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