src/lib/elm_carousel.c

   1 #include <Elementary.h>
   2 #include "elm_priv.h"
   3
   4 // FIXME: this is NOT the carousel - yet!
   5
   6 typedef struct _Widget_Data Widget_Data;
   7
   8 struct _Widget_Data
   9 {
  10    Evas_Object *scr, *bx;
  11    Eina_List *items;
  12    int icon_size;
  13 };
  14
  15 struct _Elm_Carousel_Item
  16 {
  17    Evas_Object *obj, *base, *icon;
  18    const char *label;
  19    Evas_Smart_Cb func;
  20    const void *data;
  21    Eina_Bool selected : 1;
  22 };
  23
  24 static const char *widtype = NULL;
  25 static void _del_hook(Evas_Object *obj);
  26 static void _theme_hook(Evas_Object *obj);
  27 static void _sizing_eval(Evas_Object *obj);
  28
  29 static void
  30 _item_show(Elm_Carousel_Item *it)
  31 {
  32    Widget_Data *wd = elm_widget_data_get(it->obj);
  33    Evas_Coord x, y, w, h, bx, by;
  34    if (!wd) return;
  35    evas_object_geometry_get(wd->bx, &bx, &by, NULL, NULL);
  36    evas_object_geometry_get(it->base, &x, &y, &w, &h);
  37    elm_smart_scroller_child_region_show(wd->scr, x - bx, y - by, w, h);
  38 }
  39
  40 static void
  41 _item_select(Elm_Carousel_Item *it)
  42 {
  43    Elm_Carousel_Item *it2;
  44    Widget_Data *wd = elm_widget_data_get(it->obj);
  45    Evas_Object *obj2;
  46    const Eina_List *l;
  47    if (!wd) return;
  48    if (it->selected) return;
  49    EINA_LIST_FOREACH(wd->items, l, it2)
  50      {
  51         if (it2->selected)
  52           {
  53              it2->selected = EINA_FALSE;
  54              edje_object_signal_emit(it2->base, "elm,state,unselected", "elm");
  55              break;
  56           }
  57      }
  58    it->selected = EINA_TRUE;
  59    edje_object_signal_emit(it->base, "elm,state,selected", "elm");
  60    _item_show(it);
  61    obj2 = it->obj;
  62    if (it->func) it->func((void *)(it->data), it->obj, it);
  63    evas_object_smart_callback_call(obj2, "clicked", it);
  64 }
  65
  66 static void
  67 _del_hook(Evas_Object *obj)
  68 {
  69    Widget_Data *wd = elm_widget_data_get(obj);
  70    if (!wd) return;
  71    free(wd);
  72 }
  73
  74 static void
  75 _theme_hook(Evas_Object *obj)
  76 {
  77    Widget_Data *wd = elm_widget_data_get(obj);
  78    const Eina_List *l;
  79    const Elm_Carousel_Item *it;
  80    if (!wd) return;
  81    EINA_LIST_FOREACH(wd->items, l, it)
  82      {
  83         Evas_Coord mw, mh;
  84
  85         if (it->selected)
  86           edje_object_signal_emit(it->base, "elm,state,selected", "elm");
  87         _elm_theme_object_set(obj, it->base, "carousel", "item", elm_widget_style_get(obj));
  88         edje_object_scale_set(it->base, elm_widget_scale_get(obj) * _elm_config->scale);
  89         if (it->icon)
  90           {
  91              edje_extern_object_min_size_set(it->icon,
  92                                              (double)wd->icon_size * _elm_config->scale,
  93                                              (double)wd->icon_size * _elm_config->scale);
  94              edje_object_part_swallow(it->base, "elm.swallow.icon", it->icon);
  95           }
  96         edje_object_part_text_set(it->base, "elm.text", it->label);
  97         edje_object_size_min_calc(it->base, &mw, &mh);
  98         evas_object_size_hint_min_set(it->base, mw, mh);
  99         evas_object_size_hint_max_set(it->base, 9999, mh);
 100      }
 101    _sizing_eval(obj);
 102 }
 103
 104 static void
 105 _sizing_eval(Evas_Object *obj)
 106 {
 107    Widget_Data *wd = elm_widget_data_get(obj);
 108    Evas_Coord minw = -1, minh = -1, maxw = -1, maxh = -1;
 109    Evas_Coord vw = 0, vh = 0;
 110    if (!wd) return;
 111    edje_object_size_min_calc(elm_smart_scroller_edje_object_get(wd->scr), &minw, &minh);
 112    evas_object_resize(wd->scr, 500, 500);
 113    evas_object_size_hint_min_get(wd->bx, &minw, &minh);
 114    evas_object_resize(wd->bx, minw, minh);
 115    elm_smart_scroller_child_viewport_size_get(wd->scr, &vw, &vh);
 116    minw = minw + (500 - vw);
 117    minh = minh + (500 - vh);
 118    evas_object_size_hint_min_set(obj, minw, minh);
 119    evas_object_size_hint_max_set(obj, maxw, maxh);
 120 }
 121
 122 static void
 123 _resize(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
 124 {
 125    Widget_Data *wd = elm_widget_data_get(data);
 126    Evas_Coord mw, mh, vw, vh, w, h;
 127    const Eina_List *l;
 128    Elm_Carousel_Item *it;
 129    if (!wd) return;
 130    elm_smart_scroller_child_viewport_size_get(wd->scr, &vw, &vh);
 131    evas_object_size_hint_min_get(wd->bx, &mw, &mh);
 132    evas_object_geometry_get(wd->bx, NULL, NULL, &w, &h);
 133    if (vw >= mw)
 134      {
 135         if (w != vw) evas_object_resize(wd->bx, vw, h);
 136      }
 137    EINA_LIST_FOREACH(wd->items, l, it)
 138      {
 139         if (it->selected)
 140           {
 141              _item_show(it);
 142              break;
 143           }
 144      }
 145
 146 }
 147
 148 static void
 149 _select(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 150 {
 151    _item_select(data);
 152 }
 153
 154 EAPI Evas_Object *
 155 elm_carousel_add(Evas_Object *parent)
 156 {
 157    Evas_Object *obj;
 158    Evas *e;
 159    Widget_Data *wd;
 160
 161    wd = ELM_NEW(Widget_Data);
 162    e = evas_object_evas_get(parent);
 163    obj = elm_widget_add(e);
 164    ELM_SET_WIDTYPE(widtype, "carousel");
 165    elm_widget_type_set(obj, "carousel");
 166    elm_widget_sub_object_add(parent, obj);
 167    elm_widget_data_set(obj, wd);
 168    elm_widget_del_hook_set(obj, _del_hook);
 169    elm_widget_theme_hook_set(obj, _theme_hook);
 170    elm_widget_can_focus_set(obj, 0);
 171
 172    wd->scr = elm_smart_scroller_add(e);
 173    elm_smart_scroller_widget_set(wd->scr, obj);
 174    elm_smart_scroller_object_theme_set(obj, wd->scr, "carousel", "base", "default");
 175    elm_widget_resize_object_set(obj, wd->scr);
 176    elm_smart_scroller_policy_set(wd->scr,
 177                                  ELM_SMART_SCROLLER_POLICY_AUTO,
 178                                  ELM_SMART_SCROLLER_POLICY_OFF);
 179
 180    wd->icon_size = 32;
 181
 182    wd->bx = evas_object_box_add(e);
 183    evas_object_box_layout_set(wd->bx,
 184                    evas_object_box_layout_homogeneous_horizontal, NULL, NULL);
 185    elm_widget_sub_object_add(obj, wd->bx);
 186    elm_smart_scroller_child_set(wd->scr, wd->bx);
 187    evas_object_show(wd->bx);
 188
 189    evas_object_event_callback_add(wd->scr, EVAS_CALLBACK_RESIZE,
 190                                   _resize, obj);
 191
 192    _sizing_eval(obj);
 193    return obj;
 194 }
 195
 196 EAPI Elm_Carousel_Item *
 197 elm_carousel_item_add(Evas_Object *obj, Evas_Object *icon, const char *label, Evas_Smart_Cb func, const void *data)
 198 {
 199    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 200    Widget_Data *wd = elm_widget_data_get(obj);
 201    if (!wd) return NULL;
 202    Evas_Coord mw, mh;
 203    Elm_Carousel_Item *it = calloc(1, sizeof(Elm_Carousel_Item));
 204
 205    if (!it) return NULL;
 206    wd->items = eina_list_append(wd->items, it);
 207    it->obj = obj;
 208    it->label = eina_stringshare_add(label);
 209    it->icon = icon;
 210    it->func = func;
 211    it->data = data;
 212    it->base = edje_object_add(evas_object_evas_get(obj));
 213    _elm_theme_object_set(obj, it->base, "carousel", "item", elm_widget_style_get(obj));
 214    edje_object_signal_callback_add(it->base, "elm,action,click", "elm",
 215                                    _select, it);
 216    elm_widget_sub_object_add(obj, it->base);
 217    if (it->icon)
 218      {
 219         edje_extern_object_min_size_set(it->icon,
 220                                         (double)wd->icon_size * _elm_config->scale,
 221                                         (double)wd->icon_size * _elm_config->scale);
 222         edje_object_part_swallow(it->base, "elm.swallow.icon", it->icon);
 223         evas_object_show(it->icon);
 224         elm_widget_sub_object_add(obj, it->icon);
 225      }
 226    edje_object_part_text_set(it->base, "elm.text", it->label);
 227    edje_object_size_min_calc(it->base, &mw, &mh);
 228    evas_object_size_hint_weight_set(it->base, 0.0, 0.0);
 229    evas_object_size_hint_align_set(it->base, EVAS_HINT_FILL, EVAS_HINT_FILL);
 230    evas_object_size_hint_min_set(it->base, mw, mh);
 231    evas_object_size_hint_max_set(it->base, 9999, mh);
 232    evas_object_box_append(wd->bx, it->base);
 233    evas_object_show(it->base);
 234    _sizing_eval(obj);
 235    return it;
 236 }
 237
 238 EAPI void
 239 elm_carousel_item_del(Elm_Carousel_Item *it)
 240 {
 241    Widget_Data *wd = elm_widget_data_get(it->obj);
 242    Evas_Object *obj2 = it->obj;
 243    if (!wd) return;
 244    wd->items = eina_list_remove(wd->items, it);
 245    eina_stringshare_del(it->label);
 246    if (it->icon) evas_object_del(it->icon);
 247    evas_object_del(it->base);
 248    free(it);
 249    _theme_hook(obj2);
 250 }
 251
 252 EAPI void
 253 elm_carousel_item_select(Elm_Carousel_Item *item)
 254 {
 255    _item_select(item);
 256 }