src/lib/elm_radio.c

   1 #include <Elementary.h>
   2 #include "elm_priv.h"
   3
   4 typedef struct _Widget_Data Widget_Data;
   5 typedef struct _Group Group;
   6
   7 struct _Group
   8 {
   9    int value;
  10    int *valuep;
  11    Eina_List *radios;
  12 };
  13
  14 struct _Widget_Data
  15 {
  16    Evas_Object *radio;
  17    Evas_Object *icon;
  18    int value;
  19    const char *label;
  20    Eina_Bool state;
  21    Group *group;
  22 };
  23
  24 static const char *widtype = NULL;
  25 static void _state_set(Evas_Object *obj, Eina_Bool state);
  26 static void _del_hook(Evas_Object *obj);
  27 static void _mirrored_set(Evas_Object *obj, Eina_Bool rtl);
  28 static void _theme_hook(Evas_Object *obj);
  29 static void _disable_hook(Evas_Object *obj);
  30 static void _sizing_eval(Evas_Object *obj);
  31 static void _changed_size_hints(void *data, Evas *e, Evas_Object *obj, void *event_info);
  32 static void _sub_del(void *data, Evas_Object *obj, void *event_info);
  33 static void _signal_radio_on(void *data, Evas_Object *obj, const char *emission, const char *source);
  34 static void _on_focus_hook(void *data, Evas_Object *obj);
  35 static void _activate(Evas_Object *obj);
  36 static void _activate_hook(Evas_Object *obj);
  37 static Eina_Bool _event_hook(Evas_Object *obj, Evas_Object *src,
  38                              Evas_Callback_Type type, void *event_info);
  39
  40 static const char SIG_CHANGED[] = "changed";
  41 static const Evas_Smart_Cb_Description _signals[] = {
  42   {SIG_CHANGED, ""},
  43   {NULL, NULL}
  44 };
  45
  46 static Eina_Bool
  47 _event_hook(Evas_Object *obj, Evas_Object *src __UNUSED__, Evas_Callback_Type type, void *event_info)
  48 {
  49    if (type != EVAS_CALLBACK_KEY_DOWN) return EINA_FALSE;
  50    Evas_Event_Key_Down *ev = event_info;
  51    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return EINA_FALSE;
  52    if (elm_widget_disabled_get(obj)) return EINA_FALSE;
  53
  54    if ((strcmp(ev->keyname, "Return")) &&
  55        (strcmp(ev->keyname, "KP_Enter")) &&
  56        (strcmp(ev->keyname, "space")))
  57      return EINA_FALSE;
  58    _activate(obj);
  59    ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
  60    return EINA_TRUE;
  61 }
  62
  63 static void
  64 _del_hook(Evas_Object *obj)
  65 {
  66    Widget_Data *wd = elm_widget_data_get(obj);
  67    if (!wd) return;
  68    if (wd->label) eina_stringshare_del(wd->label);
  69    wd->group->radios = eina_list_remove(wd->group->radios, obj);
  70    if (!wd->group->radios) free(wd->group);
  71    wd->group = NULL;
  72    free(wd);
  73 }
  74
  75 static void
  76 _on_focus_hook(void *data __UNUSED__, Evas_Object *obj)
  77 {
  78    Widget_Data *wd = elm_widget_data_get(obj);
  79    if (!wd) return;
  80    if (elm_widget_focus_get(obj))
  81      {
  82         edje_object_signal_emit(wd->radio, "elm,action,focus", "elm");
  83         evas_object_focus_set(wd->radio, EINA_TRUE);
  84      }
  85    else
  86      {
  87         edje_object_signal_emit(wd->radio, "elm,action,unfocus", "elm");
  88         evas_object_focus_set(wd->radio, EINA_FALSE);
  89      }
  90 }
  91
  92 static void
  93 _mirrored_set(Evas_Object *obj, Eina_Bool rtl)
  94 {
  95    Widget_Data *wd = elm_widget_data_get(obj);
  96    if (!wd) return;
  97    edje_object_mirrored_set(wd->radio, rtl);
  98 }
  99
 100 static void
 101 _theme_hook(Evas_Object *obj)
 102 {
 103    Widget_Data *wd = elm_widget_data_get(obj);
 104    if (!wd) return;
 105    _elm_widget_mirrored_reload(obj);
 106    _mirrored_set(obj, elm_widget_mirrored_get(obj));
 107    _elm_theme_object_set(obj, wd->radio, "radio", "base", elm_widget_style_get(obj));
 108    if (wd->icon)
 109      edje_object_signal_emit(wd->radio, "elm,state,icon,visible", "elm");
 110    else
 111      edje_object_signal_emit(wd->radio, "elm,state,icon,hidden", "elm");
 112    if (wd->state)
 113      edje_object_signal_emit(wd->radio, "elm,state,radio,on", "elm");
 114    else
 115      edje_object_signal_emit(wd->radio, "elm,state,radio,off", "elm");
 116    if (wd->label)
 117      edje_object_signal_emit(wd->radio, "elm,state,text,visible", "elm");
 118    else
 119      edje_object_signal_emit(wd->radio, "elm,state,text,hidden", "elm");
 120    edje_object_part_text_set(wd->radio, "elm.text", wd->label);
 121    if (elm_widget_disabled_get(obj))
 122      {
 123         edje_object_signal_emit(wd->radio, "elm,state,disabled", "elm");
 124         if (wd->state) _state_set(obj, 0);
 125      }
 126    edje_object_message_signal_process(wd->radio);
 127    edje_object_scale_set(wd->radio, elm_widget_scale_get(obj) * _elm_config->scale);
 128    _sizing_eval(obj);
 129 }
 130
 131 static void
 132 _disable_hook(Evas_Object *obj)
 133 {
 134    Widget_Data *wd = elm_widget_data_get(obj);
 135    if (!wd) return;
 136    if (elm_widget_disabled_get(obj))
 137      {
 138         edje_object_signal_emit(wd->radio, "elm,state,disabled", "elm");
 139         if (wd->state) _state_set(obj, 0);
 140      }
 141    else
 142      edje_object_signal_emit(wd->radio, "elm,state,enabled", "elm");
 143 }
 144
 145 static void
 146 _sizing_eval(Evas_Object *obj)
 147 {
 148    Widget_Data *wd = elm_widget_data_get(obj);
 149    Evas_Coord minw = -1, minh = -1;
 150    if (!wd) return;
 151    elm_coords_finger_size_adjust(1, &minw, 1, &minh);
 152    edje_object_size_min_restricted_calc(wd->radio, &minw, &minh, minw, minh);
 153    elm_coords_finger_size_adjust(1, &minw, 1, &minh);
 154    evas_object_size_hint_min_set(obj, minw, minh);
 155    evas_object_size_hint_max_set(obj, -1, -1);
 156 }
 157
 158 static void
 159 _changed_size_hints(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
 160 {
 161    Widget_Data *wd = elm_widget_data_get(data);
 162    if (!wd) return;
 163    if (obj != wd->icon) return;
 164    _sizing_eval(data);
 165 }
 166
 167 static void
 168 _sub_del(void *data __UNUSED__, Evas_Object *obj, void *event_info)
 169 {
 170    Widget_Data *wd = elm_widget_data_get(obj);
 171    Evas_Object *sub = event_info;
 172    if (!wd) return;
 173    if (sub == wd->icon)
 174      {
 175         edje_object_signal_emit(wd->radio, "elm,state,icon,hidden", "elm");
 176         evas_object_event_callback_del_full
 177            (sub, EVAS_CALLBACK_CHANGED_SIZE_HINTS, _changed_size_hints, obj);
 178         wd->icon = NULL;
 179         _sizing_eval(obj);
 180      }
 181 }
 182
 183 static void
 184 _state_set(Evas_Object *obj, Eina_Bool state)
 185 {
 186    Widget_Data *wd = elm_widget_data_get(obj);
 187    if (!wd) return;
 188    if ((state != wd->state) && (!elm_widget_disabled_get(obj)))
 189      {
 190         wd->state = state;
 191         if (wd->state)
 192           edje_object_signal_emit(wd->radio, "elm,state,radio,on", "elm");
 193         else
 194           edje_object_signal_emit(wd->radio, "elm,state,radio,off", "elm");
 195      }
 196 }
 197
 198 static void
 199 _state_set_all(Widget_Data *wd)
 200 {
 201    const Eina_List *l;
 202    Evas_Object *child, *selected = NULL;
 203    Eina_Bool disabled = EINA_FALSE;
 204    EINA_LIST_FOREACH(wd->group->radios, l, child)
 205      {
 206         Widget_Data *wd2 = elm_widget_data_get(child);
 207         if (wd2->state) selected = child;
 208         if (wd2->value == wd->group->value)
 209           {
 210              _state_set(child, 1);
 211              if (!wd2->state) disabled = EINA_TRUE;
 212           }
 213         else _state_set(child, 0);
 214      }
 215    if ((disabled) && (selected)) _state_set(selected, 1);
 216 }
 217
 218 static void
 219 _activate(Evas_Object *obj)
 220 {
 221    Widget_Data *wd = elm_widget_data_get(obj);
 222    if (!wd) return;
 223    if (wd->group->value == wd->value) return;
 224    wd->group->value = wd->value;
 225    if (wd->group->valuep) *(wd->group->valuep) = wd->group->value;
 226    _state_set_all(wd);
 227    evas_object_smart_callback_call(obj, SIG_CHANGED, NULL);
 228 }
 229
 230 static void
 231 _activate_hook(Evas_Object *obj)
 232 {
 233    _activate(obj);
 234 }
 235
 236 static void
 237 _signal_radio_on(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 238 {
 239    _activate(data);
 240 }
 241
 242 static void
 243 _elm_radio_label_set(Evas_Object *obj, const char *item, const char *label)
 244 {
 245    ELM_CHECK_WIDTYPE(obj, widtype);
 246    Widget_Data *wd = elm_widget_data_get(obj);
 247    if (item && strcmp(item, "default")) return;
 248    if (!wd) return;
 249    eina_stringshare_replace(&wd->label, label);
 250    if (label)
 251      {
 252         edje_object_signal_emit(wd->radio, "elm,state,text,visible", "elm");
 253         edje_object_message_signal_process(wd->radio);
 254      }
 255    else
 256      {
 257         edje_object_signal_emit(wd->radio, "elm,state,text,hidden", "elm");
 258         edje_object_message_signal_process(wd->radio);
 259      }
 260    edje_object_part_text_set(wd->radio, "elm.text", label);
 261    _sizing_eval(obj);
 262 }
 263
 264 static const char *
 265 _elm_radio_label_get(const Evas_Object *obj, const char *item)
 266 {
 267    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 268    Widget_Data *wd = elm_widget_data_get(obj);
 269    if (item && strcmp(item, "default")) return NULL;
 270    if (!wd) return NULL;
 271    return wd->label;
 272 }
 273
 274 EAPI Evas_Object *
 275 elm_radio_add(Evas_Object *parent)
 276 {
 277    Evas_Object *obj;
 278    Evas *e;
 279    Widget_Data *wd;
 280
 281    ELM_WIDGET_STANDARD_SETUP(wd, Widget_Data, parent, e, obj, NULL);
 282
 283    ELM_SET_WIDTYPE(widtype, "radio");
 284    elm_widget_type_set(obj, "radio");
 285    elm_widget_sub_object_add(parent, obj);
 286    elm_widget_on_focus_hook_set(obj, _on_focus_hook, NULL);
 287    elm_widget_data_set(obj, wd);
 288    elm_widget_del_hook_set(obj, _del_hook);
 289    elm_widget_theme_hook_set(obj, _theme_hook);
 290    elm_widget_disable_hook_set(obj, _disable_hook);
 291    elm_widget_can_focus_set(obj, EINA_TRUE);
 292    elm_widget_activate_hook_set(obj, _activate_hook);
 293    elm_widget_event_hook_set(obj, _event_hook);
 294    elm_widget_text_set_hook_set(obj, _elm_radio_label_set);
 295    elm_widget_text_get_hook_set(obj, _elm_radio_label_get);
 296
 297    wd->radio = edje_object_add(e);
 298    _elm_theme_object_set(obj, wd->radio, "radio", "base", "default");
 299    edje_object_signal_callback_add(wd->radio, "elm,action,radio,on", "", _signal_radio_on, obj);
 300    edje_object_signal_callback_add(wd->radio, "elm,action,radio,toggle", "", _signal_radio_on, obj);
 301    elm_widget_resize_object_set(obj, wd->radio);
 302
 303    evas_object_smart_callback_add(obj, "sub-object-del", _sub_del, obj);
 304
 305    wd->group = calloc(1, sizeof(Group));
 306    wd->group->radios = eina_list_append(wd->group->radios, obj);
 307    wd->state = 0;
 308
 309    _mirrored_set(obj, elm_widget_mirrored_get(obj));
 310    _sizing_eval(obj);
 311
 312    // TODO: convert Elementary to subclassing of Evas_Smart_Class
 313    // TODO: and save some bytes, making descriptions per-class and not instance!
 314    evas_object_smart_callbacks_descriptions_set(obj, _signals);
 315    return obj;
 316 }
 317
 318 EAPI void
 319 elm_radio_label_set(Evas_Object *obj, const char *label)
 320 {
 321    _elm_radio_label_set(obj, NULL, label);
 322 }
 323
 324 EAPI const char *
 325 elm_radio_label_get(const Evas_Object *obj)
 326 {
 327    return _elm_radio_label_get(obj, NULL);
 328 }
 329
 330 EAPI void
 331 elm_radio_icon_set(Evas_Object *obj, Evas_Object *icon)
 332 {
 333    ELM_CHECK_WIDTYPE(obj, widtype);
 334    Widget_Data *wd = elm_widget_data_get(obj);
 335    if (!wd) return;
 336    if (wd->icon == icon) return;
 337    if (wd->icon) evas_object_del(wd->icon);
 338    wd->icon = icon;
 339    if (icon)
 340      {
 341         elm_widget_sub_object_add(obj, icon);
 342         evas_object_event_callback_add(icon, EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 343                                        _changed_size_hints, obj);
 344         edje_object_part_swallow(wd->radio, "elm.swallow.content", icon);
 345         edje_object_signal_emit(wd->radio, "elm,state,icon,visible", "elm");
 346         edje_object_message_signal_process(wd->radio);
 347      }
 348    _sizing_eval(obj);
 349 }
 350
 351 EAPI Evas_Object *
 352 elm_radio_icon_get(const Evas_Object *obj)
 353 {
 354    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 355    Widget_Data *wd = elm_widget_data_get(obj);
 356    if (!wd) return NULL;
 357    return wd->icon;
 358 }
 359
 360 EAPI Evas_Object *
 361 elm_radio_icon_unset(Evas_Object *obj)
 362 {
 363    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 364    Widget_Data *wd = elm_widget_data_get(obj);
 365    if (!wd) return NULL;
 366    if (!wd->icon) return NULL;
 367    Evas_Object *icon = wd->icon;
 368    elm_widget_sub_object_del(obj, wd->icon);
 369    edje_object_part_unswallow(wd->radio, wd->icon);
 370    wd->icon = NULL;
 371    return icon;
 372 }
 373
 374 EAPI void
 375 elm_radio_group_add(Evas_Object *obj, Evas_Object *group)
 376 {
 377    ELM_CHECK_WIDTYPE(obj, widtype);
 378    Widget_Data *wd = elm_widget_data_get(obj);
 379    Widget_Data *wd2 = elm_widget_data_get(group);
 380    if (!wd) return;
 381    if (!wd2)
 382      {
 383         if (eina_list_count(wd->group->radios) == 1)
 384           return;
 385         wd->group->radios = eina_list_remove(wd->group->radios, obj);
 386         wd->group = calloc(1, sizeof(Group));
 387         wd->group->radios = eina_list_append(wd->group->radios, obj);
 388      }
 389    else if (wd->group == wd2->group) return;
 390    else
 391      {
 392         wd->group->radios = eina_list_remove(wd->group->radios, obj);
 393         if (!wd->group->radios) free(wd->group);
 394         wd->group = wd2->group;
 395         wd->group->radios = eina_list_append(wd->group->radios, obj);
 396      }
 397    if (wd->value == wd->group->value) _state_set(obj, 1);
 398    else _state_set(obj, 0);
 399 }
 400
 401 EAPI void
 402 elm_radio_state_value_set(Evas_Object *obj, int value)
 403 {
 404    ELM_CHECK_WIDTYPE(obj, widtype);
 405    Widget_Data *wd = elm_widget_data_get(obj);
 406    if (!wd) return;
 407    wd->value = value;
 408    if (wd->value == wd->group->value) _state_set(obj, 1);
 409    else _state_set(obj, 0);
 410 }
 411
 412 EAPI int
 413 elm_radio_state_value_get(const Evas_Object *obj)
 414 {
 415    ELM_CHECK_WIDTYPE(obj, widtype) 0;
 416    Widget_Data *wd = elm_widget_data_get(obj);
 417    if (!wd) return 0;
 418    return wd->value;
 419 }
 420
 421 EAPI void
 422 elm_radio_value_set(Evas_Object *obj, int value)
 423 {
 424    ELM_CHECK_WIDTYPE(obj, widtype);
 425    Widget_Data *wd = elm_widget_data_get(obj);
 426    if (!wd) return;
 427    if (value == wd->group->value) return;
 428    wd->group->value = value;
 429    if (wd->group->valuep) *(wd->group->valuep) = wd->group->value;
 430    _state_set_all(wd);
 431 }
 432
 433 EAPI int
 434 elm_radio_value_get(const Evas_Object *obj)
 435 {
 436    ELM_CHECK_WIDTYPE(obj, widtype) 0;
 437    Widget_Data *wd = elm_widget_data_get(obj);
 438    if (!wd) return 0;
 439    return wd->group->value;
 440 }
 441
 442 EAPI void
 443 elm_radio_value_pointer_set(Evas_Object *obj, int *valuep)
 444 {
 445    ELM_CHECK_WIDTYPE(obj, widtype);
 446    Widget_Data *wd = elm_widget_data_get(obj);
 447    if (!wd) return;
 448    if (valuep)
 449      {
 450         wd->group->valuep = valuep;
 451         if (*(wd->group->valuep) != wd->group->value)
 452           {
 453              wd->group->value = *(wd->group->valuep);
 454              _state_set_all(wd);
 455           }
 456      }
 457    else
 458      {
 459         wd->group->valuep = NULL;
 460      }
 461 }