src/lib/elm_pager.c

   1 #include <Elementary.h>
   2 #include "elm_priv.h"
   3
   4 typedef struct _Widget_Data Widget_Data;
   5 typedef struct _Item Item;
   6
   7 struct _Widget_Data
   8 {
   9    Eina_List *stack;
  10    Item *top, *oldtop;
  11    Evas_Object *rect, *clip;
  12 };
  13
  14 struct _Item
  15 {
  16    Evas_Object *obj, *base, *content;
  17    Evas_Coord minw, minh;
  18    Eina_Bool popme : 1;
  19 };
  20
  21 static const char *widtype = NULL;
  22 static void _del_hook(Evas_Object *obj);
  23 static void _mirrored_set(Evas_Object *obj, Eina_Bool rtl);
  24 static void _theme_hook(Evas_Object *obj);
  25 static void _sizing_eval(Evas_Object *obj);
  26 static void _changed_size_hints(void *data,
  27                                 Evas *e,
  28                                 Evas_Object *obj,
  29                                 void *event_info);
  30 static void _content_del(void *data,
  31                          Evas *e,
  32                          Evas_Object *obj,
  33                          void *event_info);
  34 static Eina_List *_item_get(Evas_Object *obj, Evas_Object *content);
  35
  36 static const char SIG_HIDE_FINISHED[] = "hide,finished";
  37
  38 static const Evas_Smart_Cb_Description _signals[] = {
  39    {SIG_HIDE_FINISHED, ""},
  40    {NULL, NULL}
  41 };
  42
  43 static void
  44 _del_hook(Evas_Object *obj)
  45 {
  46    Widget_Data *wd = elm_widget_data_get(obj);
  47    if (!wd) return;
  48    free(wd);
  49 }
  50
  51 static void
  52 _mirrored_set(Evas_Object *obj, Eina_Bool rtl)
  53 {
  54    Widget_Data *wd = elm_widget_data_get(obj);
  55    Eina_List *l;
  56    Item *it;
  57    if (!wd) return;
  58    EINA_LIST_FOREACH(wd->stack, l, it)
  59       edje_object_mirrored_set(it->base, rtl);
  60 }
  61
  62 static void
  63 _theme_hook(Evas_Object *obj)
  64 {
  65    Widget_Data *wd = elm_widget_data_get(obj);
  66    Eina_List *l;
  67    Item *it;
  68    if (!wd) return;
  69    _elm_widget_mirrored_reload(obj);
  70    _mirrored_set(obj, elm_widget_mirrored_get(obj));
  71    EINA_LIST_FOREACH(wd->stack, l, it)
  72      {
  73         _elm_theme_object_set(obj, it->base,  "pager", "base",
  74                               elm_widget_style_get(obj));
  75         edje_object_scale_set(it->base, elm_widget_scale_get(obj) *
  76                               _elm_config->scale);
  77      }
  78    _sizing_eval(obj);
  79 }
  80
  81 static Eina_List *
  82 _item_get(Evas_Object *obj, Evas_Object *content)
  83 {
  84    Widget_Data *wd = elm_widget_data_get(obj);
  85    Item *it;
  86    Eina_List *l;
  87    if (!wd) return NULL;
  88
  89    EINA_LIST_FOREACH(wd->stack, l, it)
  90      {
  91         if (it->content == content)
  92           return l;
  93      }
  94
  95    return NULL;
  96 }
  97
  98 static Eina_Bool
  99 _elm_pager_focus_next_hook(const Evas_Object *obj, Elm_Focus_Direction dir, Evas_Object **next)
 100 {
 101    Widget_Data *wd = elm_widget_data_get(obj);
 102    Evas_Object *cur;
 103
 104    if ((!wd) || (!wd->top))
 105      return EINA_FALSE;
 106
 107    cur = wd->top->content;
 108
 109    /* Try Focus cycle in subitem */
 110    return elm_widget_focus_next_get(cur, dir, next);
 111 }
 112
 113 static void
 114 _sizing_eval(Evas_Object *obj)
 115 {
 116    Widget_Data *wd = elm_widget_data_get(obj);
 117    Evas_Coord minw = -1, minh = -1;
 118    Eina_List *l;
 119    Item *it;
 120    if (!wd) return;
 121    EINA_LIST_FOREACH(wd->stack, l, it)
 122      {
 123         if (it->minw > minw) minw = it->minw;
 124         if (it->minh > minh) minh = it->minh;
 125      }
 126    evas_object_size_hint_min_set(obj, minw, minh);
 127    evas_object_size_hint_max_set(obj, -1, -1);
 128 }
 129
 130 static void
 131 _changed_size_hints(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
 132 {
 133    Item *it = data;
 134    Evas_Coord minw = -1, minh = -1;
 135    evas_object_size_hint_min_get(it->content, &minw, &minh);
 136    // FIXME: why is this needed? how does edje get this unswallowed or
 137    // lose its callbacks to edje
 138    edje_object_part_swallow(it->base, "elm.swallow.content", it->content);
 139    edje_object_size_min_calc(it->base, &it->minw, &it->minh);
 140    _sizing_eval(it->obj);
 141 }
 142
 143 static void
 144 _eval_top(Evas_Object *obj)
 145 {
 146    Widget_Data *wd = elm_widget_data_get(obj);
 147    Item *ittop;
 148    if (!wd) return;
 149    if (!wd->stack) return;
 150    ittop = eina_list_last(wd->stack)->data;
 151    if (ittop != wd->top)
 152      {
 153         Evas_Object *o;
 154         const char *onshow, *onhide;
 155
 156         if (wd->top)
 157           {
 158              o = wd->top->base;
 159              if (wd->top->popme)
 160                {
 161                   edje_object_signal_emit(o, "elm,action,pop", "elm");
 162                   wd->stack = eina_list_remove(wd->stack, wd->top);
 163                }
 164              else
 165                edje_object_signal_emit(o, "elm,action,hide", "elm");
 166              onhide = edje_object_data_get(o, "onhide");
 167              if (onhide)
 168                {
 169                   if (!strcmp(onhide, "raise")) evas_object_raise(o);
 170                   else if (!strcmp(onhide, "lower")) evas_object_lower(o);
 171                }
 172           }
 173         wd->oldtop = wd->top;
 174         wd->top = ittop;
 175         o = wd->top->base;
 176         evas_object_show(o);
 177         if (wd->oldtop)
 178           {
 179              if (elm_object_focus_get(wd->oldtop->content))
 180                elm_widget_focused_object_clear(wd->oldtop->content);
 181              if (wd->oldtop->popme)
 182                edje_object_signal_emit(o, "elm,action,show", "elm");
 183              else
 184                edje_object_signal_emit(o, "elm,action,push", "elm");
 185           }
 186         else
 187           edje_object_signal_emit(o, "elm,action,push", "elm");
 188         onshow = edje_object_data_get(o, "onshow");
 189         if (onshow)
 190           {
 191              if (!strcmp(onshow, "raise")) evas_object_raise(o);
 192              else if (!strcmp(onshow, "lower")) evas_object_lower(o);
 193           }
 194      }
 195 }
 196
 197 static void
 198 _move(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
 199 {
 200    Widget_Data *wd = elm_widget_data_get(data);
 201    Evas_Coord x, y;
 202    Eina_List *l;
 203    Item *it;
 204    if (!wd) return;
 205    evas_object_geometry_get(obj, &x, &y, NULL, NULL);
 206    EINA_LIST_FOREACH(wd->stack, l, it)
 207      evas_object_move(it->base, x, y);
 208 }
 209
 210 static void
 211 _content_del(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
 212 {
 213    Widget_Data *wd = elm_widget_data_get(data);
 214    Eina_List *l;
 215    Item *it;
 216    if (!wd) return;
 217    l = _item_get(data, obj);
 218    if (!l) return;
 219    it = l->data;
 220    wd->stack = eina_list_remove_list(wd->stack, l);
 221    evas_object_event_callback_del_full
 222       (obj, EVAS_CALLBACK_CHANGED_SIZE_HINTS, _changed_size_hints, it);
 223    evas_object_del(it->base);
 224    _eval_top(data);
 225    free(it);
 226 }
 227
 228 static void
 229 _resize(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
 230 {
 231    Widget_Data *wd = elm_widget_data_get(data);
 232    Evas_Coord w, h;
 233    Eina_List *l;
 234    Item *it;
 235    if (!wd) return;
 236    evas_object_geometry_get(obj, NULL, NULL, &w, &h);
 237    EINA_LIST_FOREACH(wd->stack, l, it) evas_object_resize(it->base, w, h);
 238 }
 239
 240 static void
 241 _signal_hide_finished(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 242 {
 243    Item *it = data;
 244    Evas_Object *obj2 = it->obj;
 245    Evas_Object *content = it->content;
 246
 247    if (it->popme)
 248      {
 249         evas_object_del(it->base);
 250         evas_object_event_callback_del_full(content,
 251                                             EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 252                                             _changed_size_hints,
 253                                             it);
 254         evas_object_event_callback_del(content,
 255                                        EVAS_CALLBACK_DEL,
 256                                        _content_del);
 257         evas_object_del(content);
 258         free(it);
 259      }
 260    else
 261      {
 262         evas_object_hide(it->base);
 263         edje_object_signal_emit(it->base, "elm,action,reset", "elm");
 264         edje_object_message_signal_process(it->base);
 265         evas_object_hide(content);
 266      }
 267     evas_object_smart_callback_call(obj2, SIG_HIDE_FINISHED, content);
 268     _sizing_eval(obj2);
 269 }
 270
 271 EAPI Evas_Object *
 272 elm_pager_add(Evas_Object *parent)
 273 {
 274    Evas_Object *obj;
 275    Evas *e;
 276    Widget_Data *wd;
 277
 278    ELM_WIDGET_STANDARD_SETUP(wd, Widget_Data, parent, e, obj, NULL);
 279
 280    ELM_SET_WIDTYPE(widtype, "pager");
 281    elm_widget_type_set(obj, "pager");
 282    elm_widget_sub_object_add(parent, obj);
 283    elm_widget_data_set(obj, wd);
 284    elm_widget_del_hook_set(obj, _del_hook);
 285    elm_widget_theme_hook_set(obj, _theme_hook);
 286    elm_widget_focus_next_hook_set(obj, _elm_pager_focus_next_hook);
 287    elm_widget_can_focus_set(obj, EINA_FALSE);
 288
 289    wd->clip = evas_object_rectangle_add(e);
 290    elm_widget_resize_object_set(obj, wd->clip);
 291    elm_widget_sub_object_add(obj, wd->clip);
 292
 293    wd->rect = evas_object_rectangle_add(e);
 294    elm_widget_sub_object_add(obj, wd->rect);
 295    evas_object_color_set(wd->rect, 255, 255, 255, 0);
 296    evas_object_clip_set(wd->rect, wd->clip);
 297
 298    evas_object_event_callback_add(obj, EVAS_CALLBACK_MOVE, _move, obj);
 299    evas_object_event_callback_add(obj, EVAS_CALLBACK_RESIZE, _resize, obj);
 300
 301    evas_object_smart_callbacks_descriptions_set(obj, _signals);
 302
 303    _mirrored_set(obj, elm_widget_mirrored_get(obj));
 304    _sizing_eval(obj);
 305    return obj;
 306 }
 307
 308 EAPI void
 309 elm_pager_content_push(Evas_Object *obj, Evas_Object *content)
 310 {
 311    ELM_CHECK_WIDTYPE(obj, widtype);
 312    Widget_Data *wd = elm_widget_data_get(obj);
 313    Evas_Coord x, y, w, h;
 314    Item *it;
 315
 316    if ((!wd) || (!content)) return;
 317    if (_item_get(obj, content)) return;
 318
 319    it = ELM_NEW(Item);
 320    if (!it) return;
 321    it->obj = obj;
 322    it->content = content;
 323    it->base = edje_object_add(evas_object_evas_get(obj));
 324    evas_object_smart_member_add(it->base, obj);
 325    evas_object_geometry_get(obj, &x, &y, &w, &h);
 326    evas_object_move(it->base, x, y);
 327    evas_object_resize(it->base, w, h);
 328    evas_object_clip_set(it->base, wd->clip);
 329    elm_widget_sub_object_add(obj, it->base);
 330    elm_widget_sub_object_add(obj, it->content);
 331    _elm_theme_object_set(obj,
 332                          it->base,
 333                          "pager",
 334                          "base",
 335                          elm_widget_style_get(obj));
 336    edje_object_signal_callback_add(it->base,
 337                                    "elm,action,hide,finished",
 338                                    "",
 339                                    _signal_hide_finished,
 340                                    it);
 341    evas_object_event_callback_add(it->content,
 342                                   EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 343                                   _changed_size_hints,
 344                                   it);
 345    evas_object_event_callback_add(it->content,
 346                                   EVAS_CALLBACK_DEL,
 347                                   _content_del,
 348                                   obj);
 349    edje_object_part_swallow(it->base, "elm.swallow.content", it->content);
 350    edje_object_size_min_calc(it->base, &it->minw, &it->minh);
 351    evas_object_data_set(it->base, "_elm_leaveme", obj);
 352    evas_object_show(it->content);
 353    wd->stack = eina_list_append(wd->stack, it);
 354    _eval_top(obj);
 355    _sizing_eval(obj);
 356 }
 357
 358 EAPI void
 359 elm_pager_content_pop(Evas_Object *obj)
 360 {
 361    ELM_CHECK_WIDTYPE(obj, widtype);
 362    Widget_Data *wd = elm_widget_data_get(obj);
 363    Eina_List *ll;
 364    Item *it;
 365    if (!wd) return;
 366    if (!wd->stack) return;
 367    it = eina_list_last(wd->stack)->data;
 368    it->popme = EINA_TRUE;
 369    ll = eina_list_last(wd->stack);
 370    if (ll)
 371      {
 372         ll = ll->prev;
 373         if (!ll)
 374           {
 375              Evas_Object *o;
 376              const char *onhide;
 377
 378              wd->top = it;
 379              o = wd->top->base;
 380              edje_object_signal_emit(o, "elm,action,pop", "elm");
 381              wd->stack = eina_list_remove(wd->stack, it);
 382              onhide = edje_object_data_get(o, "onhide");
 383              if (onhide)
 384                {
 385                   if (!strcmp(onhide, "raise")) evas_object_raise(o);
 386                   else if (!strcmp(onhide, "lower")) evas_object_lower(o);
 387                }
 388              wd->top = NULL;
 389           }
 390         else
 391           {
 392              it = ll->data;
 393              elm_pager_content_promote(obj, it->content);
 394           }
 395      }
 396 }
 397
 398 static void
 399 _del_job(void *data)
 400 {
 401    Evas_Object *obj = data;
 402    evas_object_del(obj);
 403 }
 404
 405 EAPI void
 406 elm_pager_to_content_pop(Evas_Object *obj, Evas_Object *content)
 407 {
 408    ELM_CHECK_WIDTYPE(obj, widtype);
 409    Widget_Data *wd = elm_widget_data_get(obj);
 410    Eina_List *ll;
 411    Item *it;
 412    if (!wd) return;
 413    if (!wd->stack) return;
 414    it = eina_list_last(wd->stack)->data;
 415    it->popme = EINA_TRUE;
 416    ll = eina_list_last(wd->stack);
 417    if (ll)
 418      {
 419         while(ll)
 420           {
 421              it = ll->data;
 422              if(it->content != content)
 423                {
 424                   wd->stack = eina_list_remove_list(wd->stack, ll);
 425                   ecore_job_add(_del_job, it->content);
 426                   it->content = NULL;
 427                }
 428              else
 429                break;
 430
 431              ll = ll->prev;
 432           }
 433      }
 434    _eval_top(it->obj);
 435 }
 436
 437 EAPI void
 438 elm_pager_content_promote(Evas_Object *obj, Evas_Object *content)
 439 {
 440    ELM_CHECK_WIDTYPE(obj, widtype);
 441    Widget_Data *wd = elm_widget_data_get(obj);
 442    Eina_List *l;
 443    Item *it;
 444    if (!wd) return;
 445    l = _item_get(obj, content);
 446    if (!l) return;
 447
 448    it = l->data;
 449    wd->stack = eina_list_remove_list(wd->stack, l);
 450    wd->stack = eina_list_append(wd->stack, it);
 451    _eval_top(obj);
 452 }
 453
 454 EAPI Evas_Object *
 455 elm_pager_content_bottom_get(const Evas_Object *obj)
 456 {
 457    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 458    Widget_Data *wd = elm_widget_data_get(obj);
 459    Item *it;
 460    if (!wd) return NULL;
 461    if (!wd->stack) return NULL;
 462    it = wd->stack->data;
 463    return it->content;
 464 }
 465
 466 EAPI Evas_Object *
 467 elm_pager_content_top_get(const Evas_Object *obj)
 468 {
 469    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 470    Widget_Data *wd = elm_widget_data_get(obj);
 471    if (!wd) return NULL;
 472    if (!wd->top) return NULL;
 473    return wd->top->content;
 474 }