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