272    EINA_LIST_FOREACH(navi_it->content_list, l, pair)
 273      {
 274         if (!strcmp(part, pair->part))
 275           return pair->content;
 276      }
 277    return NULL;
 278 }
 279
 280 static Evas_Object *
 281 _content_unset_hook(Elm_Object_Item *it __UNUSED__,
 282                     const char *part __UNUSED__)
 283 {
 284    ELM_OBJ_ITEM_CHECK_OR_RETURN(it, NULL);
 285    Eina_List *l = NULL;
 286    Elm_Naviframe_Content_Item_Pair *pair = NULL;
 287    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 288    Evas_Object *content = NULL;
 289    char buf[1028];
 290
 291   if (!part) return NULL;
 292
 293   //specified parts
 294   //FIXME: could be unset the below specified contents also.
 295    if (!strcmp(part, "elm.swallow.content") ||
 296        !strcmp(part, "elm.swallow.prev_btn") ||
 297        !strcmp(part, "elm.swallow.next_btn"))
 298      {
 299         WRN("You can not unset the content! : naviframe=%p",
 300             navi_it->base.widget);
 301         return NULL;
 302      }
 303
 304   //common parts
 305    EINA_LIST_FOREACH(navi_it->content_list, l, pair)
 306      {
 307         if (!strcmp(part, pair->part))
 308           {
 309              content = pair->content;
 310              eina_stringshare_del(pair->part);
 311              navi_it->content_list = eina_list_remove(navi_it->content_list,
 312                                                       pair);
 313              free(pair);
 314              break;
 315           }
 316      }
 317
 318    if (!content) return NULL;
 319
 320    elm_widget_sub_object_del(navi_it->base.widget, content);
 321    edje_object_part_unswallow(navi_it->base.view, content);
 322    snprintf(buf, sizeof(buf), "elm,state,%s,hide", part);
 323    edje_object_signal_emit(navi_it->base.view, buf, "elm");
 324    evas_object_event_callback_del(content,
 325                                   EVAS_CALLBACK_DEL,
 326                                   _title_content_del);
 327    _item_sizing_eval(navi_it);
 328
 329    return content;
 330 }
 331
 332 static void
 333 _sizing_eval(Evas_Object *obj)
 334 {
 335    Widget_Data *wd;
 336    Eina_List *list;
 337    Elm_Naviframe_Item *it;
 338    wd  = elm_widget_data_get(obj);
 339    if (!wd) return;
 340
 341    list = eina_list_last(wd->stack);
 342    if (!list) return;
 343
 344    EINA_LIST_FOREACH(wd->stack, list, it)
 345      _item_sizing_eval(it);
 346 }
 347
 348 static void
 349 _item_sizing_eval(Elm_Naviframe_Item *it)
 350 {
 351    Widget_Data *wd;
 352    Evas_Coord x, y, w, h;
 353    if (!it) return;
 354
 355    wd = elm_widget_data_get(it->base.widget);
 356    if (!wd) return;
 357
 358    evas_object_geometry_get(it->base.widget, &x, &y, &w, &h);
 359    evas_object_move(it->base.view, x, y);
 360    evas_object_resize(it->base.view, w, h);
 361 }
 362
 363 static void
 364 _move(void *data __UNUSED__,
 365       Evas *e __UNUSED__,
 366       Evas_Object *obj,
 367       void *event_info __UNUSED__)
 368 {
 369    _sizing_eval(obj);
 370 }
 371
 372 static void
 373 _resize(void *data __UNUSED__,
 374         Evas *e __UNUSED__,
 375         Evas_Object *obj,
 376         void *event_info __UNUSED__)
 377 {
 378    _sizing_eval(obj);
 379 }
 380
 381 static void
 382 _title_clicked(void *data,
 383                Evas_Object *obj __UNUSED__,
 384                const char *emission __UNUSED__,
 385                const char *source __UNUSED__)
 386 {
 387    Elm_Naviframe_Item *it = data;
 388    evas_object_smart_callback_call(it->base.widget, SIG_TITLE_CLICKED, it);
 389 }
 390
 391 static void
 392 _back_btn_clicked(void *data,
 393                   Evas_Object *obj __UNUSED__,
 394                   void *event_info __UNUSED__)
 395 {
 396    elm_naviframe_item_pop(data);
 397 }
 398
 399 static Evas_Object *
 400 _back_btn_new(Evas_Object *obj)
 401 {
 402    Evas_Object *btn;
 403    char buf[1024];
 404    btn = elm_button_add(obj);
 405    if (!btn) return NULL;
 406    evas_object_smart_callback_add(btn, "clicked", _back_btn_clicked, obj);
 407    snprintf(buf, sizeof(buf), "naviframe/back_btn/%s", elm_widget_style_get(obj));
 408    elm_object_style_set(btn, buf);
 409    return btn;
 410 }
 411
 412 static void
 413 _title_content_del(void *data,
 414                    Evas *e __UNUSED__,
 415                    Evas_Object *obj __UNUSED__,
 416                    void *event_info __UNUSED__)
 417 {
 418    char buf[1024];
 419    Elm_Naviframe_Content_Item_Pair *pair = data;
 420    Elm_Naviframe_Item *it = pair->it;
 421    snprintf(buf, sizeof(buf), "elm,state,%s,hide", pair->part);
 422    edje_object_signal_emit(it->base.view, buf, "elm");
 423    it->content_list = eina_list_remove(it->content_list, pair);
 424    eina_stringshare_del(pair->part);
 425    free(pair);
 426 }
 427
 428 static void
 429 _title_prev_btn_del(void *data,
 430                     Evas *e __UNUSED__,
 431                     Evas_Object *obj __UNUSED__,
 432                     void *event_info __UNUSED__)
 433 {
 434    Elm_Naviframe_Item *it = data;
 435    it->back_btn = EINA_FALSE;
 436    it->title_prev_btn = NULL;
 437 }
 438
 439 static void
 440 _title_next_btn_del(void *data,
 441                     Evas *e __UNUSED__,
 442                     Evas_Object *obj __UNUSED__,
 443                     void *event_info __UNUSED__)
 444 {
 445    Elm_Naviframe_Item *it = data;
 446    it->title_next_btn = NULL;
 447 }
 448
 449 static void
 450 _item_content_del(void *data,
 451                   Evas *e __UNUSED__,
 452                   Evas_Object *obj __UNUSED__,
 453                   void *event_info __UNUSED__)
 454 {
 455    Elm_Naviframe_Item *it = data;
 456    it->content = NULL;
 457    edje_object_signal_emit(it->base.view, "elm,state,content,hide", "elm");
 458 }
 459
 460 static void
 461 _title_content_set(Elm_Naviframe_Item *it,
 462                    Elm_Naviframe_Content_Item_Pair *pair,
 463                    const char *part,
 464                    Evas_Object *content)
 465 {
 466    Eina_List *l = NULL;
 467    char buf[1024];
 468
 469    EINA_LIST_FOREACH(it->content_list, l, pair)
 470      {
 471         if (!strcmp(part, pair->part))
 472           {
 473              if (pair->content == content) return;
 474              break;
 475           }
 476      }
 477
 478    if (!pair)
 479      {
 480         pair = ELM_NEW(Elm_Naviframe_Content_Item_Pair);
 481         if (!pair)
 482           {
 483              ERR("Failed to allocate new content part of the item! : naviframe=%p", it->base.widget);
 484              return;
 485           }
 486         pair->it = it;
 487         eina_stringshare_replace(&pair->part, part);
 488         it->content_list = eina_list_append(it->content_list, pair);
 489      }
 490
 491    if (pair->content) evas_object_del(pair->content);
 492    pair->content = content;
 493
 494    if (!content)
 495      {
 496         snprintf(buf, sizeof(buf), "elm,state,%s,hide", part);
 497         edje_object_signal_emit(it->base.view, buf, "elm");
 498         return;
 499      }
 500
 501    elm_widget_sub_object_add(it->base.widget, content);
 502    edje_object_part_swallow(it->base.view, part, content);
 503    snprintf(buf, sizeof(buf), "elm,state,%s,show", part);
 504    edje_object_signal_emit(it->base.view, buf, "elm");
 505    evas_object_event_callback_add(content,
 506                                   EVAS_CALLBACK_DEL,
 507                                   _title_content_del,
 508                                   pair);
 509    _item_sizing_eval(it);
 510 }
 511
 512 static void
 513 _title_prev_btn_set(Elm_Naviframe_Item *it, Evas_Object *btn, Eina_Bool back_btn)
 514 {
 515    char buf[1024];
 516
 517    if (it->title_prev_btn == btn) return;
 518
 519    if (it->title_prev_btn)
 520      evas_object_del(it->title_prev_btn);
 521
 522    it->title_prev_btn = btn;
 523
 524    if (!btn) return;
 525
 526    elm_widget_sub_object_add(it->base.widget, btn);
 527    evas_object_event_callback_add(btn,
 528                                   EVAS_CALLBACK_DEL,
 529                                   _title_prev_btn_del,
 530                                   it);
 531    edje_object_part_swallow(it->base.view, "elm.swallow.prev_btn", btn);
 532    it->back_btn = back_btn;
 533
 534    _item_sizing_eval(it);
 535 }
 536
 537 static void
 538 _title_next_btn_set(Elm_Naviframe_Item *it, Evas_Object *btn)
 539 {
 540    char buf[1024];
 541
 542    if (it->title_next_btn == btn) return;
 543
 544    if (it->title_next_btn)
 545      evas_object_del(it->title_next_btn);
 546
 547    it->title_next_btn = btn;
 548
 549    if (!btn) return;
 550
 551    elm_object_style_set(btn, buf);
 552    elm_widget_sub_object_add(it->base.widget, btn);
 553    evas_object_event_callback_add(btn,
 554                                   EVAS_CALLBACK_DEL,
 555                                   _title_next_btn_del,
 556                                   it);
 557    edje_object_part_swallow(it->base.view, "elm.swallow.next_btn", btn);
 558
 559    _item_sizing_eval(it);
 560 }
 561
 562 static void
 563 _item_del(Elm_Naviframe_Item *it)
 564 {
 565    Widget_Data *wd;
 566    Eina_List *l;
 567    Elm_Naviframe_Content_Item_Pair *content_pair;
 568    Elm_Naviframe_Text_Item_Pair *text_pair;
 569
 570    if (!it) return;
 571
 572    wd = elm_widget_data_get(it->base.widget);
 573    if (!wd) return;
 574
 575    if (it->title_prev_btn)
 576      evas_object_del(it->title_prev_btn);
 577    if (it->title_next_btn)
 578      evas_object_del(it->title_next_btn);
 579       if ((it->content) && (!wd->preserve))
 580      evas_object_del(it->content);
 581
 582    EINA_LIST_FOREACH(it->content_list, l, content_pair)
 583      evas_object_del(content_pair->content);
 584
 585    EINA_LIST_FOREACH(it->text_list, l, text_pair)
 586      {
 587         eina_stringshare_del(text_pair->part);
 588         eina_stringshare_del(text_pair->text);
 589      }
 590
 591    eina_list_free(it->content_list);
 592    eina_list_free(it->text_list);
 593
 594    evas_object_del(it->base.view);
 595
 596    wd->stack = eina_list_remove(wd->stack, it);
 597
 598    free(it);
 599 }
 600
 601 static void
 602 _pushed_finished(void *data,
 603                  Evas_Object *obj __UNUSED__,
 604                  const char *emission __UNUSED__,
 605                  const char *source __UNUSED__)
 606 {
 607    Elm_Naviframe_Item *it = data;
 608    if (!it) return;
 609    evas_object_hide(it->base.view);
 610 }
 611
 612 static void
 613 _popped_finished(void *data,
 614                  Evas_Object *obj __UNUSED__,
 615                  const char *emission __UNUSED__,
 616                  const char *source __UNUSED__)
 617 {
 618    _item_del(data);
 619 }
 620
 621 static void
 622 _show_finished(void *data,
 623                Evas_Object *obj __UNUSED__,
 624                const char *emission __UNUSED__,
 625                const char *source __UNUSED__)
 626 {
 627    Elm_Naviframe_Item *it;
 628    Widget_Data *wd;
 629
 630    it = data;
 631    if (!it) return;
 632    wd =  elm_widget_data_get(it->base.widget);
 633    if (!wd) return;
 634
 635    evas_object_smart_callback_call(it->base.widget,
 636                                    SIG_TRANSITION_FINISHED,
 637                                    (void *) EINA_TRUE);
 638    if (wd->pass_events)
 639      evas_object_pass_events_set(wd->base, EINA_FALSE);
 640 }
 641
 642 static void
 643 _item_content_set(Elm_Naviframe_Item *navi_it, Evas_Object *content)
 644 {
 645    if (navi_it->content == content) return;
 646    if (navi_it->content) evas_object_del(navi_it->content);
 647    elm_widget_sub_object_add(navi_it->base.widget, content);
 648    edje_object_part_swallow(navi_it->base.view, "elm.swallow.content", content);
 649    if (content)
 650      edje_object_signal_emit(navi_it->base.view,
 651                              "elm,state,content,show",
 652                              "elm");
 653    else
 654      edje_object_signal_emit(navi_it->base.view,
 655                              "elm,state,content,hide",
 656                              "elm");
 657    evas_object_event_callback_add(content,
 658                                   EVAS_CALLBACK_DEL,
 659                                   _item_content_del,
 660                                   navi_it);
 661    navi_it->content = content;
 662    _item_sizing_eval(navi_it);
 663 }
 664
 665 EAPI Evas_Object *
 666 elm_naviframe_add(Evas_Object *parent)
 667 {
 668    Evas_Object *obj;
 669    Evas *e;
 670    Widget_Data *wd;
 671
 672    ELM_WIDGET_STANDARD_SETUP(wd, Widget_Data, parent, e, obj, NULL);
 673    ELM_SET_WIDTYPE(widtype, "naviframe");
 674    elm_widget_type_set(obj, "naviframe");
 675    elm_widget_sub_object_add(parent, obj);
 676    elm_widget_data_set(obj, wd);
 677    elm_widget_del_hook_set(obj, _del_hook);
 678    elm_widget_disable_hook_set(obj, _disable_hook);
 679    elm_widget_theme_hook_set(obj, _theme_hook);
 680
 681    //base
 682    wd->base = edje_object_add(e);
 683    elm_widget_resize_object_set(obj, wd->base);
 684    _elm_theme_object_set(obj, wd->base, "naviframe", "base", "default");
 685
 686    evas_object_event_callback_add(obj, EVAS_CALLBACK_MOVE, _move, obj);
 687    evas_object_event_callback_add(obj, EVAS_CALLBACK_RESIZE, _resize, obj);
 688    evas_object_smart_callbacks_descriptions_set(obj, _signals);
 689
 690    wd->pass_events = EINA_TRUE;
 691
 692    return obj;
 693 }
 694
 695 EAPI Elm_Object_Item *
 696 elm_naviframe_item_push(Evas_Object *obj, const char *title_label, Evas_Object *prev_btn, Evas_Object *next_btn, Evas_Object *content, const char *item_style)
 697 {
 698    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 699    Widget_Data *wd;
 700    Elm_Naviframe_Item *prev_it, *it;
 701
 702    wd = elm_widget_data_get(obj);
 703    if (!wd) return NULL;
 704
 705    //create item
 706    it = elm_widget_item_new(obj, Elm_Naviframe_Item);
 707    if (!it)
 708      {
 709         ERR("Failed to allocate new item! : naviframe=%p", obj);
 710         return NULL;
 711      }
 712
 713    elm_widget_item_text_set_hook_set(it, _text_set_hook);
 714    elm_widget_item_text_get_hook_set(it, _text_get_hook);
 715    elm_widget_item_content_set_hook_set(it, _content_set_hook);
 716    elm_widget_item_content_get_hook_set(it, _content_get_hook);
 717    elm_widget_item_content_unset_hook_set(it, _content_unset_hook);
 718
 719    //item base layout
 720    it->base.view = edje_object_add(evas_object_evas_get(obj));
 721    evas_object_smart_member_add(it->base.view, wd->base);
 722    elm_widget_sub_object_add(obj, it->base.view);
 723    edje_object_signal_callback_add(it->base.view,
 724                                    "elm,action,show,finished",
 725                                    "",
 726                                    _show_finished, it);
 727    edje_object_signal_callback_add(it->base.view,
 728                                    "elm,action,pushed,finished",
 729                                    "",
 730                                    _pushed_finished, it);
 731    edje_object_signal_callback_add(it->base.view,
 732                                    "elm,action,popped,finished",
 733                                    "",
 734                                    _popped_finished, it);
 735    elm_naviframe_item_style_set(ELM_CAST(it), item_style);
 736
 737    //title
 738    edje_object_signal_callback_add(it->base.view,
 739                                    "elm,title,clicked",
 740                                    "elm",
 741                                    _title_clicked, it);
 742
 743    _text_set_hook(ELM_CAST(it), "elm.text.title", title_label);
 744
 745    //title buttons
 746    if ((!prev_btn) && (eina_list_count(wd->stack)))
 747      {
 748         prev_btn = _back_btn_new(obj);
 749         _title_prev_btn_set(it, prev_btn, EINA_TRUE);
 750      }
 751    else
 752      _title_prev_btn_set(it, prev_btn, EINA_FALSE);
 753
 754    _title_next_btn_set(it, next_btn);
 755
 756    _item_content_set(it, content);
 757
 758    _item_sizing_eval(it);
 759    evas_object_show(it->base.view);
 760
 761    prev_it = ELM_CAST(elm_naviframe_top_item_get(obj));
 762    if (prev_it)
 763      {
 764         if (wd->pass_events)
 765           evas_object_pass_events_set(wd->base, EINA_TRUE);
 766         edje_object_signal_emit(prev_it->base.view,
 767                                 "elm,state,pushed",
 768                                 "elm");
 769         edje_object_signal_emit(it->base.view,
 770                                 "elm,state,show",
 771                                 "elm");
 772      }
 773    else
 774      edje_object_signal_emit(it->base.view, "elm,state,visible", "elm");
 775    it->title_visible = EINA_TRUE;
 776    wd->stack = eina_list_append(wd->stack, it);
 777    return ELM_CAST(it);
 778 }
 779
 780 EAPI Evas_Object *
 781 elm_naviframe_item_pop(Evas_Object *obj)
 782 {
 783    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 784    Elm_Naviframe_Item *it, *prev_it;
 785    Widget_Data *wd;
 786    Evas_Object *content = NULL;
 787
 788    wd = elm_widget_data_get(obj);
 789    if (!wd) return NULL;
 790
 791    it = ELM_CAST(elm_naviframe_top_item_get(obj));
 792    if (!it) return NULL;
 793    wd->stack = eina_list_remove(wd->stack, it);
 794
 795    if (wd->preserve)
 796      content = it->content;
 797
 798    prev_it = ELM_CAST(elm_naviframe_top_item_get(obj));
 799    if (prev_it)
 800      {
 801         if (wd->pass_events)
 802           evas_object_pass_events_set(wd->base, EINA_TRUE);
 803         evas_object_show(prev_it->base.view);
 804         evas_object_raise(prev_it->base.view);
 805         edje_object_signal_emit(prev_it->base.view,
 806                                 "elm,state,show",
 807                                 "elm");
 808         edje_object_signal_emit(it->base.view, "elm,state,popped", "elm");
 809      }
 810    else
 811      _item_del(it);
 812
 813    return content;
 814 }
 815
 816 EAPI void
 817 elm_naviframe_content_preserve_on_pop_set(Evas_Object *obj, Eina_Bool preserve)
 818 {
 819    ELM_CHECK_WIDTYPE(obj, widtype);
 820    Widget_Data *wd = elm_widget_data_get(obj);
 821    if (!wd) return;
 822    wd->preserve = !!preserve;
 823 }
 824
 825 EAPI Eina_Bool
 826 elm_naviframe_content_preserve_on_pop_get(const Evas_Object *obj)
 827 {
 828    ELM_CHECK_WIDTYPE(obj, widtype) EINA_FALSE;
 829    Widget_Data *wd = elm_widget_data_get(obj);
 830    if (!wd) return EINA_FALSE;
 831    return wd->preserve;
 832 }
 833
 834 EAPI Elm_Object_Item*
 835 elm_naviframe_top_item_get(const Evas_Object *obj)
 836 {
 837    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 838    Widget_Data *wd = elm_widget_data_get(obj);
 839    if ((!wd) || (!wd->stack)) return NULL;
 840    return eina_list_last(wd->stack)->data;
 841 }
 842
 843 EAPI Elm_Object_Item*
 844 elm_naviframe_bottom_item_get(const Evas_Object *obj)
 845 {
 846    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 847    Widget_Data *wd = elm_widget_data_get(obj);
 848    if (!wd) return NULL;
 849    return NULL;
 850 }
 851
 852 EAPI void
 853 elm_naviframe_item_style_set(Elm_Object_Item *it, const char *item_style)
 854 {
 855    ELM_OBJ_ITEM_CHECK_OR_RETURN(it);
 856    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 857
 858    char buf[256];
 859
 860    if (!item_style) sprintf(buf, "item/basic");
 861    else
 862      {
 863         if (strlen(item_style) > sizeof(buf))
 864           WRN("too much long style name! : naviframe=%p", navi_it->base.widget);
 865         else
 866           sprintf(buf, "item/%s", item_style);
 867      }
 868    _elm_theme_object_set(navi_it->base.widget,
 869                          navi_it->base.view,
 870                          "naviframe",
 871                          buf,
 872                          elm_widget_style_get(navi_it->base.widget));
 873 }
 874
 875 EAPI const char *
 876 elm_naviframe_item_style_get(const Elm_Object_Item *it)
 877 {
 878    ELM_OBJ_ITEM_CHECK_OR_RETURN(it, NULL);
 879    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 880    return navi_it->style;
 881 }
 882
 883 EAPI void
 884 elm_naviframe_item_title_visible_set(Elm_Object_Item *it, Eina_Bool visible)
 885 {
 886    ELM_OBJ_ITEM_CHECK_OR_RETURN(it);
 887    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 888
 889    visible = !!visible;
 890    if (navi_it->title_visible == visible) return;
 891
 892    if (visible)
 893      edje_object_signal_emit(navi_it->base.view, "elm,state,title,show", "elm");
 894    else
 895      edje_object_signal_emit(navi_it->base.view, "elm,state,title,hide", "elm");
 896
 897    navi_it->title_visible = visible;
 898 }
 899
 900 EAPI Eina_Bool
 901 elm_naviframe_item_title_visible_get(const Elm_Object_Item *it)
 902 {
 903    ELM_OBJ_ITEM_CHECK_OR_RETURN(it, EINA_FALSE);
 904    Elm_Naviframe_Item *navi_it = ELM_CAST(it);
 905    return navi_it->title_visible;
 906 }
 907