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_escaped_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    if ((_elm_config->access_mode == ELM_ACCESS_MODE_OFF) ||
 225        (_elm_access_2nd_click_timeout(obj)))
 226      {
 227         wd->group->value = wd->value;
 228         if (wd->group->valuep) *(wd->group->valuep) = wd->group->value;
 229         _state_set_all(wd);
 230         if (_elm_config->access_mode != ELM_ACCESS_MODE_OFF)
 231           _elm_access_say(E_("State: On"));
 232         evas_object_smart_callback_call(obj, SIG_CHANGED, NULL);
 233      }
 234 }
 235
 236 static void
 237 _activate_hook(Evas_Object *obj)
 238 {
 239    _activate(obj);
 240 }
 241
 242 static void
 243 _signal_radio_on(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 244 {
 245    _activate(data);
 246 }
 247
 248 static void
 249 _elm_radio_label_set(Evas_Object *obj, const char *item, const char *label)
 250 {
 251    ELM_CHECK_WIDTYPE(obj, widtype);
 252    Widget_Data *wd = elm_widget_data_get(obj);
 253    if (item && strcmp(item, "default")) return;
 254    if (!wd) return;
 255    eina_stringshare_replace(&wd->label, label);
 256    if (label)
 257      {
 258         edje_object_signal_emit(wd->radio, "elm,state,text,visible", "elm");
 259         edje_object_message_signal_process(wd->radio);
 260      }
 261    else
 262      {
 263         edje_object_signal_emit(wd->radio, "elm,state,text,hidden", "elm");
 264         edje_object_message_signal_process(wd->radio);
 265      }
 266    edje_object_part_text_escaped_set(wd->radio, "elm.text", label);
 267    _sizing_eval(obj);
 268 }
 269
 270 static const char *
 271 _elm_radio_label_get(const Evas_Object *obj, const char *item)
 272 {
 273    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 274    Widget_Data *wd = elm_widget_data_get(obj);
 275    if (item && strcmp(item, "default")) return NULL;
 276    if (!wd) return NULL;
 277    return wd->label;
 278 }
 279
 280 static char *
 281 _access_info_cb(void *data __UNUSED__, Evas_Object *obj, Elm_Widget_Item *item __UNUSED__)
 282 {
 283    const char *txt = elm_widget_access_info_get(obj);
 284    if (!txt) txt = _elm_radio_label_get(obj, NULL);
 285    if (txt) return strdup(txt);
 286    return NULL;
 287 }
 288
 289 static char *
 290 _access_state_cb(void *data __UNUSED__, Evas_Object *obj, Elm_Widget_Item *item __UNUSED__)
 291 {
 292    Widget_Data *wd = elm_widget_data_get(obj);
 293    if (!wd) return NULL;
 294    if (elm_widget_disabled_get(obj))
 295      return strdup(E_("State: Disabled"));
 296    if (wd->state)
 297      return strdup(E_("State: On"));
 298    return strdup(E_("State: Off"));
 299 }
 300
 301 static void
 302 _content_set_hook(Evas_Object *obj, const char *part, Evas_Object *content)
 303 {
 304    ELM_CHECK_WIDTYPE(obj, widtype);
 305    Widget_Data *wd;
 306
 307    if (part && strcmp(part, "icon")) return;
 308    wd = elm_widget_data_get(obj);
 309    if (!wd) return;
 310    if (wd->icon == content) return;
 311    if (wd->icon) evas_object_del(wd->icon);
 312    wd->icon = content;
 313    if (content)
 314      {
 315         elm_widget_sub_object_add(obj, content);
 316         evas_object_event_callback_add(content,
 317                                        EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 318                                        _changed_size_hints, obj);
 319         edje_object_part_swallow(wd->radio, "elm.swallow.content", content);
 320         edje_object_signal_emit(wd->radio, "elm,state,icon,visible", "elm");
 321         edje_object_message_signal_process(wd->radio);
 322      }
 323    _sizing_eval(obj);
 324 }
 325
 326 static Evas_Object *
 327 _content_get_hook(const Evas_Object *obj, const char *part)
 328 {
 329    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 330    Widget_Data *wd;
 331
 332    if (part && strcmp(part, "icon")) return NULL;
 333    wd = elm_widget_data_get(obj);
 334    if (!wd) return NULL;
 335    return wd->icon;
 336 }
 337
 338 static Evas_Object *
 339 _content_unset_hook(Evas_Object *obj, const char *part)
 340 {
 341    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 342    Widget_Data *wd;
 343    Evas_Object *icon;
 344    if (part && strcmp(part, "icon")) return NULL;
 345    wd = elm_widget_data_get(obj);
 346    if (!wd) return NULL;
 347    if (!wd->icon) return NULL;
 348    icon = wd->icon;
 349    elm_widget_sub_object_del(obj, wd->icon);
 350    evas_object_event_callback_del_full(wd->icon, EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 351                                        _changed_size_hints, obj);
 352    edje_object_part_unswallow(wd->radio, wd->icon);
 353    wd->icon = NULL;
 354    return icon;
 355 }
 356
 357 EAPI Evas_Object *
 358 elm_radio_add(Evas_Object *parent)
 359 {
 360    Evas_Object *obj;
 361    Evas *e;
 362    Widget_Data *wd;
 363
 364    ELM_WIDGET_STANDARD_SETUP(wd, Widget_Data, parent, e, obj, NULL);
 365
 366    ELM_SET_WIDTYPE(widtype, "radio");
 367    elm_widget_type_set(obj, "radio");
 368    elm_widget_sub_object_add(parent, obj);
 369    elm_widget_on_focus_hook_set(obj, _on_focus_hook, NULL);
 370    elm_widget_data_set(obj, wd);
 371    elm_widget_del_hook_set(obj, _del_hook);
 372    elm_widget_theme_hook_set(obj, _theme_hook);
 373    elm_widget_disable_hook_set(obj, _disable_hook);
 374    elm_widget_can_focus_set(obj, EINA_TRUE);
 375    elm_widget_activate_hook_set(obj, _activate_hook);
 376    elm_widget_event_hook_set(obj, _event_hook);
 377    elm_widget_text_set_hook_set(obj, _elm_radio_label_set);
 378    elm_widget_text_get_hook_set(obj, _elm_radio_label_get);
 379    elm_widget_content_set_hook_set(obj, _content_set_hook);
 380    elm_widget_content_get_hook_set(obj, _content_get_hook);
 381    elm_widget_content_unset_hook_set(obj, _content_unset_hook);
 382
 383    wd->radio = edje_object_add(e);
 384    _elm_theme_object_set(obj, wd->radio, "radio", "base", "default");
 385    edje_object_signal_callback_add(wd->radio, "elm,action,radio,on", "", _signal_radio_on, obj);
 386    edje_object_signal_callback_add(wd->radio, "elm,action,radio,toggle", "", _signal_radio_on, obj);
 387    elm_widget_resize_object_set(obj, wd->radio);
 388
 389    evas_object_smart_callback_add(obj, "sub-object-del", _sub_del, obj);
 390
 391    wd->group = calloc(1, sizeof(Group));
 392    wd->group->radios = eina_list_append(wd->group->radios, obj);
 393    wd->state = 0;
 394
 395    _mirrored_set(obj, elm_widget_mirrored_get(obj));
 396    _sizing_eval(obj);
 397
 398    // TODO: convert Elementary to subclassing of Evas_Smart_Class
 399    // TODO: and save some bytes, making descriptions per-class and not instance!
 400    evas_object_smart_callbacks_descriptions_set(obj, _signals);
 401
 402    _elm_access_object_register(obj, wd->radio);
 403    _elm_access_text_set(_elm_access_object_get(obj),
 404                         ELM_ACCESS_TYPE, E_("Radio"));
 405    _elm_access_callback_set(_elm_access_object_get(obj),
 406                             ELM_ACCESS_INFO, _access_info_cb, obj);
 407    _elm_access_callback_set(_elm_access_object_get(obj),
 408                             ELM_ACCESS_STATE, _access_state_cb, obj);
 409
 410    return obj;
 411 }
 412
 413 EAPI void
 414 elm_radio_group_add(Evas_Object *obj, Evas_Object *group)
 415 {
 416    ELM_CHECK_WIDTYPE(obj, widtype);
 417    Widget_Data *wd = elm_widget_data_get(obj);
 418    Widget_Data *wd2 = elm_widget_data_get(group);
 419    if (!wd) return;
 420    if (!wd2)
 421      {
 422         if (eina_list_count(wd->group->radios) == 1)
 423           return;
 424         wd->group->radios = eina_list_remove(wd->group->radios, obj);
 425         wd->group = calloc(1, sizeof(Group));
 426         wd->group->radios = eina_list_append(wd->group->radios, obj);
 427      }
 428    else if (wd->group == wd2->group) return;
 429    else
 430      {
 431         wd->group->radios = eina_list_remove(wd->group->radios, obj);
 432         if (!wd->group->radios) free(wd->group);
 433         wd->group = wd2->group;
 434         wd->group->radios = eina_list_append(wd->group->radios, obj);
 435      }
 436    if (wd->value == wd->group->value) _state_set(obj, 1);
 437    else _state_set(obj, 0);
 438 }
 439
 440 EAPI void
 441 elm_radio_state_value_set(Evas_Object *obj, int value)
 442 {
 443    ELM_CHECK_WIDTYPE(obj, widtype);
 444    Widget_Data *wd = elm_widget_data_get(obj);
 445    if (!wd) return;
 446    wd->value = value;
 447    if (wd->value == wd->group->value) _state_set(obj, 1);
 448    else _state_set(obj, 0);
 449 }
 450
 451 EAPI int
 452 elm_radio_state_value_get(const Evas_Object *obj)
 453 {
 454    ELM_CHECK_WIDTYPE(obj, widtype) 0;
 455    Widget_Data *wd = elm_widget_data_get(obj);
 456    if (!wd) return 0;
 457    return wd->value;
 458 }
 459
 460 EAPI void
 461 elm_radio_value_set(Evas_Object *obj, int value)
 462 {
 463    ELM_CHECK_WIDTYPE(obj, widtype);
 464    Widget_Data *wd = elm_widget_data_get(obj);
 465    if (!wd) return;
 466    if (value == wd->group->value) return;
 467    wd->group->value = value;
 468    if (wd->group->valuep) *(wd->group->valuep) = wd->group->value;
 469    _state_set_all(wd);
 470 }
 471
 472 EAPI int
 473 elm_radio_value_get(const Evas_Object *obj)
 474 {
 475    ELM_CHECK_WIDTYPE(obj, widtype) 0;
 476    Widget_Data *wd = elm_widget_data_get(obj);
 477    if (!wd) return 0;
 478    return wd->group->value;
 479 }
 480
 481 EAPI void
 482 elm_radio_value_pointer_set(Evas_Object *obj, int *valuep)
 483 {
 484    ELM_CHECK_WIDTYPE(obj, widtype);
 485    Widget_Data *wd = elm_widget_data_get(obj);
 486    if (!wd) return;
 487    if (valuep)
 488      {
 489         wd->group->valuep = valuep;
 490         if (*(wd->group->valuep) != wd->group->value)
 491           {
 492              wd->group->value = *(wd->group->valuep);
 493              _state_set_all(wd);
 494           }
 495      }
 496    else
 497      {
 498         wd->group->valuep = NULL;
 499      }
 500 }
 501
 502 EAPI Evas_Object *
 503 elm_radio_selected_object_get(Evas_Object *obj)
 504 {
 505    Eina_List *l;
 506    Evas_Object *child;
 507    Widget_Data *wd2;
 508
 509    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 510    Widget_Data *wd = elm_widget_data_get(obj);
 511    if (!wd) return NULL;
 512
 513    EINA_LIST_FOREACH(wd->group->radios, l, child)
 514      {
 515         wd2  = elm_widget_data_get(child);
 516         if (wd2->value == wd->group->value)
 517            return child;
 518      }
 519    return NULL;
 520 }