src/lib/elm_slider.c

   1 #include <Elementary.h>
   2 #include "elm_priv.h"
   3
   4 typedef struct _Widget_Data Widget_Data;
   5
   6 struct _Widget_Data
   7 {
   8    Evas_Object *slider;
   9    Evas_Object *icon;
  10    Evas_Object *end;
  11    Evas_Object *spacer;
  12
  13    Ecore_Timer *delay;
  14
  15    Eina_Hash  *labels;
  16    const char *units;
  17    const char *indicator;
  18
  19    char *(*indicator_format_func)(double val);
  20    void (*indicator_format_free)(char *str);
  21
  22    char *(*units_format_func)(double val);
  23    void (*units_format_free)(char *str);
  24
  25    double val, val_min, val_max, val2;
  26    Evas_Coord size;
  27    Evas_Coord downx, downy;
  28
  29    Eina_Bool horizontal : 1;
  30    Eina_Bool inverted : 1;
  31    Eina_Bool indicator_show : 1;
  32    Eina_Bool spacer_down : 1;
  33    Eina_Bool frozen : 1;
  34 };
  35
  36 #define ELM_SLIDER_INVERTED_FACTOR (-1.0)
  37
  38 static const char *widtype = NULL;
  39 static void _del_hook(Evas_Object *obj);
  40 static void _mirrored_set(Evas_Object *obj, Eina_Bool rtl);
  41 static void _theme_hook(Evas_Object *obj);
  42 static void _disable_hook(Evas_Object *obj);
  43 static void _sizing_eval(Evas_Object *obj);
  44 static void _changed_size_hints(void *data, Evas *e, Evas_Object *obj, void *event_info);
  45 static void _sub_del(void *data, Evas_Object *obj, void *event_info);
  46 static void _units_set(Evas_Object *obj);
  47 static void _val_set(Evas_Object *obj);
  48 static void _indicator_set(Evas_Object *obj);
  49 static void _on_focus_hook(void *data, Evas_Object *obj);
  50 static void _drag_up(void *data, Evas_Object *obj,
  51                     const char *emission, const char *source);
  52 static void _drag_down(void *data, Evas_Object *obj,
  53                     const char *emission, const char *source);
  54 static Eina_Bool _event_hook(Evas_Object *obj, Evas_Object *src,
  55                              Evas_Callback_Type type, void *event_info);
  56 static void _spacer_down_cb(void *data, Evas * e, Evas_Object * obj, void *event_info);
  57 static void _spacer_move_cb(void *data, Evas * e, Evas_Object * obj, void *event_info);
  58 static void _spacer_up_cb(void *data, Evas * e, Evas_Object * obj, void *event_info);
  59
  60 static const char SIG_CHANGED[] = "changed";
  61 static const char SIG_DELAY_CHANGED[] = "delay,changed";
  62 static const char SIG_DRAG_START[] = "slider,drag,start";
  63 static const char SIG_DRAG_STOP[] = "slider,drag,stop";
  64 static const Evas_Smart_Cb_Description _signals[] = {
  65   {SIG_CHANGED, ""},
  66   {SIG_DELAY_CHANGED, ""},
  67   {SIG_DRAG_START, ""},
  68   {SIG_DRAG_STOP, ""},
  69   {NULL, NULL}
  70 };
  71
  72 static Eina_Bool
  73 _event_hook(Evas_Object *obj, Evas_Object *src __UNUSED__, Evas_Callback_Type type, void *event_info)
  74 {
  75    Evas_Event_Mouse_Wheel *mev;
  76    Evas_Event_Key_Down *ev;
  77    Widget_Data *wd;
  78
  79    wd = elm_widget_data_get(obj);
  80    if (!wd) return EINA_FALSE;
  81
  82    if (type == EVAS_CALLBACK_KEY_DOWN) goto key_down;
  83    else if (type != EVAS_CALLBACK_MOUSE_WHEEL) return EINA_FALSE;
  84
  85    mev = event_info;
  86    if (mev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return EINA_FALSE;
  87    if (elm_widget_disabled_get(obj)) return EINA_FALSE;
  88
  89    if (mev->z < 0) _drag_up(obj, NULL, NULL, NULL);
  90    else _drag_down(obj, NULL, NULL, NULL);
  91    mev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
  92    return EINA_TRUE;
  93
  94   key_down:
  95    ev = event_info;
  96    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return EINA_FALSE;
  97    if (elm_widget_disabled_get(obj)) return EINA_FALSE;
  98    if ((!strcmp(ev->keyname, "Left"))
  99        || (!strcmp(ev->keyname, "KP_Left")))
 100      {
 101         if (!wd->horizontal) return EINA_FALSE;
 102         if (!wd->inverted) _drag_down(obj, NULL, NULL, NULL);
 103         else _drag_up(obj, NULL, NULL, NULL);
 104         ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
 105         return EINA_TRUE;
 106      }
 107    else if ((!strcmp(ev->keyname, "Right"))
 108             || (!strcmp(ev->keyname, "KP_Right")))
 109      {
 110         if (!wd->horizontal) return EINA_FALSE;
 111         if (!wd->inverted) _drag_up(obj, NULL, NULL, NULL);
 112         else _drag_down(obj, NULL, NULL, NULL);
 113         ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
 114         return EINA_TRUE;
 115      }
 116    else if ((!strcmp(ev->keyname, "Up")) || (!strcmp(ev->keyname, "KP_Up")))
 117      {
 118         if (wd->horizontal) return EINA_FALSE;
 119         if (wd->inverted) _drag_up(obj, NULL, NULL, NULL);
 120         else _drag_down(obj, NULL, NULL, NULL);
 121         ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
 122         return EINA_TRUE;
 123      }
 124    else if ((!strcmp(ev->keyname, "Down")) || (!strcmp(ev->keyname, "KP_Down")))
 125      {
 126         if (wd->horizontal) return EINA_FALSE;
 127         if (wd->inverted) _drag_down(obj, NULL, NULL, NULL);
 128         else _drag_up(obj, NULL, NULL, NULL);
 129         ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
 130         return EINA_TRUE;
 131      }
 132    else return EINA_FALSE;
 133 }
 134
 135 static void
 136 _del_hook(Evas_Object *obj)
 137 {
 138    Widget_Data *wd = elm_widget_data_get(obj);
 139    if (!wd) return;
 140    if (wd->labels) eina_hash_free(wd->labels);
 141    if (wd->indicator) eina_stringshare_del(wd->units);
 142    if (wd->delay) ecore_timer_del(wd->delay);
 143    free(wd);
 144 }
 145
 146 static void
 147 _on_focus_hook(void *data __UNUSED__, Evas_Object *obj)
 148 {
 149    Widget_Data *wd = elm_widget_data_get(obj);
 150    if (!wd) return;
 151    if (elm_widget_focus_get(obj))
 152      {
 153         edje_object_signal_emit(wd->slider, "elm,action,focus", "elm");
 154         evas_object_focus_set(wd->slider, EINA_TRUE);
 155      }
 156    else
 157      {
 158         edje_object_signal_emit(wd->slider, "elm,action,unfocus", "elm");
 159         evas_object_focus_set(wd->slider, EINA_FALSE);
 160      }
 161 }
 162
 163 static void
 164 _mirrored_set(Evas_Object *obj, Eina_Bool rtl)
 165 {
 166    Widget_Data *wd = elm_widget_data_get(obj);
 167    if (!wd) return;
 168    edje_object_mirrored_set(wd->slider, rtl);
 169 }
 170
 171 static Eina_Bool
 172 _labels_foreach_text_set(const Eina_Hash *hash __UNUSED__, const void *key, void *data, void *fdata)
 173 {
 174   Widget_Data *wd = fdata;
 175
 176   edje_object_part_text_set(wd->slider, key, data);
 177
 178   return 1;
 179 }
 180
 181 static void
 182 _theme_hook(Evas_Object *obj)
 183 {
 184    Widget_Data *wd = elm_widget_data_get(obj);
 185    if (!wd) return;
 186    _elm_widget_mirrored_reload(obj);
 187    _mirrored_set(obj, elm_widget_mirrored_get(obj));
 188    if (wd->horizontal)
 189      _elm_theme_object_set(obj, wd->slider, "slider", "horizontal", elm_widget_style_get(obj));
 190    else
 191      _elm_theme_object_set(obj, wd->slider, "slider", "vertical", elm_widget_style_get(obj));
 192    if (wd->icon)
 193      {
 194         edje_object_part_swallow(wd->slider, "elm.swallow.content", wd->icon);
 195         edje_object_signal_emit(wd->slider, "elm,state,icon,visible", "elm");
 196      }
 197    if (wd->end)
 198      edje_object_signal_emit(wd->slider, "elm,state,end,visible", "elm");
 199    else
 200      edje_object_signal_emit(wd->slider, "elm,state,end,hidden", "elm");
 201    if (wd->labels)
 202      {
 203         eina_hash_foreach(wd->labels, _labels_foreach_text_set, wd);
 204         edje_object_signal_emit(wd->slider, "elm,state,text,visible", "elm");
 205      }
 206
 207    if (wd->units)
 208      edje_object_signal_emit(wd->slider, "elm,state,units,visible", "elm");
 209
 210    if (wd->horizontal)
 211      evas_object_size_hint_min_set(wd->spacer, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale, 1);
 212    else
 213      evas_object_size_hint_min_set(wd->spacer, 1, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale);
 214
 215    if (wd->inverted)
 216      edje_object_signal_emit(wd->slider, "elm,state,inverted,on", "elm");
 217
 218    edje_object_part_swallow(wd->slider, "elm.swallow.bar", wd->spacer);
 219    _units_set(obj);
 220    _indicator_set(obj);
 221    edje_object_message_signal_process(wd->slider);
 222    edje_object_scale_set(wd->slider, elm_widget_scale_get(obj) * _elm_config->scale);
 223    _val_set(obj);
 224    _sizing_eval(obj);
 225 }
 226
 227 static void
 228 _disable_hook(Evas_Object *obj)
 229 {
 230    Widget_Data *wd = elm_widget_data_get(obj);
 231    if (!wd) return;
 232    if (elm_widget_disabled_get(obj))
 233      edje_object_signal_emit(wd->slider, "elm,state,disabled", "elm");
 234    else
 235      edje_object_signal_emit(wd->slider, "elm,state,enabled", "elm");
 236 }
 237
 238 static void
 239 _sizing_eval(Evas_Object *obj)
 240 {
 241    Widget_Data *wd = elm_widget_data_get(obj);
 242    Evas_Coord minw = -1, minh = -1, maxw = -1, maxh = -1;
 243    if (!wd) return;
 244    elm_coords_finger_size_adjust(1, &minw, 1, &minh);
 245    edje_object_size_min_restricted_calc(wd->slider, &minw, &minh, minw, minh);
 246    elm_coords_finger_size_adjust(1, &minw, 1, &minh);
 247    evas_object_size_hint_min_set(obj, minw, minh);
 248    evas_object_size_hint_max_set(obj, maxw, maxh);
 249 }
 250
 251 static void
 252 _changed_size_hints(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
 253 {
 254    Widget_Data *wd = elm_widget_data_get(data);
 255    if (!wd) return;
 256    if ((obj != wd->icon) && (obj != wd->end)) return;
 257    _sizing_eval(data);
 258 }
 259
 260 static void
 261 _sub_del(void *data __UNUSED__, Evas_Object *obj, void *event_info)
 262 {
 263    Widget_Data *wd = elm_widget_data_get(obj);
 264    Evas_Object *sub = event_info;
 265    if (!wd) return;
 266    if (sub == wd->icon)
 267      {
 268         edje_object_signal_emit(wd->slider, "elm,state,icon,hidden", "elm");
 269         evas_object_event_callback_del_full
 270            (sub, EVAS_CALLBACK_CHANGED_SIZE_HINTS, _changed_size_hints, obj);
 271         wd->icon = NULL;
 272         edje_object_message_signal_process(wd->slider);
 273         _sizing_eval(obj);
 274      }
 275    if (sub == wd->end)
 276      {
 277         edje_object_signal_emit(wd->slider, "elm,state,end,hidden", "elm");
 278         evas_object_event_callback_del_full(sub,
 279                                             EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 280                                             _changed_size_hints, obj);
 281         wd->end = NULL;
 282         edje_object_message_signal_process(wd->slider);
 283         _sizing_eval(obj);
 284      }
 285 }
 286
 287 static Eina_Bool
 288 _delay_change(void *data)
 289 {
 290    Widget_Data *wd = elm_widget_data_get(data);
 291    if (!wd) return ECORE_CALLBACK_CANCEL;
 292    wd->delay = NULL;
 293    evas_object_smart_callback_call(data, SIG_DELAY_CHANGED, NULL);
 294    return ECORE_CALLBACK_CANCEL;
 295 }
 296
 297 static void
 298 _val_fetch(Evas_Object *obj)
 299 {
 300    Eina_Bool rtl;
 301    Widget_Data *wd = elm_widget_data_get(obj);
 302    double posx = 0.0, posy = 0.0, pos = 0.0, val;
 303    if (!wd) return;
 304    edje_object_part_drag_value_get(wd->slider, "elm.dragable.slider",
 305                                    &posx, &posy);
 306    if (wd->horizontal) pos = posx;
 307    else pos = posy;
 308
 309    rtl = elm_widget_mirrored_get(obj);
 310    if ((!rtl && wd->inverted) || (rtl &&
 311                                   ((!wd->horizontal && wd->inverted) ||
 312                                    (wd->horizontal && !wd->inverted)))) pos = 1.0 - pos;
 313    val = (pos * (wd->val_max - wd->val_min)) + wd->val_min;
 314    if (val != wd->val)
 315      {
 316         wd->val = val;
 317         evas_object_smart_callback_call(obj, SIG_CHANGED, NULL);
 318         if (wd->delay) ecore_timer_del(wd->delay);
 319         wd->delay = ecore_timer_add(0.2, _delay_change, obj);
 320      }
 321 }
 322
 323 static void
 324 _val_set(Evas_Object *obj)
 325 {
 326    Eina_Bool rtl;
 327    Widget_Data *wd = elm_widget_data_get(obj);
 328    double pos;
 329    if (!wd) return;
 330    if (wd->val_max > wd->val_min)
 331      pos = (wd->val - wd->val_min) / (wd->val_max - wd->val_min);
 332    else
 333      pos = 0.0;
 334    if (pos < 0.0) pos = 0.0;
 335    else if (pos > 1.0) pos = 1.0;
 336
 337    rtl = elm_widget_mirrored_get(obj);
 338    if ((!rtl && wd->inverted) || (rtl &&
 339                                   ((!wd->horizontal && wd->inverted) ||
 340                                    (wd->horizontal && !wd->inverted)))) pos = 1.0 - pos;
 341    edje_object_part_drag_value_set(wd->slider, "elm.dragable.slider", pos, pos);
 342 }
 343
 344 static void
 345 _units_set(Evas_Object *obj)
 346 {
 347    Widget_Data *wd = elm_widget_data_get(obj);
 348    if (!wd) return;
 349    if (wd->units_format_func)
 350      {
 351         char *buf;
 352         buf = wd->units_format_func(wd->val);
 353         edje_object_part_text_set(wd->slider, "elm.units", buf);
 354         if (wd->units_format_free) wd->units_format_free(buf);
 355      }
 356    else if (wd->units)
 357      {
 358         char buf[1024];
 359
 360         snprintf(buf, sizeof(buf), wd->units, wd->val);
 361         edje_object_part_text_set(wd->slider, "elm.units", buf);
 362      }
 363    else
 364      edje_object_part_text_set(wd->slider, "elm.units", NULL);
 365 }
 366
 367 static void
 368 _indicator_set(Evas_Object *obj)
 369 {
 370    Widget_Data *wd = elm_widget_data_get(obj);
 371    if (!wd) return;
 372    if (wd->indicator_format_func)
 373      {
 374         char *buf;
 375         buf = wd->indicator_format_func(wd->val);
 376         edje_object_part_text_set(wd->slider, "elm.dragable.slider:elm.indicator", buf);
 377         if (wd->indicator_format_free) wd->indicator_format_free(buf);
 378      }
 379    else if (wd->indicator)
 380      {
 381         char buf[1024];
 382         snprintf(buf, sizeof(buf), wd->indicator, wd->val);
 383         edje_object_part_text_set(wd->slider, "elm.dragable.slider:elm.indicator", buf);
 384      }
 385    else
 386      edje_object_part_text_set(wd->slider, "elm.dragable.slider:elm.indicator", NULL);
 387 }
 388
 389 static void
 390 _drag(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 391 {
 392    _val_fetch(data);
 393    _units_set(data);
 394    _indicator_set(data);
 395 }
 396
 397 static void
 398 _drag_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 399 {
 400    _val_fetch(data);
 401    evas_object_smart_callback_call(data, SIG_DRAG_START, NULL);
 402    _units_set(data);
 403    _indicator_set(data);
 404    elm_widget_scroll_freeze_push(data);
 405 }
 406
 407 static void
 408 _drag_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 409 {
 410    _val_fetch(data);
 411    evas_object_smart_callback_call(data, SIG_DRAG_STOP, NULL);
 412    _units_set(data);
 413    _indicator_set(data);
 414    elm_widget_scroll_freeze_pop(data);
 415 }
 416
 417 static void
 418 _drag_step(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 419 {
 420    _val_fetch(data);
 421    _units_set(data);
 422    _indicator_set(data);
 423 }
 424
 425 static void
 426 _drag_up(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 427 {
 428    double step;
 429    Widget_Data *wd;
 430
 431    wd = elm_widget_data_get(data);
 432    step = 0.05;
 433
 434    if (wd->inverted) step *= ELM_SLIDER_INVERTED_FACTOR;
 435
 436    edje_object_part_drag_step(wd->slider, "elm.dragable.slider", step, step);
 437 }
 438
 439 static void
 440 _drag_down(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
 441 {
 442    double step;
 443    Widget_Data *wd;
 444
 445    wd = elm_widget_data_get(data);
 446    step = -0.05;
 447
 448    if (wd->inverted) step *= ELM_SLIDER_INVERTED_FACTOR;
 449
 450    edje_object_part_drag_step(wd->slider, "elm.dragable.slider", step, step);
 451 }
 452
 453 static void
 454 _spacer_down_cb(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
 455 {
 456    Widget_Data *wd = elm_widget_data_get(data);
 457    Evas_Event_Mouse_Down *ev = event_info;
 458    Evas_Coord x, y, w, h;
 459    double button_x = 0.0, button_y = 0.0;
 460
 461    wd->spacer_down = EINA_TRUE;
 462    wd->val2 = wd->val;
 463    evas_object_geometry_get(wd->spacer, &x, &y, &w, &h);
 464    wd->downx = ev->canvas.x - x;
 465    wd->downy = ev->canvas.y - y;
 466    if (wd->horizontal)
 467      {
 468         button_x = ((double)ev->canvas.x - (double)x) / (double)w;
 469         if (button_x > 1) button_x = 1;
 470         if (button_x < 0) button_x = 0;
 471      }
 472    else
 473      {
 474         button_y = ((double)ev->canvas.y - (double)y) / (double)h;
 475         if (button_y > 1) button_y = 1;
 476         if (button_y < 0) button_y = 0;
 477      }
 478    edje_object_part_drag_value_set(wd->slider, "elm.dragable.slider", button_x, button_y);
 479    _val_fetch(data);
 480    evas_object_smart_callback_call(data, SIG_DRAG_START, NULL);
 481    _units_set(data);
 482    _indicator_set(data);
 483    edje_object_signal_emit(wd->slider, "elm,state,indicator,show", "elm");
 484 }
 485
 486 static void
 487 _spacer_move_cb(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
 488 {
 489    Widget_Data *wd = elm_widget_data_get(data);
 490    Evas_Event_Mouse_Move *ev = event_info;
 491    Evas_Coord x, y, w, h;
 492    double button_x = 0.0, button_y = 0.0;
 493
 494    if  (wd->spacer_down)
 495      {
 496         Evas_Coord d = 0;
 497
 498         evas_object_geometry_get(wd->spacer, &x, &y, &w, &h);
 499         if (wd->horizontal) d = abs(ev->cur.canvas.x - x - wd->downx);
 500         else d = abs(ev->cur.canvas.y - y - wd->downy);
 501         if (d > (_elm_config->thumbscroll_threshold - 1))
 502           {
 503              if (!wd->frozen)
 504                {
 505                   elm_widget_scroll_freeze_push(data);
 506                   wd->frozen = 1;
 507                }
 508              ev->event_flags &= ~EVAS_EVENT_FLAG_ON_HOLD;
 509           }
 510
 511         if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD)
 512           {
 513              if (wd->spacer_down) wd->spacer_down = EINA_FALSE;
 514              _val_fetch(data);
 515              evas_object_smart_callback_call(data, SIG_DRAG_STOP, NULL);
 516              _units_set(data);
 517              _indicator_set(data);
 518              if (wd->frozen)
 519                {
 520                   elm_widget_scroll_freeze_pop(data);
 521                   wd->frozen = 0;
 522                }
 523              edje_object_signal_emit(wd->slider, "elm,state,indicator,hide", "elm");
 524              elm_slider_value_set(data, wd->val2);
 525              return;
 526           }
 527         if (wd->horizontal)
 528           {
 529              button_x = ((double)ev->cur.canvas.x - (double)x) / (double)w;
 530              if (button_x > 1) button_x = 1;
 531              if (button_x < 0) button_x = 0;
 532           }
 533         else
 534           {
 535              button_y = ((double)ev->cur.canvas.y - (double)y) / (double)h;
 536              if (button_y > 1) button_y = 1;
 537              if (button_y < 0) button_y = 0;
 538           }
 539         edje_object_part_drag_value_set(wd->slider, "elm.dragable.slider", button_x, button_y);
 540         _val_fetch(data);
 541         _units_set(data);
 542         _indicator_set(data);
 543      }
 544 }
 545
 546 static void
 547 _spacer_up_cb(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
 548 {
 549    Widget_Data *wd = elm_widget_data_get(data);
 550
 551    if (!wd->spacer_down) return;
 552    if (wd->spacer_down) wd->spacer_down = EINA_FALSE;
 553    _val_fetch(data);
 554    evas_object_smart_callback_call(data, SIG_DRAG_STOP, NULL);
 555    _units_set(data);
 556    _indicator_set(data);
 557    if (wd->frozen)
 558      {
 559         elm_widget_scroll_freeze_pop(data);
 560         wd->frozen = 0;
 561      }
 562    edje_object_signal_emit(wd->slider, "elm,state,indicator,hide", "elm");
 563 }
 564
 565 static void
 566 _elm_slider_label_set(Evas_Object *obj, const char *part, const char *label)
 567 {
 568    ELM_CHECK_WIDTYPE(obj, widtype);
 569    Widget_Data *wd = elm_widget_data_get(obj);
 570    const char* default_part = "elm.text";
 571    const char* real_part;
 572
 573    if (!wd) return;
 574
 575    if (!part)
 576      real_part = default_part;
 577    else
 578      real_part = part;
 579
 580    if (wd->labels)
 581      {
 582        const char* old_label;
 583
 584        old_label = eina_hash_find(wd->labels, real_part);
 585        if (!old_label)
 586            eina_hash_add(wd->labels, real_part, eina_stringshare_add(label));
 587        else
 588          {
 589            eina_stringshare_ref(old_label);
 590            eina_hash_modify(wd->labels, real_part, eina_stringshare_add(label));
 591            eina_stringshare_del(old_label);
 592          }
 593      }
 594
 595    if (label)
 596      {
 597         edje_object_signal_emit(wd->slider, "elm,state,text,visible", "elm");
 598         edje_object_message_signal_process(wd->slider);
 599      }
 600    else
 601      {
 602         edje_object_signal_emit(wd->slider, "elm,state,text,hidden", "elm");
 603         edje_object_message_signal_process(wd->slider);
 604      }
 605
 606    edje_object_part_text_set(wd->slider, real_part, label);
 607    _sizing_eval(obj);
 608 }
 609
 610 static const char *
 611 _elm_slider_label_get(const Evas_Object *obj, const char *part)
 612 {
 613    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 614    Widget_Data *wd = elm_widget_data_get(obj);
 615    if (!wd) return NULL;
 616    if (!wd->labels) return NULL;
 617
 618    if (!part)
 619      return eina_hash_find(wd->labels, "elm.text");
 620    return eina_hash_find(wd->labels, part);
 621 }
 622
 623 static void
 624 _icon_set(Evas_Object *obj, Evas_Object *icon)
 625 {
 626    Widget_Data *wd = elm_widget_data_get(obj);
 627    if (!wd) return;
 628    if (wd->icon == icon) return;
 629    if (wd->icon) evas_object_del(wd->icon);
 630    wd->icon = icon;
 631    if (icon)
 632      {
 633         elm_widget_sub_object_add(obj, icon);
 634         evas_object_event_callback_add(icon, EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 635                                        _changed_size_hints, obj);
 636         edje_object_part_swallow(wd->slider, "elm.swallow.icon", icon);
 637         edje_object_signal_emit(wd->slider, "elm,state,icon,visible", "elm");
 638         edje_object_message_signal_process(wd->slider);
 639      }
 640    _sizing_eval(obj);
 641 }
 642
 643 static Evas_Object *
 644 _icon_unset(Evas_Object *obj)
 645 {
 646    Widget_Data *wd = elm_widget_data_get(obj);
 647    Evas_Object *ret = NULL;
 648    if (!wd) return NULL;
 649    if (wd->icon)
 650      {
 651         elm_widget_sub_object_del(obj, wd->icon);
 652         evas_object_event_callback_del_full(wd->icon,
 653                                             EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 654                                             _changed_size_hints, obj);
 655         ret = wd->icon;
 656         edje_object_part_unswallow(wd->slider, wd->icon);
 657         edje_object_signal_emit(wd->slider, "elm,state,icon,hidden", "elm");
 658         wd->icon = NULL;
 659         _sizing_eval(obj);
 660      }
 661    return ret;
 662 }
 663
 664 static void
 665 _end_set(Evas_Object *obj, Evas_Object *end)
 666 {
 667    Widget_Data *wd = elm_widget_data_get(obj);
 668    if (!wd) return;
 669    if (wd->end == end) return;
 670    if (wd->end) evas_object_del(wd->end);
 671    wd->end = end;
 672    if (end)
 673      {
 674         elm_widget_sub_object_add(obj, end);
 675         evas_object_event_callback_add(end, EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 676                                        _changed_size_hints, obj);
 677         edje_object_part_swallow(wd->slider, "elm.swallow.end", end);
 678         edje_object_signal_emit(wd->slider, "elm,state,end,visible", "elm");
 679         edje_object_message_signal_process(wd->slider);
 680      }
 681    _sizing_eval(obj);
 682 }
 683
 684 static Evas_Object *
 685 _end_unset(Evas_Object *obj)
 686 {
 687    Widget_Data *wd = elm_widget_data_get(obj);
 688    Evas_Object *ret = NULL;
 689    if (!wd) return NULL;
 690    if (wd->end)
 691      {
 692         elm_widget_sub_object_del(obj, wd->end);
 693         evas_object_event_callback_del_full(wd->end,
 694                                             EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 695                                             _changed_size_hints, obj);
 696         ret = wd->end;
 697         edje_object_part_unswallow(wd->slider, wd->end);
 698         edje_object_signal_emit(wd->slider, "elm,state,end,hidden", "elm");
 699         wd->end = NULL;
 700         _sizing_eval(obj);
 701      }
 702    return ret;
 703 }
 704
 705 static void
 706 _content_set_hook(Evas_Object *obj, const char *part, Evas_Object *content)
 707 {
 708    ELM_CHECK_WIDTYPE(obj, widtype);
 709    if (!part || !strcmp(part, "icon"))
 710      _icon_set(obj, content);
 711    else if (!strcmp(part, "end"))
 712      _end_set(obj, content);
 713 }
 714
 715 static Evas_Object *
 716 _content_get_hook(const Evas_Object *obj, const char *part)
 717 {
 718    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 719    Widget_Data *wd;
 720    wd = elm_widget_data_get(obj);
 721    if (!wd) return NULL;
 722    if (!part || !strcmp(part, "icon"))
 723      return wd->icon;
 724    else if (!strcmp(part, "end"))
 725      return wd->end;
 726    return NULL;
 727 }
 728
 729 static Evas_Object *
 730 _content_unset_hook(Evas_Object *obj, const char *part)
 731 {
 732    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 733    if (!part || !strcmp(part, "icon"))
 734      return _icon_unset(obj);
 735    else if (!strcmp(part, "end"))
 736      return _end_unset(obj);
 737    return NULL;
 738 }
 739
 740 static void
 741 _hash_labels_free_cb(void* label)
 742 {
 743   if (label)
 744     eina_stringshare_del(label);
 745 }
 746
 747 static void
 748 _min_max_set(Evas_Object *obj)
 749 {
 750    char *buf_min = NULL;
 751    char *buf_max = NULL;
 752
 753    Widget_Data *wd = elm_widget_data_get(obj);
 754    if (!wd) return;
 755    if (wd->units_format_func)
 756      {
 757         buf_min = wd->units_format_func(wd->val_min);
 758         buf_max = wd->units_format_func(wd->val_max);
 759      }
 760    else if (wd->units)
 761      {
 762         int length = strlen(wd->units);
 763
 764         buf_min = alloca(length + 128);
 765         buf_max = alloca(length + 128);
 766
 767         snprintf((char*) buf_min, length + 128, wd->units, wd->val_min);
 768         snprintf((char*) buf_max, length + 128, wd->units, wd->val_max);
 769      }
 770
 771    edje_object_part_text_set(wd->slider, "elm.units.min", buf_min);
 772    edje_object_part_text_set(wd->slider, "elm.units.max", buf_max);
 773
 774    if (wd->units_format_func && wd->units_format_free)
 775      {
 776         wd->units_format_free(buf_min);
 777         wd->units_format_free(buf_max);
 778      }
 779 }
 780
 781
 782 EAPI Evas_Object *
 783 elm_slider_add(Evas_Object *parent)
 784 {
 785    Evas_Object *obj;
 786    Evas *e;
 787    Widget_Data *wd;
 788
 789    ELM_WIDGET_STANDARD_SETUP(wd, Widget_Data, parent, e, obj, NULL);
 790
 791    ELM_SET_WIDTYPE(widtype, "slider");
 792    elm_widget_type_set(obj, "slider");
 793    elm_widget_sub_object_add(parent, obj);
 794    elm_widget_on_focus_hook_set(obj, _on_focus_hook, NULL);
 795    elm_widget_data_set(obj, wd);
 796    elm_widget_del_hook_set(obj, _del_hook);
 797    elm_widget_theme_hook_set(obj, _theme_hook);
 798    elm_widget_disable_hook_set(obj, _disable_hook);
 799    elm_widget_can_focus_set(obj, EINA_TRUE);
 800    elm_widget_event_hook_set(obj, _event_hook);
 801    elm_widget_text_set_hook_set(obj, _elm_slider_label_set);
 802    elm_widget_text_get_hook_set(obj, _elm_slider_label_get);
 803    elm_widget_content_set_hook_set(obj, _content_set_hook);
 804    elm_widget_content_get_hook_set(obj, _content_get_hook);
 805    elm_widget_content_unset_hook_set(obj, _content_unset_hook);
 806
 807    wd->horizontal = EINA_TRUE;
 808    wd->indicator_show = EINA_TRUE;
 809    wd->val = 0.0;
 810    wd->val_min = 0.0;
 811    wd->val_max = 1.0;
 812    wd->labels = eina_hash_string_superfast_new(_hash_labels_free_cb);
 813
 814    wd->slider = edje_object_add(e);
 815    _elm_theme_object_set(obj, wd->slider, "slider", "horizontal", "default");
 816    elm_widget_resize_object_set(obj, wd->slider);
 817    edje_object_signal_callback_add(wd->slider, "drag", "*", _drag, obj);
 818    edje_object_signal_callback_add(wd->slider, "drag,start", "*", _drag_start, obj);
 819    edje_object_signal_callback_add(wd->slider, "drag,stop", "*", _drag_stop, obj);
 820    edje_object_signal_callback_add(wd->slider, "drag,step", "*", _drag_step, obj);
 821    edje_object_signal_callback_add(wd->slider, "drag,page", "*", _drag_stop, obj);
 822    //   edje_object_signal_callback_add(wd->slider, "drag,set", "*", _drag_stop, obj);
 823    edje_object_part_drag_value_set(wd->slider, "elm.dragable.slider", 0.0, 0.0);
 824
 825    wd->spacer = evas_object_rectangle_add(e);
 826    evas_object_color_set(wd->spacer, 0, 0, 0, 0);
 827    evas_object_pass_events_set(wd->spacer, EINA_TRUE);
 828    elm_widget_sub_object_add(obj, wd->spacer);
 829    edje_object_part_swallow(wd->slider, "elm.swallow.bar", wd->spacer);
 830    evas_object_event_callback_add(wd->spacer, EVAS_CALLBACK_MOUSE_DOWN, _spacer_down_cb, obj);
 831    evas_object_event_callback_add(wd->spacer, EVAS_CALLBACK_MOUSE_MOVE, _spacer_move_cb, obj);
 832    evas_object_event_callback_add(wd->spacer, EVAS_CALLBACK_MOUSE_UP, _spacer_up_cb, obj);
 833    evas_object_smart_callback_add(obj, "sub-object-del", _sub_del, obj);
 834
 835    _mirrored_set(obj, elm_widget_mirrored_get(obj));
 836    _sizing_eval(obj);
 837
 838    // TODO: convert Elementary to subclassing of Evas_Smart_Class
 839    // TODO: and save some bytes, making descriptions per-class and not instance!
 840    evas_object_smart_callbacks_descriptions_set(obj, _signals);
 841    return obj;
 842 }
 843
 844 EAPI void
 845 elm_slider_span_size_set(Evas_Object *obj, Evas_Coord size)
 846 {
 847    ELM_CHECK_WIDTYPE(obj, widtype);
 848    Widget_Data *wd = elm_widget_data_get(obj);
 849    if (!wd) return;
 850    if (wd->size == size) return;
 851    wd->size = size;
 852    if (wd->horizontal)
 853      evas_object_size_hint_min_set(wd->spacer, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale, 1);
 854    else
 855      evas_object_size_hint_min_set(wd->spacer, 1, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale);
 856    if (wd->indicator_show)
 857      edje_object_signal_emit(wd->slider, "elm,state,val,show", "elm");
 858    else
 859      edje_object_signal_emit(wd->slider, "elm,state,val,hide", "elm");
 860    edje_object_part_swallow(wd->slider, "elm.swallow.bar", wd->spacer);
 861    _sizing_eval(obj);
 862 }
 863
 864 EAPI Evas_Coord
 865 elm_slider_span_size_get(const Evas_Object *obj)
 866 {
 867    ELM_CHECK_WIDTYPE(obj, widtype) 0;
 868    Widget_Data *wd = elm_widget_data_get(obj);
 869    if (!wd) return 0;
 870    return wd->size;
 871 }
 872
 873 EAPI void
 874 elm_slider_unit_format_set(Evas_Object *obj, const char *units)
 875 {
 876    ELM_CHECK_WIDTYPE(obj, widtype);
 877    Widget_Data *wd = elm_widget_data_get(obj);
 878    if (!wd) return;
 879    eina_stringshare_replace(&wd->units, units);
 880    if (units)
 881      {
 882         edje_object_signal_emit(wd->slider, "elm,state,units,visible", "elm");
 883         edje_object_message_signal_process(wd->slider);
 884      }
 885    else
 886      {
 887         edje_object_signal_emit(wd->slider, "elm,state,units,hidden", "elm");
 888         edje_object_message_signal_process(wd->slider);
 889      }
 890    _min_max_set(obj);
 891    _units_set(obj);
 892    _sizing_eval(obj);
 893 }
 894
 895 EAPI const char *
 896 elm_slider_unit_format_get(const Evas_Object *obj)
 897 {
 898    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 899    Widget_Data *wd = elm_widget_data_get(obj);
 900    if (!wd) return NULL;
 901    return wd->units;
 902 }
 903
 904 EAPI void
 905 elm_slider_indicator_format_set(Evas_Object *obj, const char *indicator)
 906 {
 907    ELM_CHECK_WIDTYPE(obj, widtype);
 908    Widget_Data *wd = elm_widget_data_get(obj);
 909    if (!wd) return;
 910    eina_stringshare_replace(&wd->indicator, indicator);
 911    _indicator_set(obj);
 912 }
 913
 914 EAPI const char *
 915 elm_slider_indicator_format_get(const Evas_Object *obj)
 916 {
 917    ELM_CHECK_WIDTYPE(obj, widtype) NULL;
 918    Widget_Data *wd = elm_widget_data_get(obj);
 919    if (!wd) return NULL;
 920    return wd->indicator;
 921 }
 922
 923 EAPI void
 924 elm_slider_horizontal_set(Evas_Object *obj, Eina_Bool horizontal)
 925 {
 926    ELM_CHECK_WIDTYPE(obj, widtype);
 927    Widget_Data *wd = elm_widget_data_get(obj);
 928    if (!wd) return;
 929    horizontal = !!horizontal;
 930    if (wd->horizontal == horizontal) return;
 931    wd->horizontal = horizontal;
 932    _theme_hook(obj);
 933 }
 934
 935 EAPI Eina_Bool
 936 elm_slider_horizontal_get(const Evas_Object *obj)
 937 {
 938    ELM_CHECK_WIDTYPE(obj, widtype) EINA_FALSE;
 939    Widget_Data *wd = elm_widget_data_get(obj);
 940    if (!wd) return EINA_FALSE;
 941    return wd->horizontal;
 942 }
 943
 944 EAPI void
 945 elm_slider_min_max_set(Evas_Object *obj, double min, double max)
 946 {
 947    ELM_CHECK_WIDTYPE(obj, widtype);
 948    Widget_Data *wd = elm_widget_data_get(obj);
 949    if (!wd) return;
 950    if ((wd->val_min == min) && (wd->val_max == max)) return;
 951    wd->val_min = min;
 952    wd->val_max = max;
 953    if (wd->val < wd->val_min) wd->val = wd->val_min;
 954    if (wd->val > wd->val_max) wd->val = wd->val_max;
 955    _min_max_set(obj);
 956    _val_set(obj);
 957    _units_set(obj);
 958    _indicator_set(obj);
 959 }
 960
 961 EAPI void
 962 elm_slider_min_max_get(const Evas_Object *obj, double *min, double *max)
 963 {
 964    if (min) *min = 0.0;
 965    if (max) *max = 0.0;
 966    ELM_CHECK_WIDTYPE(obj, widtype);
 967    Widget_Data *wd = elm_widget_data_get(obj);
 968    if (!wd) return;
 969    if (min) *min = wd->val_min;
 970    if (max) *max = wd->val_max;
 971 }
 972
 973 EAPI void
 974 elm_slider_value_set(Evas_Object *obj, double val)
 975 {
 976    ELM_CHECK_WIDTYPE(obj, widtype);
 977    Widget_Data *wd = elm_widget_data_get(obj);
 978    if (!wd) return;
 979    if (wd->val == val) return;
 980    wd->val = val;
 981    if (wd->val < wd->val_min) wd->val = wd->val_min;
 982    if (wd->val > wd->val_max) wd->val = wd->val_max;
 983    _val_set(obj);
 984    _units_set(obj);
 985    _indicator_set(obj);
 986 }
 987
 988 EAPI double
 989 elm_slider_value_get(const Evas_Object *obj)
 990 {
 991    ELM_CHECK_WIDTYPE(obj, widtype) 0.0;
 992    Widget_Data *wd = elm_widget_data_get(obj);
 993    if (!wd) return 0.0;
 994    return wd->val;
 995 }
 996
 997 EAPI void
 998 elm_slider_inverted_set(Evas_Object *obj, Eina_Bool inverted)
 999 {
1000    ELM_CHECK_WIDTYPE(obj, widtype);
1001    Widget_Data *wd = elm_widget_data_get(obj);
1002    if (!wd) return;
1003    inverted = !!inverted;
1004    if (wd->inverted == inverted) return;
1005    wd->inverted = inverted;
1006    if (wd->inverted)
1007      edje_object_signal_emit(wd->slider, "elm,state,inverted,on", "elm");
1008    else
1009      edje_object_signal_emit(wd->slider, "elm,state,inverted,off", "elm");
1010    edje_object_message_signal_process(wd->slider);
1011    _val_set(obj);
1012    _units_set(obj);
1013    _indicator_set(obj);
1014 }
1015
1016 EAPI Eina_Bool
1017 elm_slider_inverted_get(const Evas_Object *obj)
1018 {
1019    ELM_CHECK_WIDTYPE(obj, widtype) EINA_FALSE;
1020    Widget_Data *wd = elm_widget_data_get(obj);
1021    if (!wd) return EINA_FALSE;
1022    return wd->inverted;
1023 }
1024
1025 EAPI void
1026 elm_slider_indicator_format_function_set(Evas_Object *obj, char *(*func)(double val), void (*free_func)(char *str))
1027 {
1028    ELM_CHECK_WIDTYPE(obj, widtype);
1029    Widget_Data *wd = elm_widget_data_get(obj);
1030    if (!wd) return;
1031    wd->indicator_format_func = func;
1032    wd->indicator_format_free = free_func;
1033    _indicator_set(obj);
1034 }
1035
1036 EAPI void
1037 elm_slider_units_format_function_set(Evas_Object *obj, char *(*func)(double val), void (*free_func)(char *str))
1038 {
1039    ELM_CHECK_WIDTYPE(obj, widtype);
1040    Widget_Data *wd = elm_widget_data_get(obj);
1041    if (!wd) return;
1042    wd->units_format_func = func;
1043    wd->units_format_free = free_func;
1044    _min_max_set(obj);
1045    _units_set(obj);
1046 }
1047
1048 EAPI void
1049 elm_slider_indicator_show_set(Evas_Object *obj, Eina_Bool show)
1050 {
1051    ELM_CHECK_WIDTYPE(obj, widtype);
1052    Widget_Data *wd = elm_widget_data_get(obj);
1053    if (show) {
1054         wd->indicator_show = EINA_TRUE;
1055         edje_object_signal_emit(wd->slider, "elm,state,val,show", "elm");
1056    }
1057    else {
1058         wd->indicator_show = EINA_FALSE;
1059         edje_object_signal_emit(wd->slider, "elm,state,val,hide", "elm");
1060    }
1061 }
1062
1063 EAPI Eina_Bool
1064 elm_slider_indicator_show_get(const Evas_Object *obj)
1065 {
1066    ELM_CHECK_WIDTYPE(obj, widtype) EINA_FALSE;
1067    Widget_Data *wd = elm_widget_data_get(obj);
1068    if (!wd) return EINA_FALSE;
1069    return wd->indicator_show;
1070 }
1071